Tag Archives: auto repair

Why Your German Car Hesitates When Accelerating and How to Fix It

Posted on by

There is a distinct expectation that comes with owning a German vehicle. You expect precision engineering, a smooth ride, and—perhaps most importantly—immediate, responsive power when you step on the gas. So, when your BMW, Audi, or Mercedes-Benz starts to hesitate, surge, or jerk during acceleration, it isn’t just annoying; it feels like a betrayal of the car’s character.

Uneven acceleration is a common performance issue that can turn a spirited drive into a stressful experience. It often manifests as a “stumble” when pulling away from a stoplight or a lack of power when trying to merge onto the highway. While these high-performance machines are complex, the causes behind this hesitation often boil down to a specific set of components failing to communicate effectively. Understanding what’s happening under the hood is the first step toward restoring the driving dynamics you paid for.

Call 317-571-0800 For German Car Auto Repair in Carmel Indiana
Call 317-571-0800 For German Car Auto Repair in Carmel Indiana

Common Culprits Behind Uneven Acceleration

When your engine hesitates, it is usually struggling to balance the delicate mixture of air and fuel required for combustion. In German vehicles, which rely heavily on sophisticated sensor networks, even a minor discrepancy in data can cause the Electronic Control Unit (ECU) to fumble.

Faulty Mass Airflow Sensor (MAF)

The Mass Airflow Sensor (MAF) is often the primary suspect when acceleration issues arise. Located between the air filter and the engine’s intake manifold, this sensor measures the volume and density of air entering the engine. The ECU uses this data to calculate the precise amount of fuel needed for efficient combustion.

Over time, the hot wire inside the MAF sensor can become coated with microscopic debris, oil, or dust. This contamination insulates the wire, causing it to send sluggish or inaccurate data to the engine computer. When the ECU receives bad data, it may inject too much or too little fuel, leading to a “lean” or “rich” running condition. The result is often a noticeable hesitation or jerking motion when you try to accelerate, as the engine struggles to adjust the fuel trim on the fly.

Issues with the Fuel System

For your car to accelerate smoothly, fuel must be delivered at a precise pressure and volume. If the flow is restricted, the engine will starve for fuel under load.

  • Clogged Fuel Injectors: Carbon deposits can build up on injector nozzles over time, disrupting the spray pattern and preventing fuel from atomizing correctly. This leads to uneven combustion and power loss.
  • Failing Fuel Pump: If the fuel pump cannot maintain the necessary pressure, you will likely feel the car surge or sputter, especially at higher speeds or during hard acceleration.

Problems with Spark Plugs or Ignition Coils

German engines are notorious for being demanding on their ignition systems. If the air and fuel are present but the spark is weak or mistimed, the cylinder won’t fire correctly. This is known as a misfire.

Worn spark plugs or failing ignition coils are leading causes of misfires under load. You might feel this as a rhythmic shaking or a “stumble” that worsens the harder you press the gas pedal. In modern turbocharged engines, a weak spark can easily be “blown out” by high cylinder pressures, causing instant power loss during acceleration.

Vacuum Leaks

Your engine acts as a giant air pump, operating under a vacuum. If there is a leak in any of the hoses, gaskets, or the intake boot, unmetered air—air that the MAF sensor didn’t count—enters the engine. This “pirate air” leans out the mixture significantly.

The symptoms of a vacuum leak are often most apparent at low speeds or idle, where the unmetered air constitutes a larger percentage of the total airflow. You might notice a rough idle that smooths out slightly as you rev the engine, accompanied by a hesitation right when you first step on the accelerator.

Software or ECU Issues

Sometimes, the hardware is fine, but the “brain” of the car is confused. The ECU manages thousands of parameters every second. If the software is outdated or develops a glitch, it may misinterpret sensor data. In some cases, German manufacturers release Technical Service Bulletins (TSBs) and software updates to refine throttle mapping and transmission shift points, resolving hesitation issues without replacing a single physical part.

Schedule German Car Repair and Service in Indy Today ✅

How to Diagnose the Problem

Identifying the root cause of uneven acceleration requires a systematic approach. Guessing and throwing parts at a German car can quickly become expensive.

Use an OBD-II Scanner

Your car’s On-Board Diagnostics (OBD) system is your most powerful tool. Even if the Check Engine Light isn’t flashing, there may be “pending codes” stored in the computer.

  • P0101: Often indicates a range/performance issue with the Mass Airflow Sensor.
  • P0171 / P0174: These codes indicate a “System Too Lean,” pointing toward vacuum leaks or fuel starvation.
  • P0300: This represents random/multiple cylinder misfires, suggesting ignition or fuel delivery problems.

Visual Inspection

Pop the hood and take a close look at the engine bay. Look for:

  • Cracked or brittle rubber hoses (vacuum lines).
  • Tears in the intake boot connecting the air filter box to the throttle body.
  • Loose electrical connectors on the ignition coils or fuel injectors.

Solutions and Repairs for Slow Acceleration

Once you have pinpointed the issue, the repair is usually straightforward, though it requires precision.

Replacing Faulty Components

If diagnostics point to a sensor, replacement is often the only reliable fix. For German vehicles, it is critical to use Original Equipment Manufacturer (OEM) parts (like Bosch or Siemens). Aftermarket sensors often have slightly different tolerances that can cause the Check Engine Light to reappear shortly after installation.

Cleaning Fuel Injectors

If the injectors are clogged, a professional cleaning service can sometimes restore them. However, if the internal solenoid is failing, replacement is necessary. Cleaning the MAF sensor with a specialized solvent is also a valid first step before replacing it, potentially saving you hundreds of dollars.

Software Updates

If no mechanical faults are found, a specialist can check your vehicle’s current software version (I-Level) against the latest factory release. updating the integration level of the vehicle can resolve known glitches in throttle response.

Preventative Maintenance: The Key to Performance

The best way to fix acceleration issues is to prevent them from happening in the first place. German engineering requires strict adherence to maintenance schedules.

  • Regular Servicing: Change air filters and spark plugs at the recommended intervals. A clogged air filter puts extra strain on the MAF sensor.
  • Quality Fuel: High-performance engines require high-octane fuel with good detergents. Cheap gas can accelerate carbon buildup on valves and injectors.
  • Synthetic Oil: Always use the correct specification of synthetic oil. In modern engines with variable valve timing (like VANOS or Valvelift), oil pressure controls valve timing. Sludge from poor oil can cause sluggish performance.

Your Next Steps

Uneven acceleration is a symptom that something is amiss in your vehicle’s engine management system. Ignoring it can lead to reduced fuel economy, catalytic converter damage, and eventually, a breakdown. Your car was built to perform—ensure it lives up to that standard.

If you are tired of the hesitation and want to restore the smooth, powerful ride your car was built for, you need a specialist who understands German engineering. For expert diagnostics and German automotive repair in Carmel, Indianapolis, Indiana, trust Autohaus Dierolf. We treat your vehicle with the precision it deserves.

Call to Book an Estimate

Related Post: How to Get Transmission Repair for European Cars Cheaper Than the Dealer

OEM vs. Aftermarket: Making the Right Choice for Your Vehicle

Posted on by

There are few sinking feelings quite like seeing your “Check Engine” light flicker on during your morning commute. Beyond the immediate worry about safety and scheduling, there is the inevitable anxiety about cost. When you finally get your vehicle to the shop, you are often presented with a question that can leave many drivers feeling uncertain: “Do you want us to use OEM parts or aftermarket parts?”

For the uninitiated, this choice can feel like a gamble. Is the more expensive option actually better, or are you paying for a brand name? Is the cheaper option safe, or will it fail in six months?

Your vehicle is a complex machine, and every component plays a role in your safety and the car’s longevity. Understanding the difference between these part types is crucial for making informed decisions that protect both your wallet and your peace of mind. This guide will walk you through the nuances of automotive parts so you can authorize that next repair with confidence.

Call 317-571-0800 For Used Parts for German Cars in Indianapolis
Call 317-571-0800 For Used Parts for German Cars in Indianapolis

What Are OEM Parts?

OEM stands for Original Equipment Manufacturer. When you buy a new car, every part on it—from the brake pads to the taillights—is an OEM part. These components are made by the vehicle’s manufacturer (like Ford, Toyota, or BMW) or by a specific company that the manufacturer hired to produce those parts for them.

Think of OEM parts as the exact match for what your car was born with. If you need to replace a side mirror on a Mercedes CLA 250 and you choose an OEM part, you are buying the identical mirror that was installed on the assembly line. It is designed with the exact same engineering specs, materials, and safety standards as the original.

Understanding Alternatives: The Aftermarket

The alternative to OEM is the aftermarket. Aftermarket parts are any replacement parts for a vehicle that are not made by the original equipment manufacturer. These companies buy the rights to produce parts that fit and function like the originals, but they are third-party entities.

It is important to clarify a common misconception: “Aftermarket” does not automatically mean “low quality.” The aftermarket spectrum is vast. It ranges from high-performance brands that improve upon the original design to budget manufacturers creating cheaper, generic alternatives. When you walk into a generic auto parts store, the vast majority of what you see on the shelves is aftermarket.

The Case for OEM Parts

For many car owners, sticking with OEM is the default choice, and there are compelling reasons for this.

Guaranteed Fit and Function

There is no guesswork with OEM. Because the part was created using the manufacturer’s specific blueprints, you know it will fit perfectly. There is no need for the mechanic to force a clamp or modify a bracket. The crumple zones will react exactly as the engineers intended, and the paint finish on body panels will match the factory standard.

Quality Assurance and Warranty

OEM parts usually come with a warranty backed by the automaker, typically one year or 12,000 miles. This offers a layer of protection that provides significant peace of mind. If the part fails, you have a clear path to recourse.

Simplicity

Choosing OEM simplifies the buying process. You don’t have to compare five different brands of water pumps or read reviews to see which one lasts longest. You simply get the one designed for your car.

The Downside: Cost and Availability

The primary drawback of OEM parts is the price tag. They are almost always more expensive than their aftermarket counterparts—sometimes significantly so. Additionally, because they are specific to the manufacturer, you usually have to purchase them through a dealership or authorized service center, which can sometimes mean waiting for a part to be shipped if it’s not in stock.

Search Our Inventory of Auto Parts for German Cars ☑

The Case for Aftermarket Parts

The aftermarket industry is massive for a reason. It offers flexibility and options that the OEM route often cannot match.

Cost-Effectiveness

The biggest appeal of aftermarket parts is the price. They are often less expensive than OEM parts, which can save you a substantial amount of money on major repairs. For older vehicles where the resale value is low, saving money on repairs often makes the most financial sense.

Variety and Availability

You can find aftermarket parts at almost any gas station, auto parts store, or local mechanic. This wide availability means you can often get your car back on the road faster. Furthermore, the variety allows you to choose a part that fits your specific budget.

Potential for Higher Quality

Surprisingly, aftermarket parts can sometimes be better than the original. If a car manufacturer discovers a recurring issue with a stock part (like a plastic hinge that keeps breaking), aftermarket companies can reverse-engineer the part and fix the flaw, perhaps by using metal instead of plastic.

The Downside: Inconsistent Quality

The lack of standardization is the main risk here. Because there are so many third-party manufacturers, quality varies wildly. A brake pad from a reputable aftermarket brand might be excellent, while a “white box” generic version might wear out in half the time. Using aftermarket parts may also void your car’s warranty in some specific cases, so it is vital to check your coverage.

Factors to Consider When Choosing

So, how do you decide? The “right” choice depends heavily on your specific situation.

1. The Age of Your Vehicle

If you are driving a brand-new car, sticking with OEM is usually the best route to maintain the vehicle’s value and ensure you don’t run afoul of warranty requirements. However, if you are driving a 15-year-old sedan with 200,000 miles on it, paying a premium for OEM parts might not be a wise financial investment. High-quality aftermarket parts are often perfectly sufficient for older vehicles.

2. The Type of Repair

Not all car parts are created equal. When it comes to safety-critical components—such as brakes, steering, and suspension—many experts recommend leaning toward OEM or high-end aftermarket brands. You never want to cut corners on the parts that stop the car.

For non-essential or cosmetic repairs, such as air filters, door handles, or interior trim, cheaper aftermarket parts are often indistinguishable from the original and do the job just fine.

3. Collision Repairs

If you have been in an accident, the choice between OEM and aftermarket body panels is significant. OEM panels are guaranteed to have the proper fit and crash safety ratings. Aftermarket body panels may not align perfectly, leading to uneven gaps, or they may not have the same rust protection as the original metal.

Finding Reliable Parts and Service

Navigating the world of auto repairs requires a bit of diligence. If you choose to go the aftermarket route, research the brand. Look for certifications like CAPA (Certified Automotive Parts Association), which tests parts to ensure they meet quality standards.

Most importantly, rely on a mechanic you trust. A good automotive technician will be honest with you about when you can save money with an aftermarket alternative and when you really need to spring for the OEM component.

Specialized Care for European Vehicles

The stakes are often higher when dealing with precision-engineered vehicles. If you drive a German automobile, such as a BMW, Audi, or Mercedes-Benz, the tolerance for generic parts is much lower. These high-performance machines require specific maintenance standards to run correctly.

If you are looking for German car part procurement and replacement, seek out specialists who understand the intricate engineering of your vehicle. Utilizing the correct parts for European imports is essential for maintaining the performance and handling you expect from your investment.

In Summary

Ultimately, there is no single “correct” answer in the debate between OEM and aftermarket parts. It is a balance between your budget, your car’s needs, and your long-term plans for the vehicle.

By understanding the differences, you move from being a passive customer to an active participant in your vehicle’s care. Whether you choose the factory-perfect fit of an OEM part or the cost-effective utility of an aftermarket solution, the most important factor is that the repair keeps your vehicle safe and reliable on the road.

If you’re in Carmel, Indiana, and need expert German auto repair, we’re here to help. With a dedicated team specializing in German vehicles, we ensure your car receives the precision care it deserves. Contact Us Today to schedule an appointment and experience dependable service that keeps your vehicle performing at its best!

Call Now to Book Service

Related Post: Smart Savings: Your Complete Guide to Used German Auto Parts

Prevent Expensive German Car Repairs With These Tips

Posted on by

Owning a German car, whether it’s a BMW, Audi, Mercedes, or Volkswagen, brings a unique sense of pride. These vehicles are known for their precision engineering, performance, and luxury. However, that same engineering can lead to a surprisingly high auto repair bill if the car isn’t properly maintained.

The key to enjoying your German vehicle without breaking the bank lies in preventative maintenance. A small investment of time and attention can help you avoid major issues and keep your car running smoothly for years.

This guide offers practical German car care advice to help you sidestep common problems and reduce long-term costs. By understanding the essentials of preventative auto repair, you can protect your investment and continue to enjoy the driving experience you love.

Call 317-571-0800 For German Car Maintenance in Indianapolis
Call 317-571-0800 For German Car Maintenance in Carmel, Indianapolis

German Car Care Strategies That Can Help Prevent Costly Repairs

Check Your Fluids Regularly

Fluids are the lifeblood of your vehicle, and keeping them at the correct levels is one of the most critical aspects of DIY car care. Neglecting them can lead to some of the most expensive repairs.

  • Engine Oil: Clean oil lubricates engine components, reduces friction, and helps dissipate heat. Infrequent oil changes can lead to sludge buildup and, in worst-case scenarios, catastrophic engine damage that could cost thousands of dollars to fix.
  • Coolant (Antifreeze): Coolant prevents your engine from overheating in the summer and freezing in the winter. If the coolant level is low or the fluid is old, it can cause the water pump to fail, a repair that can cost between $800 and $1200.
  • Brake Fluid: This hydraulic fluid transfers the force from your foot on the brake pedal to the brakes themselves. Old or contaminated brake fluid can compromise braking performance and damage components.
  • Transmission Fluid: This fluid lubricates and cools the transmission. Neglecting to service it can lead to transmission failure, with repairs often averaging $2,000 to $4,000.

DIY Tip: How to Check Your Fluids

  • Locate Dipsticks: Park your car on a level surface. For engine oil, pull out the dipstick, wipe it clean, re-insert it fully, and then pull it out again to check the level. Most German cars have color-coded caps for different fluids.
  • Check Reservoirs: Coolant, brake fluid, and power steering fluid are typically held in translucent reservoirs with “min” and “max” markings, making it easy to see the current level.
  • Top Off as Needed: If a fluid is low, top it off with the correct type specified in your owner’s manual. Using the wrong fluid can cause significant damage.

Prioritize Tire Maintenance

Proper tire care is essential not just for safety but also for preventing costly damage to other parts of your car.

  • Proper Inflation: Underinflated or overinflated tires wear unevenly and can negatively impact fuel efficiency and handling. Check your tire pressure monthly. You can find the recommended pressure on a sticker inside the driver’s side doorjamb.
  • Tire Rotation: Regularly rotating your tires—typically every 5,000 to 7,500 miles—ensures they wear evenly, extending their lifespan.
  • Wheel Alignment: If your wheels are misaligned, it can cause rapid and uneven tire wear. More importantly, it puts extra stress on your suspension system, potentially leading to repairs costing between $500 and $1,500.

Call Our German Car Mechanics for Service Today! ✨

Keep an Eye on Your Brakes

Your braking system is a critical safety feature, and ignoring signs of wear can lead to dangerous situations and expensive brake repairs.

  • Brake Pads: These create the friction needed to stop your car. When they wear thin, you might hear a squealing or grinding noise.
  • Rotors: These are the discs the pads clamp onto. If you continue driving with worn-out pads, the metal backing can grind against the rotors, scoring them. Replacing scored rotors can cost $500 to $1,000 per axle—a much higher price than a simple pad replacement.
  • Calipers: These house the brake pads and pistons. A regular inspection can catch issues like leaks or sticking calipers before they become major problems.

Follow Scheduled Maintenance

German car manufacturers provide detailed service schedules for a reason. Following these recommended intervals for your BMW, Audi, or Mercedes is the best way to ensure its longevity and performance. Services like spark plug replacement, timing belt changes, and fluid flushes are designed to prevent larger, more expensive issues from developing. While it might seem costly at the time, this scheduled German car maintenance is an investment that pays off.

Address Minor Issues Promptly

That small rattle, strange noise, or warning light on your dashboard is your car’s way of telling you something is wrong. Ignoring these early warnings can allow a minor issue to snowball into a major failure. For example, a small coolant leak can lead to an overheated engine, and a slightly vibrating steering wheel could be an early sign of a suspension problem. Addressing these issues quickly is a core principle of preventative auto repair.

Find a Qualified German Car Mechanic

While some maintenance can be done at home, many repairs require specialized knowledge and tools. General mechanics may not have the specific training or diagnostic equipment needed for German vehicles. Finding a specialist who regularly works on brands like BMW, Mercedes, and Audi is crucial. An experienced German car mechanic will understand the common quirks of these vehicles and can diagnose problems more accurately, saving you time and money.

Conclusion

The appeal of a German car is its blend of performance and sophisticated design. By embracing a proactive approach to German car care, you can ensure your vehicle remains a source of joy, not a financial burden. Regular fluid checks, diligent tire maintenance, and timely inspections are not expenses—they are investments in your car’s health and your peace of mind. Taking these steps will help you avoid a staggering auto repair bill and keep your car performing at its peak.

Ready to give your car the expert care it deserves? Our certified mechanics specialize in German vehicles and are here to help.

Schedule Maintenance with Our Experts

Related Post: Avoiding Financial Pitfalls: How to Save Money on High-End Car Repairs

How to Figure Out Why Your Car Won’t Start

Posted on by

Nothing is more frustrating than jumping into your car, turning the key (or pressing the button), and… nothing happens. Your car won’t start. Whether you’re rushing to work, heading out for errands, or picking up the kids, a car refusing to start is a situation no one wants to deal with. 

There are plenty of potential culprits, from something as simple as an empty fuel tank to more complex issues like a faulty starter motor. Understanding why your car won’t start and knowing the proper troubleshooting steps can save you time, money, and stress. 

This guide breaks down the common reasons for car starting problems, how to diagnose them, and practical advice on what to do next. 

Call 317-571-0800 if Your German Car Won't Start in Indianapolis Indiana
Call 317-571-0800 if Your German Car Won’t Start in Indianapolis Indiana

Typical Car Starting Problems

Battery Issues 

The battery is the heart of your car’s electrical system. When there’s a problem, your car won’t start—but diagnosing the issue is simpler than you think.

Dead or Weak Battery 

A dead or weak battery is one of the most common reasons why your car refuses to start. 

How to Check 

  • Turn the key to the “ON” position and check the dashboard lights. If the lights are dim or don’t turn on, it’s likely your battery. 
  • Use a multimeter to measure the voltage. A reading below 12.4 volts means the battery is weak. 

How to Fix It 

  • Jump-start the car: 
  1. Connect the positive (+) terminal of the dead battery to the positive terminal of a working battery. 
  2. Attach the negative (-) terminal of the working battery to an unpainted metal surface on the car with the dead battery (not directly to the battery). 
  3. Start the working car and wait a few minutes, then try starting your car. 
  4. Have the battery tested at Autohaus Dierolf to determine if it needs replacement.

Corroded Battery Terminals 

Even if the battery isn’t dead, corroded connections can block electrical flow. 

How to Spot It 

  • Look for white or bluish-green buildup around the battery terminals. 

How to Fix 

  • Disconnect the cables (start with the negative). Use a battery terminal cleaner or baking soda mixed with water to remove the corrosion.
  • Reconnect the cables securely. 

⚙ Pro Tip: Regularly clean the terminals to prevent recurring issues. 

Starter Problems 

If your battery checks out but your car still won’t start, the culprit may be the starter motor. 

Faulty Starter Motor 

The starter motor is responsible for cranking your engine to get it running. 

Signs of a Starter Problem 

  • A clicking noise when you turn the key.
  • Dashboard lights dim significantly when you try to start the car. 
  • A burning smell or smoke (rare but critical). 

Quick Fix

  • Try gently tapping the starter with a wrench while someone else attempts to start the car. This can temporarily “unstick” the solenoid. 

If these steps fail, the starter motor likely needs professional repair or replacement. 

Schedule Automotive Diagnostic Testing Today

Fuel System Issues 

Even the most powerful engine won’t run without fuel. Problems in your car’s fuel system can lead to frustrating starting issues, but most of them are easy to diagnose and fix.

Empty Fuel Tank 

It may sound obvious, but overlooking this simple issue is common. Sometimes, drivers misjudge how much fuel they have left or forget to refuel.    

What to Do 

  • Check your fuel gauge. If it’s low or empty, add fuel and try starting again. 
  • If needed, add fuel and try starting the car again. If the car still doesn’t start, there could be another issue at play, such as a problem with the fuel pump or fuel line. 

Clogged Fuel Filter 

The fuel filter plays a crucial role in keeping debris and impurities from entering the engine. Over time, it can become clogged, restricting or completely blocking the flow of fuel. This can lead to serious performance issues or prevent the car from starting altogether. 

Signs 

  • The car starts but stalls quickly.
  • Poor engine performance when running. 

Solution 

  • Replacing a fuel filter is routine maintenance.
  • Check your service schedule to avoid this problem in the future. 

Malfunctioning Fuel Pump 

The fuel pump transfers fuel to the engine. If it fails, your car won’t start. 

How to Check and Fix

  • Turn the key to the “ON” position and listen for a whirring sound near the fuel tank. If you don’t hear it, the pump may be faulty. 
  • A qualified mechanic can run a fuel pressure test to confirm the issue. 

Ignition System Faults 

The ignition system is vital for creating the spark needed to ignite the engine’s air-fuel mixture. 

Bad Spark Plugs 

Worn or fouled spark plugs are a frequent culprit in cars that won’t start. 

What to Do

  • Remove the spark plugs and inspect them for damage or deposits. 
  • Replace worn or damaged spark plugs with new ones. 

Faulty Ignition Coils 

Ignition coils generate the high voltage needed for the spark plugs to work.  If you suspect ignition coil trouble, have them tested at Autohaus Dierolf for accuracy. 

Symptoms 

  • Engine misfires 
  • Reduced fuel efficiency 

Other Potential Issues 

While battery, starter, fuel, and ignition problems cover most cases, here are additional possibilities for those experiencing persistent trouble:

Faulty Car Computer (ECU) 

Modern vehicles, especially complex ones like BMW, Volkswagen, Mercedes-Benz, and Porsche, rely heavily on an Engine Control Unit (ECU). If the ECU malfunctions, it can confuse the starting system. 

Solution

  • Visit Autohaus Dierolf for a car diagnostic service to pinpoint the issue. 

Anti-Theft System Issues 

Many German cars have advanced anti-theft systems. If activated unintentionally, they may prevent the car from starting. 

What to Do 

  • Look for the anti-theft symbol on your dashboard. If it’s flashing, your system may need to be reset according to your car’s manual. 

Avoid These Common Mistakes When Troubleshooting 

  • Overlooking obvious issues like an empty fuel tank. 
  • Incorrect jump-starting that damages your car’s electrical system. 
  • Neglecting corroded battery terminals, which is often a quick fix. 
  • Ignoring warning signs, like clicking or whirring sounds. 
  • Assuming it’s always the battery without testing it first. 
  • Replacing parts unnecessarily without verifying the root cause. 
  • Postponing professional diagnostics, which can save you from more expensive repairs later. 

Take Action to Get Back on the Road 

Car starting problems are stressful, but knowing the common causes makes troubleshooting manageable. Whether it’s a weak battery, a failing starter motor, or a clogged fuel filter, addressing these issues early can prevent bigger headaches down the road. 

If your car won’t start and you’re unsure why, schedule a diagnostic service at Autohaus Dierolf today. Our expert mechanics in Indianapolis specialize in German cars like BMW, Volkswagen, and Audi, and will get you back on the road quickly and safely. 

Book Your Appointment Now

Related Post: Engine Stalling and Misfires: Causes, Solutions, and Prevention 

How Does Tire Width Affect Gas Mileage in Cars?

Posted on by

Today, everyone is looking for the answer to better gas mileage.  Vehicle owners and drivers are on a constant hunt for secrets, miracle cures, rises in the economy, and blatant luck to reduce gas mileage, prices, and fuel consumption. There are several reasons why vehicles can get good or bad gas mileage. There are so many factors that affect this area of concern; however, there is one variable that is hardly discussed but highly influential when it comes to fuel mileage.  This variable is tire width.  Tires have a large influence on how a car or truck operates on the road.

Continue reading to learn how tire size can affect fuel economy and gas mileage on the road.

Fuel System Repair Carmel Indianapolis
Fuel System Repair and Car Maintenance Carmel, Indiana 317-571-0800

The 101 on Gas Mileage and Tire Care

There are two things to consider when thinking about tires and their effect on gas mileage; one is wind resistance, and the other is rolling resistance. When a car is driving at higher speeds, it experiences higher wind resistance; this means lower fuel economy. Rolling resistance is the impact the road has on the tires, and how it affects drivability. If you change the features (size and width) of your tires, it will then influence the interaction it has with the road, thus affecting the gas mileage. This is where tire width can begin to influence gas mileage.

Tire Size and Width Influences Gas Mileage

Many people believe by changing the height of a car’s tires, they can increase its fuel economy. This is not a reliable idea. You see, speedometers are specifically calibrated to the number of revolutions a set of tires makes per mile while driving.  If the original set of tires is replaced, the calibration will be off and changes in fuel economy will be blurred.  Shorter tires will calculate at higher gas mileage because they will make so many more revolutions per mile. This negatively affects fuel consumption because it makes the car’s engine work at a higher rpm to achieve the same speeds. Taller tires will do just the opposite while still offering an inaccurate reading.

Tire Width versus Gas Mileage

Tire width is one of the only tire size factors that can influence gas mileage in a positive way. For example, a narrow tire will have less wind resistance, rolling resistance, and weight, thus, increasing gas mileage. If choosing a narrower tire, be aware that they can make the car’s handling characteristics more difficult to control. It is best to always install the proper size tires for your particular vehicle.  A professional tire tech or mechanic will have no problem helping you figure this out. Also, keeping your tires fully inflated can improve gas mileage.

Do you need fuel system repair or factory scheduled maintenance for a European car in Carmel, Indianapolis, IN? Contact Autohaus Dierolf at 317-571-0800 for the best deals around town!

More Reads to Check Out:

Top 5 Car Parts Affected By Cold Weather
How to Start the New Year With Better Fuel Mileage
Routine Automotive Services Recommended Just for European Vehicles

European Automotive Repair Carmel
European Automotive Repair Carmel Indiana 317-577-0800

The Seven Essential Automotive Fluids Every Vehicle Needs

Posted on by

When it comes to car care, your vehicle needs more than just a run through the neighborhood car wash every now and then. In adherence to most manufacturer’s instructions, it is important to service your vehicle’s tires, engine, lighting system, battery, and more. But undeniably, one the most vital maintenance practices you simply cannot neglect are your vehicles essential automotive fluids. There are seven automotive fluids that every vehicle needs to operate safely, or at all for that matter.

Continue reading to learn which 7 automotive fluids every vehicle needs, and where to get trusted Indianapolis car maintenance and advice.

European Auto Repair and Service
European Auto Repair and Service Carmel, Indiana 317-571-0800

➀ Motor Oil

Motor oil is one of the basic, primary fluids that all vehicle’s need to operate safely, or at all. Motor oil is intended to lubricate the moving parts inside a car engine’s crankcase. Without it, an engine will quickly overheat, causing the vehicle to break down. This is because all the moving parts within a car engine creates friction, which produces heat. The lubrication reduces this friction, which in return, prevents overheating. Motor oil protects an engine’s pistons, valves, and all its other moving parts. Have your oil changed every 6 months or 5,000 miles, more or less depending on how much you drive.

➁ Brake Fluid

The ability to stop a vehicle is just as important as the ability to make it go. Just like motor oil, brake fluid is also one of the most important fluids for any vehicle. A car’s brake system uses hydraulic pressure to make a vehicle come to a stop. When a brake pedal is pushed, the brake line system compresses the brake fluid, which then allows the hydraulic force to be transferred to the brake pads and rotors where the friction is made that stops a vehicle. If there is a leak in this system, or no brake fluid at all, a vehicle loses its capacity to stop upon request. Brake fluid must be re-filled on a regular basis. The general rule is to have your vehicle inspected for all fluid changes and replacements, as well as other factory services, every 3 to 6 months depending on how much you drive and the age of the car or truck.

➂ Radiator Fluid (Coolant or Anti-Freeze)

Radiator Fluid, also called coolant or anti-freeze, is extremely important for your car or truck. It is a heat-transfer liquid that prevents a motor from overheating. It does this by cycling through an engine and collecting heat as it flows; and then returns the collected heat to the radiator, which is then filtered and released through the exhaust and muffler. A car is not operational if it overheats. Operating a car without coolant can cause irreversible damages to the engine and other parts of the vehicle, as well as, put passengers and drivers in danger. Adding anti-freeze to your engine is simple and can be done on your own. Simply locate the radiator cap, unscrew, and our in store-bought pre-mixed coolant. Be sure to have your car’s radiator flushed annually by a professional mechanic.

➃ Transmission Fluid

Transmission fluid is not a solution that requires a car owner to check on their own. Professionals typically tend to these types of fluids when facilitating regular scheduled maintenance tasks. Transmission fluid is rust-colored, or almost a reddish hue. It is used to lubricate and cool the inner components of a vehicle’s transmission, similar to motor oil. 

➄ Power Steering Fluid

Power steering fluid is also typically checked and administered by a professional automotive technician during routine factory care. Power steering fluid is pressurized by a small hydraulic pump that is powered by the engine.  Its main responsibility is to make turning a car easier.  It increases the functionality of the steering mechanism that directs the car tires while driving on the road.

➅ Battery Fluid

Many vehicles today are manufactured with maintenance-free batteries; however, some older models will require a vehicle owner to manually replace the battery fluid on a regular basis. In these type of vehicle batteries, the individual cells need to be filled with the proper type of battery fluid in order for the vehicle to run.

➆ Windshield Wiper Fluid

Although commonly overlooked, a driver could almost not live without windshield wiper fluid! Mud, dirt, water spots, insects, fingerprints, and more can be distracting on a vehicle’s windshield. Windshield wiper fluid is a soapy viscous solution that can be controlled manually by a push of a button inside the car. This button or attachment is generally near the steering wheel. Depending on how often it is used, windshield wiper fluid should be refilled every few months or so.

Auto Repair and Factory Scheduled Maintenance in Carmel, Indiana

Call Autohaus Dierolf at 317-571-0800 to request a free estimate, or to schedule an appointment, for European auto repair or factory scheduled car maintenance in Carmel, Indiana. Our German factory-trained mechanics provide a wide range of automotive maintenance and repair services for all European make and model vehicles. Best of all, we offer free written estimates and extensive warranties on all our work. Don’t wait another minute to get your needed automotive work done. Call our office today to get started.

European Automotive Repair Carmel
European Automotive Repair Carmel Indiana 317-577-0800

Summertime Automotive Care Advice to Live By

Posted on by

Although the damaging winter snow and salt can be rough for cars and trucks, summer weather can equally take a toll on your vehicle as well. The combination of high temperatures and general wear and tear can negatively affect several vital components of a vehicle, including the battery, tires, radiator, and more. This is why it is critical to remember safe and effective auto care in the summer heat.

Continue reading to review some helpful automotive care tips to keep your vehicle running smoothly this summer!

Car Radiator Repair Service in Carmel, Indiana
Car Radiator Repair Service in Carmel, Indiana 317-571-0800

Car Battery Service

High temperatures and overcharging can cause the battery in your vehicle to drain faster, shortening its life. This is because heat can cause battery fluid to evaporate quickly, consequently damaging its internal structure. To avoid such problems, have your vehicle serviced regularly by a licensed mechanic who can make sure your electrical system is charging at the correct rate. For car batteries that require “topping off”, it is necessary to check the levels more often in hot weather. Keep in mind that dirt is another cause behind battery power loss. So be sure the top of your battery remains clean, since dirt and corrosion can interrupt current flow.

Radiator Service

Another important component to service properly in summer heat is your car’s radiator. High temperatures cause the cooling system to work harder, therefore relying on the radiator fluid more. Simply be sure that your radiator fluid is always a 50:50 mix of coolant and water, and routinely have your radiator flushed and refilled once every year to support an optimal cooling system. During routine radiator service, your mechanic will complete a comprehensive visual inspection, and then run a pressure test, thermostat test, cooling fan test, and more. And remember to never open a radiator cap that is hot to the touch!

Tire Service

Your tires will certainly wear out more in hotter weather since they experience more stress in such conditions. This is why tire service and tire care are important for summer. Be sure your tires are inflated properly, and check them regularly for structural damages. Have a professional auto shop service your tires every 6,000 miles with tire rotation and balancing, inflation, replacement, and more.

Auto AC Service

An auto AC system is designed to control the interior climate of a vehicle, including temperature and humidity, and comes in many different forms depending on the make and model of the car. Routine auto AC service is a critical part of preventative maintenance for your vehicle. Not only does it provide the proper inspections and replacements necessary for every summer, it prevents future breakdowns and costly repairs.Keep in mind that a refrigerant leak is damaging to the ozone layer. Not only does a properly-functioning AC system save on gas mileage, it is environmentally friendly.

Trusted European Car Repair Service in Carmel, Indiana

Call Autohaus Dierolf at 317-571-0800 for European auto repair and service in Carmel, Indiana. Our German factory trained mechanics have more than 30 years of experience specializing in European make and model vehicles. We provide a wide range of automotive repairs and services, including factory scheduled maintenance and auto repair. Call 317-571-0800 for affordable and reputable auto maintenance in Carmel, IN today.

European Automotive Repair Carmel
European Automotive Repair Carmel Indiana 317-577-0800