Fixing Your Mercedes’ Engine Stumbles in Dallas

Posted on | 1 May 2019 By Anita Gaal

When you’re driving in your Mercedes, there are a few things that you take for granted. First and foremost among those are likely that when you press on the gas pedal, the car will accelerate, and when you hit the brakes, it will slow and stop. However, there are some engine issues that can make acceleration a bit less reliable.

When your car doesn’t respond the way you expect it to on the road, it’s not only frustrating, it can also be dangerous. That makes it especially important to figure out what’s causing the problem and get it fixed as soon as possible. Below are a few possibilities for what could be causing your Mercedes’s engine to stumble as you’re accelerating.

Clogged Air or Fuel Filter

In order for your vehicle to have the power it needs to move when you tell it to, it requires a mix of air and fuel. If either part of that equation is lacking, you’re going to experience some problems. Air and fuel filters are important, as they keep impurities out of the combustion system, but if they become clogged, they can keep the vehicle from accelerating properly.

Sensor Problems

Inside the engine of your Mercedes is a whole host of sensors that help keep the engine operating the way it should. They monitor everything from temperature to air flow to exhaust levels. Some of these sensors can cause engine stumbles if they begin to malfunction. Some of the sensors you may want to check if your engine is stumbling include:

• Mass Airflow Sensor: The MAF sensor is what monitors how much air is coming into the engine, ensuring that the proper amount of fuel can be provided to combine with it for combustion.
• EGR Valve Position Sensor: This sensor monitors how much of the exhaust fumes are being sent back into the engine to be burnt as fuel. It can occasionally become caked with carbon deposits, causing faulty readings that lead to the engine stumbling.
• Throttle Position Sensor: This sensor’s job is simple: relay to the engine how much you’re pressing on the gas. Obviously if it begins to fail, accelerating will become more difficult.
• O2 Sensor: This sensor monitors how much oxygen is left in the exhaust after the fuel has been burnt, helping the engine adjust the fuel-to-air ratio to be most efficient. Problems with this sensor can lead to erroneous adjustments in the fuel consumption, causing stumbling.

Catalytic Converter

This part is very important for not only your car, but for the environment. The catalytic converter ensures that the exhaust coming out of your vehicle is converted into harmless byproducts, rather than dangerous fumes that can harm the environment. However, it can sometimes become clogged or otherwise damaged, causing your engine to stumble as you attempt to accelerate.

Fuel Injectors

As you might surmise from the part’s name, these pieces spray fuel into the cylinder where combustion occurs. If any of their tiny nozzles become clogged, your engine won’t get the amount of fuel it needs to operate at peak capacity.

Coil Pack

Newer vehicles make use of coil packs on their spark plugs, and the failure of one or more of these packs can cause your engine to stumble as you attempt to accelerate. These can fail due to how long they’ve been in use, mechanical damage, or damage due to poor fuel quality.

Finding the Problem

With so many possibilities, it can be difficult to narrow down where the problem is when your Mercedes begins experiencing engine stumbles. However, it is important to find the problem and take care of it as soon as possible, as many of these problems can compound, causing a domino-like effect in your engine as it begins affecting other parts. Some can even fail to the point of your engine stalling completely or refusing to start.

Thankfully, if you live in the Dallas area, Euro Automotive is here to help. Serving the areas of Dallas, Garland, Arlington, and Fort Worth, TX, our skilled mechanics are well-versed in the Mercedes, so we’ll be able to find the problem quickly and get you back out on the road in no time. Call or stop by today to get started!