What Is The Mercedes-Benz Check Engine Light And How To Reset It

Mercedes-Benz Check Engine Light Reset

If the Mercedes-Benz check engine light has illuminated your vehicle's dashboard, come to the nearby service department at Holmes Auto Group for a Mercedes-Benz check engine light reset.

The professional team of auto mechanics in our Mercedes-Benz oil change center and brake shop can reset the Mercedes-Benz yellow engine warning light on your new lease deal.

What Does a Check Engine Light Mean on a Mercedes-Benz?

If there is a Mercedes-Benz check engine light flashing on your car's dashboard or center console, get in touch with our dealership for a Mercedes-Benz check engine light diagnosis and reset. There are many causes for a check engine light to come on.

A check engine light can come on to alert you to something as benign as a fuel cap that isn't securely fastened or something as serious as an issue with your car's engine. That's why it's essential to schedule a Mercedes-Benz check engine light diagnosis with our certified service center right away.

What Causes a Mercedes-Benz Check Engine Light?

There are several reasons why the Mercedes-Benz check engine light has turned on. The most common include a malfunction with the fuel injection system, a damaged oxygen sensor, faulty head gasket, dirty mass airflow sensor, defective spark plugs, or a faulty emissions control part.

In most cases, you can still drive with a check engine light on, but it's important to diagnose why the check engine light is on to avoid causing significant and expensive damage to your vehicle.

How to Reset the Mercedes-Benz Check Engine Light?

When you bring your vehicle in for service, our technicians will diagnose why the check engine light has turned on in your vehicle, fix the problem, then reset the check engine light. There are two ways to reset the check engine warning light on vehicles from our new Mercedes-Benz inventory.

Steps to Reset Check Engine Light With a Scanner

The quickest way to diagnose and reset a check engine light is with an OBDII Scanner that reads the diagnostic codes for your vehicle. One of our technicians will plug a compatible scanner into your vehicle, and the car's computer will give the scanner a code for what seems to be the trouble.

One of our technicians will then look up what that code means and fix the problem. Once the faulty component has been repaired or replaced, the check engine light should turn off.

If you want to get a sense of what's turning the Mercedes-Benz check engine light on and off in your vehicle, there are plenty of code readers and scan tools you can purchase in your local auto parts store or online. If you're looking for a recommendation for the best OBDII scanner you can buy, feel free to speak with the associates in our service department.

Steps to Reset Check Engine Light Without a Scanner

Some of our customers like to work on their cars themselves. If you like to turn a wrench and need to perform a Mercedes-Benz check engine light reset without a scanner, the first thing to do is remove the fuel filler cap then screw it back down securely. A loose fuel cap is one of the most common causes for a check engine light.

Next, disconnect the negative battery cable and wait a few minutes. The positive terminal will have a + symbol embossed into the plastic, often covered by a RED plastic cap. The negative terminal will have a - symbol and may have a black cap over the terminal. When working on your car's battery, be sure to wear the necessary safety gloves and glasses.

A simple socket set will likely be all you need to loosen the nut on the battery terminal cable and wiggle off the cable. Disconnecting the negative battery cable for 30-60 seconds should clear the check engine codes and reset the diagnostic system.

If you set the negative battery cable to the side, make sure the cable does not touch the battery or any metal parts of the vehicle to avoid grounding the circuit. If the problem was indeed a loose fuel cap, the light should turn off immediately.

If this does not work, the next thing to do is repeat what you just did, but before you reinstall the negative battery cable, press the car's horn or turn on the headlights. This will release any stored energy in your vehicle's electrical circuit and cut all power to the check engine light.

If the light is still on after trying this, it now becomes a matter of trial and error with attempting to check the spark plugs, fuses, O2 sensors, etc., and disconnecting/reconnecting the negative battery cable after each attempt.

Frequently Asked Questions

Why is my Mercedes-Benz check engine light on?

There are several possible reasons why the check engine light has turned on in your vehicle. If the check engine light ever illuminates your car's dashboard, we suggest bringing your vehicle in for certified auto repair at our Mercedes-Benz dealership right away. A check engine light can indicate a problem with the fuel injection system, the fuel system, the exhaust system, the engine management system, or the ignition system.

Will the Mercedes-Benz check engine light reset itself?

A check engine light will only reset itself automatically once the problem that caused it to turn on is resolved. When you bring your vehicle to our service department for a check engine light repair, our technicians will use a scanner to diagnose why the check engine light is on. We will then repair the underlying issue and reset the check engine light.

Can I drive my Mercedes-Benz with the check engine light on?

In most cases, yes, you can drive your Mercedes-Benz with check engine light on, but we recommend bringing your car in for check engine light repair immediately. A problem with the fuel system can cause your vehicle to enter emergency mode or "limp home mode," which turns off many vehicle systems and limits the vehicle's speed. If a faulty O2 sensor has tripped the check engine light, driving your car can damage the catalytic converter, which can be an expensive repair.

What does yellow engine light mean on a Mercedes-Benz?

The yellow engine light is most likely a check engine light. There are many causes for a check engine light to come on, including a problem with the fuel system, the exhaust system, the fuel injection system, the ignition system, or the engine management system. A check engine light will not reset itself and should not be ignored. Check engine light codes range from minor to severe and should be immediately diagnosed by certified Mercedes-Benz technicians.

Mercedes-Benz Check Engine Light | Holmes Auto Group - Frequently Asked Questions(FAQ)