Seeing the activate check engine light on the dashboard of your Mercedes always means it’s time for scheduled service.
After addressing the original issue successfully, you can re-check the check engine light. Will Mercedes check engine light reset itself or not is depends on determining and solving the real issue.
Following this, we have broadly discussed it and will share some effective ways to reset the Mercedes check engine light successfully if it doesn’t reset itself.
Will Mercedes Check Engine Light Reset Itself?
If you solve the underlying issue that causes the Mercedes check engine light to come on, it should then reset itself. However, after addressing the reason, you should drive the car for a few miles to check if the check engine light reset itself or not. If it doesn’t, take your Mercedes to the nearest service center.
Why does the Mercedes check engine light come on?
The Mercedes-Benz is quite different from other vehicles you see on the road. But it includes check engines similar to other models that indicate failing components or declines in performance.
So if the check engine light of your Mercedes comes on, fix the underlying issue first before resetting the light.
So what causes a Mercedes check engine light to turn on? These parts can be responsible:
- Failed oxygen (O2) sensor
- A Malfunctioning Mass Air Flow Sensor
- Loosened or damaged fuel cap
- Damaged spark plugs
- Clogged catalytic converter
If you generally drive around Stamford or Rye, taking the car to the Mercedes-Benz of Greenwich will be the best decision to solve the issue. If you have access to a scanner, you can alternatively re-add the code.
Is it okay to drive a Mercedes-Benz with the check engine light on?
It would be better if you investigated the sign first, which encourages the check engine light to come on. But if you are planning to keep driving your Mercedes while keeping the light on, be aware of these consequences:
- If the loose gas cap causes the problem, continuing driving will evaporate the fuel.
- If the failing oxygen sensor is responsible, it will reduce the gas mileage and encourage the car to produce more pollutants.
- The engine can run sluggishly if the clogged catalytic converter is the source of the problem.
- The car won’t deliver the best performance if the failing Mass Air Flow Sensor is the culprit.
- Due to a damaged spark plug, the vehicle won’t start.
If you keep driving your Mercedes for the long term without solving any of these problems, it will limit your car’s performance. Even your vehicle’s engine can wear out more quickly.
However, dealing with these problems will turn the check engine light off automatically. Luckily, you can reset the Mercedes-Benz check engine light at your home garage by following these methods.
How to Reset a Mercedes Check Engine Light
With a Scanner (Method No 1)
All the vehicle manufacturers are equipping their cars with next-generation technologies and features.
Thanks to the advanced OBD II diagnostic scanner, an advanced technology that helps fix the check engine light issue more efficiently.
If you have access to an advanced OBD II diagnostic scanner, simply plug it under the car’s steering wheel and determine the problem in a flash.
However, you must learn how to read the code of an OBD II diagnostic scanner. After identifying the issue, press “Reset” or “Clear” on the scanner. If the problem isn’t dealt with, the light should turn off immediately.
Without a Scanner (Method No 2)
Start by disconnecting the negative battery wire for several minutes so it can force the diagnostic system of the vehicle to recalibrate.
If you have already solved the issue, but the check engine light remains on, apply this method: Firstly, wear safety gloves and glasses and remove all the metal and jewelry you have to wear. Switch the ignition off, then open the hood.
Find out the battery location and the negative terminal, which is black or marked with a negative sign.
Now use a wrench to loosen the terminal and hold the negative wire to the side for around a minute.
Don’t let the wear get tough, otherwise, it will create risky sparks! Ask your friend to press the car’s horn to drain the surplus power from the car.
Finally, rejoin the negative battery wire and keep everything in its original place.
Remember, rejoining the battery may sometimes cause electronic systems to reset. Thus, you may need to do some reprogramming.
What Does The Yellow Engine Light Indicate On A Mercedes?
Generally, the coolant fluid soaks up the heat released by the engine and then dissolves it through the radiator.
This way, the Mercedes prevents its engine from overheating. But if the coolant level in the engine runs low, the yellow engine light will turn on, indicating it’s time to top up.
How To Find The Engine Code On A Mercedes?
The engine code on the Mercedes is usually located in the lower corner of the windshield on the driver’s side.
You will find there a series of letters and numbers. Among them, the 10th from the left indicates the car’s model year, and the 8th is the engine code.
In conclusion, the Mercedes check engine light should reset itself as long as you solve the problems. Likewise, in other makes and models of cars, the check engine light on reduced can come on for plenty of reasons.
You can solve some of the problems like loose gas caps at the home garage, while others are challenging and risky. So, after noticing the check engine light on your Mercedes, the best thing to do is stop driving the car and take it to the service center.