general problems of the 2012 Mercedes Benz C300

12 problems related to electrical system have been reported for the 2012 Mercedes Benz C300. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Mercedes Benz C300 based on all problems reported for the 2012 C300.

1 Electrical System problem

Failure Date: 05/16/2025

I was replacing rear tail light bulb. Now I'm getting an error message on instrument cluster. I tried to fix the issue but couldn't do to the fact the wiring harness has melted. Mercedes benz had a recall back in 2013 saying this is a safety issue. No recall for our car.

2 Electrical System problem

Failure Date: 05/10/2024

The contact owns a 2012 mercedes-benz C300. The contact stated that after opening the sunroof and then attempting to close the sunroof, the sunroof failed to fully close. The contact had to open and close the sunroof several times before the sunroof closed. Additionally, the contact stated that there was water entering the vehicle from the sunroof and caused electrical failures. The contact stated that the vehicle was drivable, but the "anti-theft" warning light illuminated. The contact stated that several other warning lights later illuminated, and the vehicle would not start. The contact had the vehicle towed to a dealer who diagnosed the vehicle and determined that water had damaged the driver’s side electrical wiring harness. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 169,000.

3 Electrical System problem

Failure Date: 04/29/2024

Vehicle will not start, possible esl/eis failure.

4 Electrical System problem

Failure Date: 01/24/2022

While driving, engine stopped, could not steer. . Looks like a defective electronic ignition switch or steering lock! it seems to be a common problem on these cars!!! the car would not start. After 8 attempts, I was able to start car but was afraid to drive it. Could have been a disaster.

5 Electrical System problem

Failure Date: 10/15/2021

3 signal signal light comes one saying abs, another srs malfunction, also crushed control inoperable. Car will come one as normal next day car comes on no lights not 1 button work turn signals didn’t work then my car fan came on in the engines the also the when they the electric isn’t working I have to manually shift the gear.

6 Electrical System problem

Failure Date: 02/01/2021

The contact owns a 2012 Mercedes Benz C300. The contact stated that while driving approximately 45 mph, a burning type odor was present inside the vehicle. Whiling inspecting the vehicle it was discovered that rear driver and passenger side tail light plugs had melted. Also, after turning the front driver seat heater on a burning odor was present and the seat felt extremely hotter the normal. The cause of the failures were not determined. The manufacturer and local dealer were not yet notified of the failures. The failure mileage was 70,000. ## VIN passed ## mercedes-benz 2012 C300 ##.

7 Electrical System problem

Failure Date: 11/07/2018

2012 Mercedes Benz C300 - rear tail light tail light failure, found burn marks in the vehicle bulb assembly (bulb panel) and burned wires it has a complete loss of tail light lamps function.

8 Electrical System problem

Failure Date: 09/05/2018

Steering wheel lock after vehicle is shut down. When you return to the vehicle insert the key the instrument cluster, speedo, steering wheel is unresponsive which will not allow you to turn the engine. This should be a recall it's a electronic steering lock that fails on several Mercedes Benz causing the owner to tow the vehicle to the dealership for a 2,000 dollar repair. It happens several times before it completely fails.

9 Electrical System problem

Failure Date: 06/04/2018

Upon starting the vehicle I receive airbag warnings. One for the driver side and another one for the passenger side. I can click on "ok" to clear them out but with the airbag recall and no resolution I am fearful of a malfunction. I had my car to the mercedes dealer two times and was told they would need to investigate it, at my expense, which could be anywhere between $500-$4500 depending on what they find. With a safety issue at risk I think the responsibility is on mercedes to investigate and correct this at no expense to me. I will have to sell the car and lose money over it. I keep waiting for the airbags in recall to come in and have been living with it like this for over a year but I am seeing no end in sight to the recall being resolved anytime soon.

10 Electrical System problem

Failure Date: 08/13/2017

My airbags go on and off on there own. My electrical system is always messed up. My lighting goes on and off, the electrical has caused the vehicle to sometimes jsut shut off compleytely and not turen on for days. I have had times I had to get my vehicle towed.

11 Electrical System problem

Failure Date: 05/11/2016

My vehicle was damaged by k and h auto. The electrical unit is malfunctioning, the light is broken on the right side, and the rotors and brakes have been rusted, please have someone attend to this matter. Thanks, and have a very blessed day. Another company by the name of ans towing, towed my vehicle without care and I am now having acceleration issues with my vehicle. The vehicle was dragged through water on October 17-18, 2018.

12 Electrical System problem

Failure Date: 03/16/2014

The air bag light was acting up like turning on and couple mins turn off and I took it to the Mercedes Benz to check it and they told the sensor was deffected and I couldn't afford for the prices and I told them that this car have and recall thats why I bring it here and they charge $132. 40 for diagnostic.


Other Electrical System related problems of the 2012 Mercedes Benz C300

Electrical System problems
12
Car Will Not Start problems
1

C300 Service Bulletins
C300 Safety Recalls
C300 Defect Investigations