The taillights in my 2012 c300 was starting to go out intermittently. At first the notification came on for the brake light but the brake light kept working. Afterwards the rest of the taillights and the sidemarker light went out as well. I went to go take a look and the grounding wire was oxidated and corroded. A known issue in which there was a recall made for the 2008-2011 version of the w204 but this did not apply to the 2012 w204. As of last week my entire rear drivers side light is out which is a safety hazard especially at night. The hazard lights dont work in case of an emergency on one side, the brake lights are out to notify the driver behind me take I need to stop which can lead to a rear end collision, as well as the left turn signal not working leading to drivers not knowing that I will be turning left or needing to merge left as needed. All of this is a known safety hazard to Mercedes but no recall has been submitted yet.
The worst 2012 Mercedes Benz C Class problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Electrical1
- Lights1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Electrical1
- Lights1
Recalls
No recalls on record for this model year.
Technical service bulletins for the 2012 Mercedes Benz C Class 8
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- SENTEX gate operator with Clik Card Remote not compatible with Homelink
- Xentry (mercedes): the fuse and relay boxes (SRB) in engine compartment or rear compartment has a...
- Xentry (mercedes): with steering at full lock, noise CAN be heard, like knocking and/or creaking, coming...
- Mercedes: an incorrect spare tire was installed, in some vehicles, due to a coding option error and spare...
- Xentry (mercedes): check engine light (CEL) is activated; stored in engine control unit is very fine leak....
- Mercedes: the automatic transmission do not meet internal specifications, in some vehicles, that causes,...
- Xentry (mercedes): after taking vehicle out transport mode, instrument cluster displays message sos mbrace...
- Mercedes benz: right front seat belt or left front seat belt does not roll up completely
2012 Mercedes Benz C Class fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 1.8L 4‑cyl | RWD | 21 | 30 | 25 |
| 3.5L 6‑cyl | RWD | 19 | 28 | 22 |
| 3.5L 6‑cyl | 4WD | 19 | 27 | 22 |
| 3.0L 6‑cyl | 4WD | 17-18 | 24-25 | 20 |
| 6.2L 8‑cyl | RWD | 13 | 19 | 15-16 |
What 2012 Mercedes Benz C Class owners say
Most recent owner complaints, unedited.
Compare the 2012 Mercedes Benz C Class
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Questions about the 2012 Mercedes Benz C Class
Is the 2012 Mercedes Benz C Class reliable?
Owners have filed 1 complaint about the 2012 Mercedes Benz C Class, fewer than a typical C Class model year.
What is the 2012 Mercedes Benz C Class year score?
The 2012 Mercedes Benz C Class scores 95 out of 100 (good). The score compares it with the other model years of the Mercedes Benz C Class: 75 is a typical year, 50 means twice the usual complaints, and serious complaints and recalls lower it.
What is the most common problem with the 2012 Mercedes Benz C Class?
Electrical system, with 1 complaint. Next is lights (1).
How many recalls does the 2012 Mercedes Benz C Class have?
No recalls on record.
What year does the Mercedes Benz C Class have the most electrical problems?
The Mercedes Benz C Class model years with the most electrical complaints are 1995 (45 complaints) and 1994 (10 complaints).
What gas mileage does the 2012 Mercedes Benz C Class get?
Official estimates for the 2012 Mercedes Benz C Class range from 15 to 25 mpg combined. The most efficient version (1.8L 4-cyl, RWD) gets 21 city and 30 highway.
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