Mercedes-Benz C-Class Engine problems
1.1 vs. all vehicles Rising
84 of the 341 complaints about the Mercedes-Benz C-Class (24.6%) concern Engine, making it the model's largest problem area. That share is 1.1× the Engine share across all tracked vehicles.
84Complaints · Engine
24.6%Share of complaints
1.1×vs. all vehicles
21Last 12 months
0.0%Share involving a crash or fire
0Related recalls
Analysis
21 Engine complaints were filed in the last 12 months versus 11 in the 12 months before — up 91%.
None of these reports describes a crash or fire.
No recall campaign addresses Engine for the tracked model years.
By model year
When complaints were filed
Last 12 months: 21 · Previous 12 months: 11
What owners report
Throughout the year, the car had many issues, the blind spot sensors and glass sensors didn't work, and it constantly showed that the stop/start system wasn't working. Twice, the car turned off by itself at a stoplight.
My vehicle developed a coolant warning during normal road use. I had not experienced any known collision, crash, or unusual impact. I brought the vehicle to an authorized Mercedes-Benz dealer for inspection.
The M264 2.0L engine suffered a catastrophic internal failure. While making a left turn at an intersection, the vehicle suddenly shut off and stalled, leaving the car stranded in active traffic and creating an immediate safety risk.
The vehicle experienced a severe safety issue involving a sudden loss of motive power in active traffic. 1. Initial Symptoms & Diagnosis: Recently, the Check Engine Light illuminated.
CEL followed by no crank / no start. Codes u3017 and u0168. Software flashed and no crank / no start returned. SAM & EIS modules replaced and no crank/no start returned with new codes. U103F00 + P143400 + P051300.
The contact owns a 2021 Mercedes-Benz C 300. The contact stated that while depressing the accelerator pedal, there was a loud knocking sound coming from the engine compartment while accelerating. There were no warning lights illuminated.
Excerpts from complaints filed with NHTSA, trimmed for length. The ODI number is NHTSA's record identifier.
Related recalls
No recall campaign addresses Engine for the tracked model years.
Problem areas · Mercedes-Benz C-Class
Mercedes-Benz C-Class problems, complaints & recalls by model year ›
Related reading
- Why modern engines burn oil, and what owner complaints revealDesign choices linked to oil consumption in recent engines, the warning signs owners describe, what counts as normal, and which tracked models currently have the highest engine share in their complaints.