2026 Mercedes-Benz C-Class problems and complaints
Owners have filed 4 complaints with NHTSA about the 2026 Mercedes-Benz C-Class. The most-reported areas: Electrical System (2), Vehicle Speed Control (2), Air Bags (1).
Key takeaways
- 4 owner complaints on file with NHTSA.
- 0 involve a crash, 0 a fire, 0 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Electrical System | 2 | 50% |
| Vehicle Speed Control | 2 | 50% |
| Air Bags | 1 | 25% |
| Structure | 1 | 25% |
| Power Train | 1 | 25% |
| Engine | 1 | 25% |
| Exterior Lighting | 1 | 25% |
One complaint can name several components, so shares add up to more than 100%.
Parts for the 2026 Mercedes-Benz C-Class
GarageDex's verified specs for this car. Each Buy button searches Amazon for that exact part.
- Battery
- Engine oil
- Cabin air filter
- Wiper blades
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| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2026 MERCEDES-BENZ C-CLASS 4 DR N/A RWD | Not rated | Not rated | Not rated | Not rated |
| 2026 MERCEDES-BENZ C-CLASS 4 DR N/A AWD | Not rated | Not rated | Not rated | Not rated |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Air Bags,structure - filed 2026-09-21
The contact owns a 2026 Mercedes-Benz C300. The contact stated that there was white powder discovered inside the vehicle. The contact initially thought that it was mold. The contact stated that the heating system had caused the issue. The air bag dust was on the headliner and the driver's side A-pillar. The vehicle was...
Power Train,electrical System,engine - filed 2026-08-30
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. Now Mercedes is directing the replacement of the ethernet harness between the SAM and EIS. This inte...
Electrical System,exterior Lighting,vehicle Speed Control - filed 2026-08-26
I acquired a Mercedes-Benz C300 from Mercedes-Benz of White Plains at [XXX] [XXX] on the last day of XXX Within 2 days of the car sitting in my driveway, I took it out for a drive; the electronic systems failed while I was driving on the highway. The speedometer and odometer went dark, and the turn signals stopped wo...
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More for the 2026 Mercedes-Benz C-Class
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.