Mercedes-Benz C-Class problems, complaints & recalls by model year
Across 7 model years (2018–2024), NHTSA has logged 331 owner complaints and 0 safety recalls for the Mercedes-Benz C-Class. That averages 7.5 complaints per year on the road — far fewer complaints than typical (index 0.18 against all tracked vehicles). Within the Luxury sedans segment it ranks #6 of 6 for fewest complaints per year; the segment average is 5.1.
Counts are normalized by time on the road, not by sales volume: a popular model generates more reports than a rare one, and complaints are not verified individually. How we count
Analysis
The trend is improving. Measured on complaints filed in the first two years on the road and compared with other vehicles of the same model year, the 2023 and 2024 models run 28% below the 2018 and 2019 models (13 early complaints per model year versus 20).
The 2018 model year has the highest rate (14.9 complaints per year) and the 2021 model year the lowest (2.6). The 2018 model year runs at least 50% above the model's own average — the one to research most carefully. The 2021 model year sits well below the model's average.
Across all tracked model years the most common problem area is Engine (24.2% of complaints), followed by Electrical (14.2%) and Body & structure (12.4%). Recurring terms in owner reports: “crankcase”, “ventilation”, “positive”, “amg” and “valve”. 18 complaints (5.4%) describe a crash or fire; across all model years owners report 11 injuries and 0 deaths.
In the last 12 months owners filed 62 complaints versus 49 in the previous 12 months — a steady pace. The 2019 model year generated the most recent reports (15). Across model years, half of all reported incidents occur within 42 months of the model year's start.
No safety recall is on record for the tracked model years. No NHTSA defect investigation covers the tracked model years.
Every other tracked model among Luxury sedans has fewer complaints per year, including Lexus ES, BMW 5 Series, BMW 3 Series and Audi A4.
Model years at a glance
| Year | Complaints | Complaints per year on the road | Complaint index | Complaints in first 2 years on the road | vs. same-year average | Last 12 months | Recalls | Most common issue | |
|---|---|---|---|---|---|---|---|---|---|
| 2018 Years to research carefully | 129 | 14.9 | 0.35 | 28 | 0.31 | 14 | 0 | Engine | View › |
| 2019 | 75 | 9.8 | 0.23 | 12 | 0.15 | 15 | 0 | Engine | View › |
| 2020 | 46 | 6.9 | 0.16 | 10 | 0.18 | 11 | 0 | Engine | View › |
| 2021 Fewest complaints | 15 | 2.6 | 0.06 | 1 | 0.02 | 8 | 0 | Engine | View › |
| 2022 | 26 | 5.6 | 0.13 | 17 | 0.23 | 3 | 0 | Electrical | View › |
| 2023 | 25 | 6.8 | 0.16 | 18 | 0.22 | 3 | 0 | Driver-assist systems | View › |
| 2024 | 15 | 5.6 | 0.13 | 8 | 0.11 | 8 | 0 | Electrical | View › |
1.00 means the same rate as the comparison group. 2.00 means twice as many complaints per year on the road. Complaints in first 2 years on the road: vs. same-year average. How we count
Trend · vs. same-year average
Complaints in first 2 years on the road ÷ All-vehicle average (1.00)
When complaints were filed
Last 12 months: 62 · Previous 12 months: 49 Steady
Problem areas
Electrical ›
47 · 14.2% · 0.9 vs. all vehicles · Too few recent reports to judge
- communication electrical6
- notification communication6
- electrical system12
- received18
Body & structure ›
41 · 12.4% · 1.35 vs. all vehicles · Rising
- sunroof17
- detached9
- convertible5
- panoramic7
Interior & equipment
34 · 10.3% · 1.15 vs. all vehicles · Too few recent reports to judge
- sunroof8
- crankcase ventilation3
- panoramic4
- glass6
Wheels, tires & suspension
21 · 6.3% · 2.55 vs. all vehicles · Too few recent reports to judge
- tire18
- amg4
- rim5
- run flat3
Fuel system
21 · 6.3% · 1.47 vs. all vehicles · Too few recent reports to judge
- fuel15
- system gasoline5
- pump5
- leaking4
Steering
20 · 6.0% · 0.93 vs. all vehicles · Too few recent reports to judge
- steering17
- available recall5
- recall remedy4
- confirmed available5
Brakes
18 · 5.4% · 0.9 vs. all vehicles · Too few recent reports to judge
- brake14
- assist8
- active5
- front9
Airbags & seat belts
18 · 5.4% · 1.42 vs. all vehicles · Too few recent reports to judge
- retract6
- belt7
- stowed position3
- seat8
Transmission / powertrain
13 · 3.9% · 0.34 vs. all vehicles · Too few recent reports to judge
- gear5
- green3
- valve3
- neutral3
Driver-assist systems
13 · 3.9% · 0.68 vs. all vehicles · Too few recent reports to judge
- active brake3
- collision8
- avoidance4
- braking5
Other
3 · 0.9% · 0.5 vs. all vehicles · Too few recent reports to judge
Lighting
2 · 0.6% · 0.39 vs. all vehicles · Too few recent reports to judge
Only problem areas with at least 40 complaints get their own page.
Common terms in reports
- crankcase25
- ventilation23
- positive17
- amg13
- valve29
- engine light43
- mbusa9
- sunroof26
Vehicle age at incident
Median age at incident: 42 months
What owners report
I own a 2020 Mercedes-Benz C300 equipped with a power trunk. On July 22, 2026, I took my vehicle to Annapolis Mercedes-Benz because the power trunk was repeatedly closing on its own while people were standing in the trunk opening.
While driving on the highway with the panoramic sunroof open, the glass suddenly shattered, sounding like a gunshot or an explosion. Shards of glass flew into the vehicle and rained down on me, creating a very hazardous driving situation.
Sunroof causing dangerous pinch conditions. Roof tracks break and cause pinch areas with partial opening of roof
Shifting gears when stopped and the car lunged forward while I was stopped at a red light. I almost hit the car in front of me at the red light. Very rough gear changes and changing out of the correct gear to the wrong one and then back into another one.
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.
Segment peers · Luxury sedans
| # | Models | Complaints | Complaints per year on the road | Complaint index | Trend | Recent activity | Recalls | Most common issue |
|---|---|---|---|---|---|---|---|---|
| 1 | Lexus ES | 137 | 3.4 | 0.08 | Stable | Falling | 4 | Airbags & seat belts |
| 2 | BMW 5 Series | 184 | 4.0 | 0.09 | Improving | Steady | 1 | Airbags & seat belts |
| 3 | BMW 3 Series | 219 | 4.6 | 0.11 | Stable | Rising | 1 | Engine |
| 4 | Audi A4 | 251 | 5.6 | 0.13 | Worsening | Falling | 12 | Electrical |
| 5 | Mercedes-Benz E-Class | 230 | 5.9 | 0.14 | Stable | Steady | 0 | Electrical |
| 6 | Mercedes-Benz C-Class | 331 | 7.5 | 0.18 | Improving | Steady | 0 | Engine |
Recalls by year received
No recalls on record for this model year.
- Campaigns: 0
- Do-not-drive / park-outside: 0
- Over-the-air fix: 0
Safety recalls: 2018 (0) · 2019 (0) · 2020 (0) · 2021 (0) · 2022 (0) · 2023 (0) · 2024 (0)
Investigations
No NHTSA investigation covers the tracked model years.
Frequently asked questions
Which Mercedes-Benz C-Class model year has the most complaints?
The 2018 model year has the highest rate (14.9 complaints per year) and the 2021 model year the lowest (2.6).
Is the Mercedes-Benz C-Class getting better or worse?
The trend is improving. Measured on complaints filed in the first two years on the road and compared with other vehicles of the same model year, the 2023 and 2024 models run 28% below the 2018 and 2019 models (13 early complaints per model year versus 20). In the last 12 months owners filed 62 complaints versus 49 in the previous 12 months — a steady pace.
What are the most common Mercedes-Benz C-Class problems?
Across all tracked model years the most common problem area is Engine (24.2% of complaints), followed by Electrical (14.2%) and Body & structure (12.4%). Recurring terms in owner reports: “crankcase”, “ventilation”, “positive”, “amg” and “valve”.
How does the Mercedes-Benz C-Class compare with other Luxury sedans?
Within the Luxury sedans segment it ranks #6 of 6 for fewest complaints per year; the segment average is 5.1. Every other tracked model among Luxury sedans has fewer complaints per year, including Lexus ES, BMW 5 Series, BMW 3 Series and Audi A4.
Does the Mercedes-Benz C-Class have recalls or open investigations?
No safety recall is on record for the tracked model years. No NHTSA defect investigation covers the tracked model years.