repaired · 2025 Q4
Body: roof and pillars
Risk. A detached roof panel can become a road hazard, increasing the risk of a crash.
2015 Mercedes-Benz C400Problems, recalls & complaints
NHTSA has logged 10 owner complaints about the 2015 Mercedes-Benz C400, most often about the structure. It is covered by 8 safety recalls, and for recall 23V-854 the manufacturer reports only 41% of affected cars repaired.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through August 8, 2025. Updated daily.
Complaints by system
Where the 2015 Mercedes-Benz C400 has problems
10 complaints grouped by the system owners reported.
6Structure
1Electronic stability control (ESC)
1Engine
1Suspension
1Vehicle speed control
1Electrical system
1Visibility/wiper
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Structure | 6 | 0 |
| Electronic stability control (ESC) | 1 | 0 |
| Engine | 1 | 0 |
| Suspension | 1 | 0 |
| Vehicle speed control | 1 | 0 |
| Electrical system | 1 | 0 |
| Visibility/wiper | 1 | 0 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
8 recalls
2015 Mercedes-Benz C400 recalls and how many were fixed
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
repaired · 2023 Q3
Body: roof and pillars
Risk. The adhesive bonding of the front panel might deteriorate, possibly causing the front panel to detach from the vehicle and become a road hazard, increasing the…
repaired · 2021 Q1
Communication
Risk. An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.
repaired · 2019 Q4
Air bags: frontal
Risk. If the driver air bag inadvertently deploys, it can increase the risk of injury and a crash.
Show 4 more recalls
repaired · 2017 Q3
Steering: electric power assist system
Risk. If the vehicle experiences a loss of power steering assist, extra steering effort will be required, especially at lower speeds, increasing the risk of a…
repaired · 2016 Q3
Delivery: fuel pump
Risk. If the locking plate is not properly secured to the fuel delivery module it may become loose, and leak fuel, increasing the risk of a fire.
repaired · 2017 Q3
Exterior lighting: headlights
Risk. If the original horizontal adjustment is used to alter the low beam aim, the misaimed headlamp may not properly illuminated the road or cause increased glare…
repaired · 2016 Q1
Steering
Risk. If the sliding shaft becomes disengaged from the steering coupling socket, the driver may experience noises, steering backlash, and in a worst case, loss of…
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Mercedes-Benz.
Best & worst years
2015 vs. every other C400 year
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the C400 median. How we score
'15
- Avoid
- Caution
- Solid
- Best
- Not rated
2 investigations
NHTSA defect investigations
Federal investigations that included the 2015 Mercedes-Benz C400, and the recalls they led to.
- Desiccated Air Bag Inflator RuptureOpen
- Front Roof Panel DetachmentLed to recall 21V-197
In owners' words
What C400 owners report
Recent structure complaints filed with NHTSA, shortened. Personal details are removed.
The contact owns a 2015 Mercedes Benz C400. The contact stated that while vehicle was inside a high-pressure car wash, water leaked from the roof panel at the front of the vehicle, nearby the front windshield. The cause of the failure was not yet determined, and the vehicle was not repaired. The…
The contact owns a 2015 Mercedes-Benz C400. The contact stated that while the vehicle was being serviced, the contact was informed by the dealer that the rear subframe needed to be replaced. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage…
The contact owns a 2015 Mercedes-Benz C400. The contact stated while driving 55-60 MPH, the front roof panel separated and flew off. The contact drove back and was able to pick the front roof panel off the road. The vehicle was taken to the dealer, where it was determined that the front roof panel…
Own a 2015 C400?
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.