2020 Mercedes-Benz C300 problems
NHTSA has received 48 complaints about the 2020 Mercedes-Benz C300, and 17% of them involve engine. Next are forward collision avoidance (8%) and body & structure (8%).
At a glance
- Complaints
- 48 filed with NHTSA
- Most reported
- Engine 17% of complaints
- Crashes and fires
- 7 and 0
- Injuries and deaths
- 8 and 0
- Typical mileage
- 29,000 miles 15 complaints with mileage
Source: NHTSA owner complaints
Where the complaints are
Share of this model year's complaints by the part of the car involved. One complaint can name more than one part, so the shares can add up to more than 100%.
When problems show up
View the numbers
| Mileage | Complaints |
|---|---|
| 0k to 20k miles | 7 |
| 20k to 40k miles | 3 |
| 40k to 60k miles | 1 |
| 60k to 80k miles | 0 |
| 80k to 100k miles | 1 |
| 100k to 120k miles | 3 |
| 120k to 140k miles | 0 |
| 140k to 160k miles | 0 |
| 160k to 180k miles | 0 |
| 180k to 200k miles | 0 |
| 200k+ miles | 0 |
What the data shows
Of the 15 complaints that include odometer readings, half describe a problem before roughly 29,000 miles.
Safety-related details: 7 complaints mention a crash; 8 injuries reported. Its complaints are more severe on average than those of 85% of model years in our database.
Looking only at complaints filed within five years of the model year (so older and newer years are comparable), the 2020 ranks 13th most-complained-about out of 15 model years of the Mercedes-Benz C300 with enough data (41 complaints in that window). It is also covered by 9 safety recall campaigns.
What owners wrote
A few complaints as filed, shortened and with personal details removed. The first ones are among the most serious reports for this model year; the rest are typical.
Automatic emergency braking system & forward collision warning. I experienced a medical emergency and blacked out, hitting 3 cars. The incident happened the morning of Dec. 31, 2021 and my car still has not been evaluated by Mercedes. I was taken to the ER and spent 3 days in the hospital.
On July 17, 2021 I was driving at the posted rate of speed down I-275 Southbound here in Michigan. All of the sudden and without warning, there was a loud explosion which happened, from as near as I can tell, in the driver's side windshield pillar, where there is an airbag. No warning lights came on, and the car did not change its driving characteristics.
The contact owns a 2020 Mercedes-Benz C300. The contact stated while driving 55 MPH, the sunroof exploded without impact and glass fragments fell inside on the rear seats of the vehicle. The vehicle was taken to the dealer and the contact was informed that the sunroof needed to be replaced. The vehicle was not repaired. The contact stated that the failure had occurred twice. The manufacturer was contacted and stated that the vehicle was not under recall. No further assistance was provided.
The contact owns a 2020 Mercedes-Benz C300. The contact stated that a section of the roof near the top of the windshield, between the sunroof, had detached and flown off the vehicle while driving 30 MPH in bumper-to-bumper traffic. The driver was able to grab the portion of the rubber gasket and pulled it into the vehicle through the driver’s side front window. The roof was in three pieces. The contact turned on the hazard lights and was able to pull over safely to the side of the roadway.