2021 Mercedes-Benz C-Class problems and recalls

53% of owner complaints on the 2021 Mercedes-Benz C-Class related to the Engine (8 of 15).

15
Complaints
0
Recalls
0
Crash reports
0
Fire reports
0
Injuries
53.0
Severity index

Severity index 53.0 Medium. The index weights crashes, fires, injuries and fatalities per 100 complaints. How it is calculated.

Middle half of all tracked vehiclesThis vehicle: 53.0p25 46p75 80cleanestworst
Severity index against the quartile range for all tracked vehicles.

Components cited in complaints

EngineEngine: 8 complaints (53.3%)8 53%Power TrainPower Train: 2 complaints (13.3%)2 13%Air BagsAir Bags: 2 complaints (13.3%)2 13%Fuel/Propulsion SystemFuel/Propulsion System: 2 complaints (13.3%)2 13%Fuel SystemFuel System: 1 complaints (6.7%)1 7%GasolineGasoline: 1 complaints (6.7%)1 7%VisibilityVisibility: 1 complaints (6.7%)1 7%SuspensionSuspension: 1 complaints (6.7%)1 7%
A single complaint can cite more than one component, so shares total over 100%.
ComponentComplaintsShare of complaints citing it
ENGINE853.3%
POWER TRAIN213.3%
AIR BAGS213.3%
FUEL/PROPULSION SYSTEM213.3%
FUEL SYSTEM16.7%
GASOLINE16.7%
VISIBILITY16.7%
SUSPENSION16.7%

Complaints filed per year

0472022: 12023: 12024: 32025: 72026: 3 (partial year)22232425726
Complaints by the calendar year they were filed. The hatched bar is the current year to date.
YearComplaints
20221
20231
20243
20257
2026 (year to date)3
Filings in 2023 to 2025 ran 11.0x those in 2022 to 2022 (11 against 1).

Other Mercedes-Benz C-Class model years

Severity index for every other model year on file. Compare all 13 years side by side.

Source. NHTSA public complaint and recall APIs (api.nhtsa.gov), retrieved 2026-08-13. Complaints are unverified consumer reports. Totals vary with units sold and years on the road. Not affiliated with NHTSA or any manufacturer.