Total Complaints
3 filings
MERCEDES-BENZ C 300 4MATIC · model year
2021 MERCEDES-BENZ C 300 4MATIC
3 NHTSA complaints. A VIN lookup is required to determine whether a specific vehicle has an unrepaired recall.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2021MERCEDES-BENZC 300 4MATIC carries 3 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 0 injuries, and 0 fatalities. No NCAP 5-star crash-test rating is available for this model year in the federal database.
The most frequently selected component label in reports for the 2021 C 300 4MATIC is air bags with 1 filings, followed by power train (1) and suspension (1). Complaint categories reflect owner reports and intake categorization; they do not establish a defect pattern or cause.
NHTSA currently has 15 investigation files overlapping the 2021 C 300 4MATIC. Owners comparing this cohort against neighboring years should read the complaint-by-year trend as report volume, not a causal diagnosis. Use the related-complaint feed and the official recall lookup when researching a specific vehicle.
3
Complaints
0
Crashes
0
Fires
0
Injuries
0
Deaths
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
Complaints vs. fleet median (215)
At or below the fleet median complaint volume.
Complaints by Component
| Component | Count |
|---|---|
| AIR BAGS | 1 |
| POWER TRAIN | 1 |
| SUSPENSION | 1 |
Recent Complaints
20251209AIR BAGS
Driving and something came from underneath the vehicle and cause me to swerve in all the airbags deployed
20251209POWER TRAIN
Driving and something came from underneath the vehicle and cause me to swerve in all the airbags deployed
20251209SUSPENSION
Driving and something came from underneath the vehicle and cause me to swerve in all the airbags deployed
Compare 2021MERCEDES-BENZC 300 4MATIC to Similar Vehicles
NHTSA Investigations
Frequently Asked Questions
How many complaints does the 2021 MERCEDES-BENZ C 300 4MATIC have?▼
The 2021 MERCEDES-BENZ C 300 4MATIC has 3 NHTSA complaints, 0 crashes, 0 fires, 0 injuries, and 0 deaths reported.
What are the most common problems with the 2021 MERCEDES-BENZ C 300 4MATIC?▼
The most-complained component for the 2021 MERCEDES-BENZ C 300 4MATIC is AIR BAGS with 1 complaints. Other frequently reported areas include POWER TRAIN and SUSPENSION.
Is the 2021 MERCEDES-BENZ C 300 4MATIC safe to buy?▼
Review the complaint history, crash and fire reports, safety ratings, and recall status on this page to make an informed decision. No NHTSA crash test rating is available for this model year. Compare with other model years using the links above.
Where does this data come from?▼
All complaint, recall, and safety rating data is sourced from the National Highway Traffic Safety Administration (NHTSA). Complaints are filed by vehicle owners through NHTSA's Office of Defects Investigation.
Vehicle Safety Guides
Data vintage: August 2026. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Every figure on PlainCars is rendered directly from NHTSA complaint and safety data, no number is typed in by an editor. This year-specific record is rendered from NHTSA ODI, recall, and NCAP rows for the 2021 MERCEDES-BENZ C 300 4MATIC; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.
Read our methodology - how this data is sourced, computed, and verified.