2021 Mercedes-Benz C 300
Only 13 complaints on file — too few for a fair verdict.
This verdict reflects complaint volume compared to this model's typical year. Recalls and safety issues below apply regardless of the verdict — always check them.
Only 13 complaints on file — too few for a fair verdict. The data below is complete but unranked.
COMPLAINTS PER YEAR
View as data table
| Year | Complaints |
|---|---|
| 2018 | 97 |
| 2019 | 65 |
| 2020 | 32 |
| 2021 | 13 |
| 2022 | 25 |
| 2023 | 22 |
| 2024 | 9 |
| 2025 | 4 |
| 2026 | 1 |
KNOWN PROBLEM AREAS
Only 13 complaints on file for this model year -- too few to rank by share. Raw counts only, below.
7 of 13 total reports mention: engine.
Show complaint excerpts
the check Engine light fault code P012D12 The pressure sensor upstream of the turbocharger had a short circuit to positive. Found Kink wire on upstream pressure sensor. A short circuit to positive. Electrical Wire replaced.
NHTSA ODI report, 20240326
First day leasing the vehicle within 6 hours lights malfunction and malfunction warning on dash to seek workshop, vehicle was taken for inspection to original dealer (Mercedes Benz of Bakersfield).
NHTSA ODI report, 20240128
Piston Connecting Rod broke and left the engine making holes in both sides of the block; Mercedes Benz rejected any responsibility because the car has a branded title.
NHTSA ODI report, 20230602
2 of 13 total reports mention: fuel/propulsion system.
1 of 13 total reports mentions: visibility.
1 of 13 total reports mentions: power train.
1 of 13 total reports mentions: fuel system, gasoline.
SAFETY TIMELINE
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2021 C300, 2017-2020 AMG C43, and AMG C63 vehicles. The front seat belts might not fully retract to their stowed position.
Remedy: MBUSA will notify owners, and dealers will check the retraction function of the front seat belts and adjust the damping foam within the B-pillars, as necessary, free of charge. The recall began February 26, 2021.
Campaign 21V032000 — check if this car was fixed
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles.
Remedy: MBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021. Owners may contact MBUSA customer service at 1-877-762-8267.
Campaign 21V058000 — check if this car was fixed
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 C-Class, E-Class, E-Class Coupe and Convertible, GLC, CLS, AMG GT 4-door Coupe and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details.
Remedy: MBUSA will notify owners, and dealers will replace the seat position switches, free of charge. Owner letters were mailed May 21, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021040016.
Campaign 21V230000 — check if this car was fixed
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 C300 Cabriolet, C43 AMG Cabriolet, C63 AMG Cabriolet, C63 AMG S Cabriolet, E450 Cabriolet, and E53 AMG Cabriolet vehicles. The rear headrests may be incorrectly mounted to the seatbacks.
Remedy: Dealers will inspect the rear seatback guide bushings and replace them if necessary, free of charge. Owner notification letters were mailed July 16, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
Campaign 21V406000 — check if this car was fixed
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles.
Remedy: The communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022.
Campaign 22V365000 — check if this car was fixed
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2018-2021 CLA-Class, GLE/GLS-Class, A-Class, C-Class, E-Class, E-Class Coupe/Convertible, GLA/GLB-Class, GLC-Class, and CLS-Class vehicles.
Remedy: Dealers will update the rearview camera software, free of charge. Owner notification letters were mailed July 15, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022060007.
Campaign 22V232000 — check if this car was fixed
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 C-Class, E-Class, S-Class, CLS, SL, GT, GLC, GLE, GLS, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details.
Remedy: Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 14, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2023070012.
Campaign 23V445000 — check if this car was fixed
BUY-SMART CHECKLIST
2021 Mercedes-Benz C 300 — pre-purchase inspection
- Test/inspect for engine issues (7 reports on file for this year).
- Test/inspect for fuel/propulsion system issues (2 reports on file for this year).
- Test/inspect for visibility issues (1 reports on file for this year).
- Verify recall 21V032000 (seat belts) has been completed.
- Verify recall 21V058000 (communication, electrical system) has been completed.
- Verify recall 21V230000 (air bags, seat belts, seats) has been completed.
- Verify recall 21V406000 (seats) has been completed.
- Verify recall 22V365000 (communication, electrical system) has been completed.
- Verify recall 22V232000 (back over prevention) has been completed.
- Verify recall 23V445000 (fuel system, gasoline) has been completed.
FAQ
Is the 2021 Mercedes-Benz C 300 reliable?
There isn't enough NHTSA complaint data on file yet to give this model year a verdict.
What are the most common problems with the 2021 Mercedes-Benz C 300?
The most-reported component is engine, accounting for 54% of complaints on file.
How many recalls does the 2021 Mercedes-Benz C 300 have?
7 recalls on file for this model year.
Data updated 2026-07-11 · Complaints are unverified owner reports filed with NHTSA, not independently verified defects. Methodology.