2021 Mercedes-Benz S-Class: owner complaints and recalls
Analysis of 33 owner complaints filed with NHTSA and 0 recall campaigns. Updated 2026-07-25.
33
Complaints
0
Recalls
2
Crash reports
0
Fire reports
3
Injuries
218.2
Severity index
Severity index 218.2 - High. This weights crashes, fires, injuries and fatalities per 100 complaints; see methodology.
What actually fails
| Component | Complaints | Share of complaints citing it |
|---|---|---|
| ELECTRICAL SYSTEM | 10 | 30.3% |
| WHEELS | 6 | 18.2% |
| FORWARD COLLISION AVOIDANCE | 5 | 15.2% |
| ENGINE AND ENGINE COOLING | 5 | 15.2% |
| UNKNOWN OR OTHER | 4 | 12.1% |
| ENGINE | 3 | 9.1% |
| LANE DEPARTURE | 3 | 9.1% |
| SERVICE BRAKES | 3 | 9.1% |
The single most-reported system is ELECTRICAL SYSTEM, cited in 10 of 33 complaints (30.3%). One complaint can name several systems, so these shares overlap and do not total 100%.
Complaints filed per year
| Year | Complaints |
|---|---|
| 2021 | 6 |
| 2022 | 7 |
| 2023 | 5 |
| 2024 | 5 |
| 2025 | 7 |
| 2026 (year to date) | 3 |
Complaint volume is broadly steady year over year.
Source. US National Highway Traffic Safety Administration public complaint and recall APIs (api.nhtsa.gov), retrieved 2026-07-25. Complaints are unverified consumer reports; volume is influenced by how many units were sold and how long the vehicle has been on the road. Not affiliated with NHTSA or any manufacturer.