AI DamageMercedes-Benz S 450 4matic: problems, complaints, bulletins
Summary for the Mercedes-Benz S 450 4matic across 3 model years: 0 owner complaints and 26 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Powertrain | 0 | 0 | 24 |
| Electrical system | 0 | 0 | 12 |
| Structure | 0 | 0 | 12 |
| Suspension | 0 | 0 | 12 |
| Fuel/propulsion system | 0 | 0 | 6 |
| Visibility | 0 | 0 | 6 |
| Engine | 0 | 0 | 5 |
| Steering | 0 | 0 | 4 |
| Exterior lighting | 0 | 0 | 3 |
| Service brakes | 0 | 0 | 3 |
| Other | 0 | 0 | 3 |
What to check before buying
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
- Suspension. Wheel alignment, control arms, subframe, even tire wear.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Complaint Clanking noise from the area of the speakers in the doors
- Complaint Customer complaints relating to automatic transmission 725.0 (NAG3 Classic /9G‑TRONIC automatic…
- Complaint Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE
- Complaint Noises in the steering column area when steering. See example file in the attachments area
- Complaint Only vehicles with a variable transfer case are affected
- Complaint Customer complaints relating to automatic transmission 725.0 (NAG3 Classic / 9G‑TRONIC automatic…
- Complaint During part of the steering movement, it feels heavier or more difficult to steer in the same…
- Dear Mercedes-Benz Owner
- Complaint Tailgate opens unintentionally
- Complaint A popup is seen on the HU with the message "data connection temporarily not available"
- Complaint Clanking noise from the area of the speakers in the doors
- Complaint This document is intended as a pre-case diagnostic reference for transmission related concerns
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.