2021 Mercedes-Benz S-Class Pre-Purchase Inspection Checklist
Known Issues — 2021 Mercedes-Benz S-Class
MODERATE
MBUX Hyperscreen software instability on early production units
MODERATE
48V mild hybrid system fault codes on S500 and S580
MODERATE
Air suspension compressor faults on AIRMATIC models
MODERATE
Rear-axle steering calibration loss after wheel service
MODERATE
OTA update failures requiring dealer to reflash modules
MINOR
Burmester 4D audio system subwoofer distortion at high volumes
What to Inspect
- Test MBUX Hyperscreen fully — all zones, voice assistant, navigation
- Check 48V system fault history
- Verify all OTA updates are applied and MBUX version is current
- Test rear-axle steering at parking and highway speeds
- Verify AIRMATIC ride height consistency
- Test Burmester audio at full volume for distortion
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Service A (oil & filter) | every 10,000 miles | $450-$650 |
| Service B (full inspection) | every 20,000 miles | $1,000-$1,600 |
| Air spring replacement (each) | as needed | $1,400-$2,400 |
| Spark plugs (V8, 16 plugs) | every 30,000 miles | $900-$1,400 |
| Brake pads and rotors (front) | every 25,000-35,000 miles | $1,100-$1,800 |
| 48V mild hybrid battery check | every 40,000 miles | $300-$500 |
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