2021 Mercedes-Benz A-Class Pre-Purchase Inspection Checklist
Known Issues — 2021 Mercedes-Benz A-Class
MODERATE
7G-DCT transmission jerk from stops in normal driving mode
MINOR
MBUX software stability issues resolved via OTA update
MODERATE
Oil consumption in 1.3L engine above normal range
MINOR
Rear brake wear sensor false trigger at low mileage
MINOR
Active parking assist sensor calibration loss
MODERATE
Catalytic converter efficiency codes at higher mileage
What to Inspect
- Test dual-clutch behavior from rest in Normal and Comfort mode
- Check for check engine light or catalyst efficiency codes
- Verify MBUX OTA version is current
- Test active parking assist sensors on all sides
- Check oil level relative to last service date
- Run full fault code scan
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Service A (oil & filter) | every 10,000 miles | $220-$320 |
| Service B (full inspection) | every 20,000 miles | $450-$650 |
| Spark plugs replacement | every 60,000 miles | $200-$350 |
| Dual-clutch transmission fluid service | every 40,000 miles | $300-$450 |
| Brake pads and rotors (front) | every 30,000-40,000 miles | $500-$800 |
| Cabin air filter | every 20,000 miles | $60-$100 |
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