2021 Mercedes-Benz GLC Pre-Purchase Inspection Checklist
Known Issues — 2021 Mercedes-Benz GLC
MODERATE
9G-Tronic transmission shudder during light throttle cruise
MODERATE
Air suspension compressor failure on AIRMATIC models
MODERATE
Oil consumption in 2.0L turbo above acceptable range
MODERATE
Front brake rotor warping under repeated hard stops
MINOR
COMAND map data outdated — update costs extra
MODERATE
Rear hatch power liftgate motor failure
What to Inspect
- Test power liftgate open and close cycle multiple times
- Check oil level and review service records for top-ups
- Drive at 30-60 mph light throttle for transmission shudder
- Inspect all four air spring corners for height uniformity
- Test brake pedal for pulsation under moderate stops
- Scan full vehicle for stored and active fault codes
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Service A (oil & filter) | every 10,000 miles | $280-$400 |
| Service B (full inspection) | every 20,000 miles | $600-$850 |
| Spark plugs replacement | every 60,000 miles | $300-$700 |
| Transmission fluid service | every 40,000 miles | $400-$550 |
| Brake pads and rotors (front) | every 25,000-35,000 miles | $700-$1,050 |
| Power liftgate motor | as needed | $400-$700 |
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