2018 Mercedes-Benz GLC Pre-Purchase Inspection Checklist
Known Issues — 2018 Mercedes-Benz GLC
MODERATE
9G-Tronic shudder under light throttle at highway on-ramp speeds
CRITICAL
Air suspension compressor failure on AIRMATIC models
MODERATE
GLC63 AMG M177 V8 oil leaks from valve cover gaskets
MODERATE
Oil consumption in 2.0L turbo engine
MODERATE
Front brake rotor warping causing pedal pulsation
MINOR
COMAND touchpad unresponsive after infotainment update
What to Inspect
- Inspect GLC63 valve covers and oil pan area for seeps
- Test transmission shudder in highway merging conditions
- Check air suspension balance on all four corners
- Verify oil level and track any consumption signs
- Test brake pedal for pulsation under moderate stops
- Test COMAND touchpad and all physical controls
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Service A (oil & filter) | every 10,000 miles | $280-$380 |
| Service B (full inspection) | every 20,000 miles | $550-$800 |
| Spark plugs replacement (V8) | every 30,000 miles | $500-$700 |
| Transmission fluid service | every 40,000 miles | $350-$500 |
| Brake pads and rotors (front) | every 25,000-35,000 miles | $700-$1,050 |
| Valve cover gaskets (GLC63) | as needed | $700-$1,100 |
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