2023 Mercedes-Benz GLS Pre-Purchase Inspection Checklist
Known Issues — 2023 Mercedes-Benz GLS
CRITICAL
E-ACTIVE BODY CONTROL hydraulic pump faults on equipped models
MINOR
MBUX software instability — latest OTA generally resolves
MODERATE
48V mild hybrid system fault codes on some GLS450 examples
MODERATE
9G-Tronic shudder at light throttle in traffic
MODERATE
OTA update failures requiring dealer reflash
MODERATE
GLS63 front cam cover oil seeps at medium mileage
What to Inspect
- Check E-ACTIVE BODY CONTROL status on startup and during drive
- Verify MBUX is on latest OTA version
- Check 48V system fault codes
- Test 9G-Tronic at 30-50 mph light throttle
- Inspect GLS63 engine for oil seeps
- Confirm all OTA updates applied without errors
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Service A (oil & filter) | every 10,000 miles | $420-$620 |
| Service B (full inspection) | every 20,000 miles | $950-$1,500 |
| Air spring replacement (each) | as needed | $1,300-$2,400 |
| Transmission fluid service | every 40,000 miles | $550-$800 |
| Brake pads and rotors (front) | every 25,000-35,000 miles | $1,050-$1,750 |
| 48V mild hybrid battery check | every 40,000 miles | $300-$500 |
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