Symptoms
ABS and stability-control warnings; on affected 2019–2021 trucks the front-axle wiring harness can rub through against the auxiliary oil cooler.
The fix, step by step
- Run the VIN through NHTSA or Mercedes (MBUSA campaign 2023030005).
- The dealer inspects the harness, sleeves it or replaces it.
- If you’re underneath anyway, look at the harness routing near the cooler for chafe marks.
Tools & part numbers
- VIN
- flashlight for inspection
- dealer appointment
Where to buy the parts
Hunting a used or discontinued part? Search eBay Motors for Mercedes-Benz G-Class (second generation) parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.