Symptoms
Harsh or delayed shifts, limp mode, or ATF wicking into the wiring at the gearbox connector.
The fix, step by step
- Drop the pan, replace the filter and fluid, and check the 13-pin connector (203-540-02-53) for leaks.
- VRP says to check the conductor plate too in many cases.
- Use the correct Mercedes-spec ATF and fill by temperature.
Tools & part numbers
- ATF
- filter and pan gasket
- 13-pin connector (203-540-02-53)
- dipstick tool
Where to buy the parts
FUCHS 722.6 13-pin connector service kitFCP Euro ↗Amazon ↗
FUCHS 722.6 ATF service kit (fluid, filter, gasket)FCP Euro ↗Amazon ↗
722.6 conductor plate service kitFCP Euro ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Mercedes-Benz G 55 AMG 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.