Symptoms
Bubbling at the tailgate lower edge, door bottoms and sills; scale on the rear frame tubes and strut mounts.
The fix, step by step
- Wire-brush or blast back to sound metal, treat and paint, or cut in repair panels where needed.
- Inject cavity wax into doors and frame rails, keep drain paths clear and wash off road salt after winter.
Tools & part numbers
- Wire wheels or blaster
- rust converter and primer
- cavity wax with extension wand
- welder for panel repairs
Where to buy the parts
Eastwood Internal Frame Coating (cavity wax for frame rails)Eastwood ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Mercedes-Benz G 500 4×4² 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.