Symptoms
Slow inflation, one axle losing pressure overnight, the compressor running a long time, hissing at a hub.
The fix, step by step
- Soapy-water test the tanks, lines and fittings, then the rotary seals at each hub.
- Replace the seals and lines that fail, re-test at road and sand pressures, and check the gauges against a handheld one.
- One Bring a Trailer truck had its CTIS seals and lines replaced by the US LeTech distributor.
Tools & part numbers
- Spray bottle and soap solution
- calibrated tyre gauge
- line wrenches
Where to buy the parts
GwagenParts.com search: 6x6GwagenParts.com ↗
GwagenParts.com search: portalGwagenParts.com ↗
Hunting a used or discontinued part? Search eBay Motors for Mercedes-Benz G 63 AMG 6×6 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.