Symptoms
Gear oil on the inner front wheels, a gear-oil smell, oil on a caliper or rotor, brakes pulling to one side.
The fix, step by step
- Replace both front axle seals even if only one is leaking, and check the shafts for scoring.
- If oil reached the brakes, replace the pads and resurface or replace the rotors — contaminated pads are a safety issue.
Tools & part numbers
- Genuine axle seals (both sides)
- seal driver
- gear oil
- brake pads and rotors if contaminated
Where to buy the parts
Genuine Mercedes front axle shaft seal 009 997 28 47FCP Euro ↗Amazon ↗
Red Line 75W-90 GL-5 gear oil (listed for 2009–2014 G 550)FCP Euro ↗Amazon ↗
Hunting a used or discontinued part? Search eBay Motors for Mercedes-Benz G 550 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.