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November 21, 2024 Service bulletin

Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering...

Mercedes-Benz technical service bulletin LI33.20-P-078406 for 2012-2015 Mercedes-Benz ML350, 2016-2018 Mercedes-Benz GLE 350 and 2013-2017 Mercedes-Benz GL450 and others.

Bulletin number
LI33.20-P-078406
Component
Wheels
Summary
Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements. Sound file attached for comparison. NOTE: Steering functionality is not affected. For 192 and 232: Only affects vehicles up to FIN vehicle identification end number. If vehicle falls outside of FIN range, create a TIPS case. Model series 192: xxx xxx xx 002 876 Model series 232: xxx xxx xx 022 312 Cause Contact area between wheel bearing and steering knuckle. Remedy 1. Perform Operation A and evaluate by testing vehicle. 2. If noise is still present, perform Operation A again. 3. If noise is still present after re-testing, perform Operation B. Operation A: 1. Clean contact surfaces of wheel bearing and steering knuckle with brake cleaner (see areas marked blue in pictures "2.jpg" and "3.jpg"). NOTE: The front area of the wheel bearing and the seals must not come into contact with the cleaner, otherwise, the sealing rings will be damaged. 2. Clean threads of wheel bearing mounting. 3. Thinly coat contact surfaces of wheel bearing and steering knuckle with Molykote (annular joint grease) (see areas marked blue in pictures "2.jpg" and "3.jpg"). Operation B: 1. Replace steering knuckle. 2. Wheel bearings do not need to be replaced.

Owners of these vehicles have filed 31 complaints in the wheels category.

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