This TSB applies to all models/years of Mercedes-Benz vehicles. Self-locking screws/bolts with thread-lock must always be replaced.

As described in the WIS-net document AH00.00-N-0001-01A, it is mandatory that the nut threads on the axle mount be re-cut and blown out with compressed air.

All self-locking fasteners must be replaced once removed. Female threads that captured self-locking bolts (with thread-lock) must be cleaned out with a tap/thread chaser to remove any adhesive residue.

All self-locking fasteners must be replaced once removed. Female threads that captured self-locking bolts (with thread-lock) must be cleaned out with a tap/thread chaser to remove any adhesive residue.

Adhesive residue in the threads affects the strength of the bolt, even when the correct tightening torque and angle is applied. The bolt may bend and eventually break.:

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