33 31 011 Replacing Rear Axle Support

33 31 011 Replacing rear axle support





Warning!
Risk of injury!
Failure to comply with the following instructions may result in the vehicle slipping off the lifting platform and critically injuring other persons.
Read and observe the information on permissible load distribution in the lifting platform instruction manual.
Load the luggage compartment with a minimum of 100 kg before lowering/removing the rear axle support.
When supporting components, make sure that
^ the vehicle can no longer be raised or lowered
^ the vehicle does not lift off the locating plates on the lifting platform





Necessary preliminary tasks:
^ Remove rear axle final drive
^ Remove rear axle carrier





Remove brake lines.

Remove anti-roll bar

Version with Dynamic Drive: Disconnect control lines for oscillating motor of rear axle from rear axle carrier.

Remove actuator unit (parking brake).

Remove both brake discs.

Remove ride-height sensor(s).





Remove both swinging arms on rear axle support.

Remove both wishbones on rear axle support.

Remove both guide arms on rear axle carrier.

Remove both wheel carriers with output shaft, swinging arm and suspension arms.





Take rear axle support down from special tool with assistance of a 2nd person and set down on a suitable surface.

Installation:
Use previous rear axle support as a template for modifying or replacing small parts.





After installation:
^ Activate and fill air suspension system
^ Carry out ride-height calibration
^ Bleed braking system
^ Perform chassis alignment check
^ If necessary, carry out initial Dynamic Drive operation