33 31 503 Lowering/Raising Rear Axle Carrier

33 31 503 Lowering/raising rear axle carrier





Special tools required:
^ 00 2 030
^ 31 5 251
^ 31 5 253
^ 31 5 255





Important!
Before lowering rear axle support:
Observe safety instructions on raising the vehicle.
In order to avoid damage to lifting platform, perform weight compensation on vehicle.
Load luggage compartment with sand bags.

Necessary preliminary work:





^ Remove rear wheels
^ Remove exhaust system
^ Remove propeller shaft from rear axle
^ Remove both brake-caliper supports and tie up.
^ Unlock plug connections Integral_Aktivlenkung and disconnect
^ Unclip lines for pulse generator and brake pad wear sensor from holders
^ Unlock and disconnect plug connection on both ride height sensors
^ Remove both spring struts from wheel carrier





Engage 31 5 251 with a 2nd person helping completely on workshop jack 00 2 030.

Insert special tools 31 5 255 in telescopic supports of a profile rail pair.

Note:
In a profile rail pair two profile rails are connected to each by gearing.

Insert special tools 31 5 253 in telescopic supports of other profile rail pair.

Version without Dynamic Drive:
The jacking points on the left side are shown.





Align special tool 31 5 255 to opening in rear axle support.

Align special tool 31 5 253 to cross member arms on rear axle support.





Version with Dynamic Drive and Integral active steering:

Schematic diagram of the rear mounting point (left side) for special tool 31 5 253.

The front mounting point for special tool 31 5 255 is identical - version without Dynamic Drive.





Release screws (4).

Tightening torque 33 33 1AZ.

Installation:
Arrow (1) on stop plate (2) must point in direction of travel!

Remove front compression struts (3).

Carefully lower rear axle carrier.

After installation:





^ Perform start-up Integral Active Steering with the aid of the diagnosis system (refer to Service function/Deflection test)