33 31 503 Lowering/Raising Rear Axle Carrier
33 31 503 Lowering/raising rear axle carrierSpecial tools required:
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 tasks:
^ Remove rear wheels
^ F03 only: Remove underguard, side
^ Remove exhaust system
^ Remove propeller shaft from rear axle
^ Expose cable for emergency release up to rear axle carrier
^ Release and disconnect plug connection on actuating unit (EMF)
^ Remove both brake calipers on wheel carrier and tie back
^ Unclip lines for pulse generator and brake pad wear sensor from brackets
^ 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 toothing.
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 with opening in rear suspension subframe.
Align special tool 31 5 253 with crossmember arms on rear suspension subframe.
Version with Dynamic Drive and Integral Active Steering:
Schematic diagram of rear mounting point (link 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.
F03 only:
Remove front compression struts (1).
Remove rear tension struts (2) and carefully lower rear axle carrier.
After installation:
^ Adjust parking brake
