33 31 000 Removing and Installing Complete Rear Axle Support

33 31 000 Removing And Installing Complete Rear Axle Support

Special tools required:







WARNING:
Danger of injury.
Failure to comply with the following instructions may result in the vehicle slipping off the lifting platform and critically injuring other persons.
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 vehicle hoist.







IMPORTANT:
Observe safety information for raising the vehicle
In order to avoid damage to vehicle hoist, perform weight compensation on vehicle.

IMPORTANT:
Version with ARS:
Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Do not draw off hydraulic fluid (risk of contamination).
Close off pipe connections with plugs 32 1 270







Necessary preliminary tasks:
- Remove rear wheels.
- Remove cross reinforcement. (F12)
- Remove exhaust system.
- Remove and tie back propeller shaft on rear axle final drive.
- If necessary, disconnect pressure line for ARS in area of right compression strut. (F10/F12/F13)
- Unclip and disconnect cable for pulse sensor and brake pad wear sensor.
- Remove and tie up both brake calliper supports at the wheel carrier.
- Remove both spring struts from wheel carrier.







Unfasten plug connection (1) and disconnect.







Graphic shows the right-hand side; the procedure for the left hand-side is identical.
Remove cable holder (1) on toe arm.

Installation note:
Replace faulty cable clips.







Version with integral active steering:
Unlock and disconnect plug connections (1) from steering.
Release screw (2) and remove grounding cable.
Tightening torque 33 34 4AZ.







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

NOTE: In a profile rail pair, two profile rails are connected to one another by gearing.







Version without ARS and integral active steering:
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.

IMPORTANT:
The centre of gravity of the rear axle must be positioned centrally over the workshop jack.
Use tensioning strap 33 5 206 to tie the rear axle support to special tool 31 5 251.







Version with ARS 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 ARS.

IMPORTANT:
The centre of gravity of the rear axle must be positioned centrally over the workshop jack.
Use tensioning strap 33 5 206 to tie the rear axle support to special tool 31 5 251.







Release screws (4).
Tightening torque 33 33 1AZ.
Remove front compression strut (3).
Carefully remove rear axle support.

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







After installation:
For version with ARS: (F10/F12/F13)
- Perform start-up of ARS.
- Check line connections for leak tightness