31 11 506 Lowering/raising front axle support (M Coupe)
Special tools required:
Failure to comply with the following instructions may result in the vehicle slipping off the lifting platform and critically injuring other persons.
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.
Observe SAFETY INFORMATIONS for raising the vehicle
In order to avoid damage to vehicle hoist, perform weight compensation on vehicle.
Load spring strut domes with sand bags.
Secure engine in installation position with special tool to prevent it from falling down.
Necessary preliminary work:
- Secure engine in installation position using special tool.
- Remove UNDERBODY PROTECTION .
- Release left and right FRONT WHEEL ARCH COVER FRONT and press to one side (only vehicles from 03/12).
- Remove LOWER SECTION OF STEERING SHAFT FROM STEERING BOX .
Remove deformation element from pedestrian protection (only vehicles from 03/12):
Slacken screw (1) on front pedestrian protection.
Release screws (2) from deformation element and adapter.
Tightening torque 51 11 7AZ/8AZ .
Press deformation element (1) towards the bottom and remove adapter (2) towards the top.
Disconnect plug connection (1) from ride height sensor.
Disconnect plug connection (2) for EH converter Servotronic.
Release screws on coolant pipe (1).
Engage special tool 31 5 251 with a 2nd person helping completely on workshop jack 00 2 030 .
Insert special tools 31 5 253 in telescopic supports of a profile rail pair.
Insert special tools 31 5 256 in telescopic supports of other profile rail pair.
Align special tools 31 5 253 and 31 5 256 to front axle support.
Support front axle support by operating workshop jack 00 2 030 .
Lower front axle support by no more than 10 cm.
Release bolts (1-3).
Tightening torque 31 10 1AZ .
Installation note:
Check thread for damage; if necessary, repair with HELICOIL THREAD INSERT .
Make sure screws are installed in correct positions.
- Bolt (1) M12x90
- Screw (2) M12x145
- Screw (3) M12x53
Tighten screws (1) and then screws (2, 3).