Repair Information, AWD
Repair Information, AWD
When installing waxed components, contact surfaces must be cleaned. Contact surfaces must be free of wax and grease.
Torque specifications for unlubricated bolts and nuts are given.
Always replace self-locking nuts and bolts.
Welding or straightening operations are not permitted on load-bearing or wheel-controlling components.
Always avoid the following actions with coil springs: Striking with a hammer, welding beads, applying color identification later.
Do not perform any welding or grinding (separating work) in coil spring or suspension strut area! Cover coil spring or suspension struts if necessary.
When loosening, removing or installing hydraulic, pneumatic or electrical line, always make a sketch or take a picture. Doing so records the original installation locations.
If the cable ties, brackets or mounting elements were removed during the repair procedure, they must be installed at their original location.
Lightly coat the splines on the outer joint with assembly paste before installing the outer joint into the wheel hub. Allocation, refer to the Electronic Parts Catalog (ETKA).
Never allow the drive axle just to hang loose under the vehicle or to bend them at the joints.
Vehicles without a drive axle must not be moved, otherwise the wheel bearing will be damaged. If vehicle does have to be moved, always note the following points:
- Install an outer joint in place of the drive axle.
- Tighten the outer joint to 120 Nm (twelve-point bolt) or 200 Nm (hex bolt).
Tightening the threaded connection between the drive axle and flange shaft:
• First diagonally tighten all six bolts to 10 Nm. Then diagonally tighten them again to the tightening specification.
Loosening the connection between the drive axle and wheel hub:
• Refer to => [ Drive Axle Hex Bolt Connection, Loosening and Tightening ] Drive Axle Hex Bolt Connection, Loosening and Tightening.
• Refer to => [ Drive Axle Twelve-Point Bolt with Ribs, Loosening and Tightening ] Drive Axle Twelve-Point Bolt With Ribs, Loosening and Tightening.
Bonded rubber bushings can only be turned to a limited extent. Therefore tighten threaded connections at components with bonded rubber bushings only when wheel bearing housing has been lifted (curb weight position). Refer to => [ Rear Suspension, Lifting to Curb Weight Position ] Rear Suspension, Lifting to Curb Weight Position.
Always replace bonded rubber bushings on both sides of vehicle.
• If the vehicle axle must still be aligned, every bolt and nut that must be loosened for adjustment is only tightened to torque specification. Tighten the bolts and nuts to the specified additional tightening angle after the alignment/adjustment is complete.
• The subframe was changed from aluminum to steel as of MY 08.
• The wheel bearing housing was changed from steel to aluminum as of MY 08. It is permissible to install an aluminum wheel bearing housing on one side of the vehicle and a steel wheel bearing housing on the other side. Allocation, refer to the Electronic Parts Catalog (ETKA). Only aluminum wheel bearing housing are available as a replacement part; therefore when exchanging, there are certain parts which must be exchanged and/or additionally installed. Allocation, refer to the Electronic Parts Catalog (ETKA).
If vehicle will be driving on the streets, all bolts and nuts must be tightened properly!