General Repair Information

General Repair Information

The maximum possible care, cleanliness and proper tools are essential to ensure satisfactory and successful steering gear repairs. Understandably, general safety guidelines apply when performing repairs.

A series of applicable general notes for individual repair procedures - otherwise listed several times at many points in the repair information - has been collected here. They apply for this repair information.

Steering Gear

• Thoroughly clean connecting points and their surrounding areas before loosening.

• When installing the steering gear, make sure the centering sleeves are correctly seated between the bracket and steering gear.

• Place removed parts on a clean surface and cover to prevent contamination. Use foil or paper. Do not use fluffy cloths!

• Only install clean components: Only unpack replacement parts immediately prior to installation.

• Use only lubricants and sealants marked with part numbers.

• Carefully cover over opened components or seal, if repairs are not carried out immediately.

• As of Model year (MY) 2009 the generation 3 steering gear is being installed. For information on the differences between generation 2 and generation 3, refer to --> [ Differences Between Generation 2 and Generation 3 Steering Gears ] Description and Operation.

Gaskets and Seals

• Always replace seals and gaskets.

• After removing the seals, inspect the contact surface on housings and shafts for burrs and damage and repair if necessary.

• Remove all residual sealant of fluid seals from sealing surfaces, no sealant residue must enter the steering gear housing when doing this.

Bolts and Nuts





• Loosen and tighten the bolts and nuts for the covers and housings in a diagonal sequence.

• Do not tilt, and loosen and tighten especially sensitive parts in diagonal manner in stages.

• Tightening specifications for non-lubricated bolts and nuts are given.

• Always replace self locking nuts and bolts.

Electrical Components

Surely everyone has been shocked at one time or another when coming into contact with a metal object. The reason for this is the buildup of static electricity in the human body. This charge can lead to functional problems by touching the electrical components of the steering gear.





- Touch a grounded object - for example a water pipe or a vehicle hoist - before working on electrical components. Do not make direct contact on connector terminals.

Guided Fault Finding, On Board Diagnostic (OBD) and Test Instruments





• Before performing repairs on the electromechanical steering gear, the malfunction cause must be determined as exactly as possible using the vehicle diagnostic, testing and information system (VAS 5051B) in the operating modes "Guided Fault Finding", " Vehicle Self-Diagnosis" and "Test Instruments".