481019 Removing and installing steering wheel
WM 481019 Removing and installing steering wheel
Tools
Preliminary work
Preliminary work for removing and installing steering wheel
WARNING
Incorrect handling of airbag units
- Triggering of airbag unit
- System faults can occur
-> Switch off ignition and remove ignition key.
-> A voltage supply (e.g. battery charger) must not be connected to the external power supply/jump-lead starting terminals.
-> Disconnect the battery and insulate the ground strap so that all contact with a ground carrier is avoided.
-> Wait 1 minute after disconnecting the battery.
-> Only pull off connector on the triggering unit after the waiting time has elapsed.
-> Make sure that no foreign objects are located in front of the airbag unit during installation.
-> Replace damaged parts during removal.
-> Always position the airbag unit in such a way that the airbag opening is facing upwards.
-> If removed for an extended period, the airbag unit must be stored in a safe place.
-> Airbag units must not come into contact with grease, oil, detergents, liquids, or similar substances.
-> Do not expose airbag units to temperatures above 90°.
-> Do not remove the short-circuit spring on the plug-in contacts.
-> Ignition and preparations may only be carried out by skilled staff, supervised by a second responsible person.
-> Before disposal, the airbag unit must be rendered harmless by electrical ignition performed in accordance with all precautionary measures, thereby preventing it from being used incorrectly.
1. Disconnect the battery. -> 270619 Removing and installing battery - section on "Removing" Removal and Replacement
2. Remove driver's airbag unit -> 695819 Removing and installing driver's airbag unit - section on "Removing" 695819 Removing and installing driver's airbag unit.
Removing steering wheel
1. Turn wheels to straight-ahead position.
Information
- Always release and disconnect the plug connections for steering wheel heater cables and airbag cables before removing the steering wheel.
2. If the vehicle has a heated steering wheel: release and pull off plug connection for steering wheel heater -1-.
Pulling off plug connections
3. Release and pull off plug connection for airbag wire harness -2-.
Information
Immediately after unscrewing the fastening screw and before removing the steering wheel, it is essential to mark the position of the steering wheel and steering column -2-.
Marking
When reinstalling, this ensures that the steering wheel as well as the airbag spring are fitted back in the same position on the steering column.
4. Unscrew fastening screw -1- with multiple-tooth socket-wrench insert Nr.32.
Multiple-tooth screw
5. Mark position of steering wheel.
6. Remove steering wheel.
Installing steering wheel
Information
- Always observe the correct tightening torques!
- Wheels straight ahead and observe previously applied markings!
- Airbag unit must lock with an audible click! Check by pulling at airbag unit!
- Always replace the multiple-tooth screw!
- Observe correct tightening torque -> 4X00IN Tightening torques for steering [1][2]Specifications.
1. Installation is performed in reverse order to removal.
2. When positioning the steering wheel, make sure that the marking -2- between the steering wheel and steering column is aligned.
Marking
3. Check the airbag unit before installation
- Is the compression spring -1- positioned correctly (compression spring seating in spring guide!)?
- When you slide the securing clip -2- up evenly (against the spring force) and then let it go, the securing clip must be pressed down again evenly.
Securing clip for cover (shown as an example)
Subsequent work
Subsequent work for removing and installing steering wheel
1. Install driver's airbag unit -> 695819 Removing and installing driver's airbag unit - section on "Installing" 695819 Removing and installing driver's airbag unit.
2. Connect the battery. -> 270619 Removing and installing battery - section on "Installing" Removal and Replacement