Procedures
Remove/Install Jacket Tube
CAUTION: See notes on self-locking nuts and bolts
1 Position steering wheel horizontal (front wheels in straight-ahead position)
CAUTION: The steering wheel must not be turned with the steering coupling (25) detached otherwise the clock spring contact will be destroyed.
2 Connect quiescent current retention unit
DANGER:
- Risk of explosion from explosive gas. Risk of poisoning and caustic burns from swallowing battery electrolyte. Risk of injury through burns to skin and eyes from battery acid or when handling damaged lead-acid batteries
- No fire, sparks, naked flames or smoking
- Wear protective gloves, acid-resistant clothing and safety glasses Pour battery electrolyte only into suitable and appropriately marked containers.
3 Disconnect ground cable of battery
NOTE:
- Turn key in electronic ignition switch EIS into position "0" Key cannot be withdrawn
- Vehicle with code (889) Keyless-Go: Switch off engine, remove Keyless Go cards from the vehicle and keep outside the range of the transmitter.
- Ensure that ground cable will not come into renewed contact with the battery terminal as you are working
- Installation: Read out fault memory after connecting, adjust time display on combination instrument, code radio, normalize power window and activate steering angle sensor
- Vehicles with stationary heater adjust time display on stationary heater
CAUTION:
- See instructions for performing repair, body work and welding on vehicles with airbags and ETR units
4 Remove lower engine compartment paneling (at rear)
5 Detach exhaust shield near lower steering shaft (80a)
6 Unscrew bolt connecting steering coupling to steering shaft (25a) from steering coupling (25) at lower steering shaft (80a)
7 Insert a suitable tool in the hole in steering coupling (25) and pull lower steering shaft (80a) together with locking plate (25f) upwards and out of steering coupling (25)
CAUTION: Do not counter by holding the rubber boot (85a) or the temperature-resistant plastic disk on the lower steering shaft (80a). Do not use force (hammer blows, excessive leverage) as the lower steering shaft (80a) is sensitive to lateral forces.
NOTE: Installation: Replace locking plate (25f) with self-locking nut
- Turn rack-pinion steering to center position.
- Watch the tab on the steering coupling (25) and the groove in the lower steering shaft (80a) while sliding the lower steering shaft (80a) all the way into the steering coupling (25)
8 Pull lower steering shaft (80a) up and out of steering coupling (25)
CAUTION: Do not counter by holding the rubber boot (85a) or the temperature-resistant plastic disk on the lower steering shaft (80a). Do not use force (hammer blows, excessive leverage) as the lower steering shaft (80a) is sensitive to lateral forces
NOTE: Installation: Replace locking plate (25g) with self-locking nut
9 Unscrew hexagon nuts on retaining plate (85b) for rubber boot (85a)
NOTE: Installation: Ensure rubber boot (85a) is seated properly
10 Remove steering wheel
11 Remove jacket tube switch module (34)
12 Mark steering column with respect to jacket tube (71) (arrow)
13 Remove instrument cluster
14 Remove jacket tube cover (99)
15 Unclip connector (a) on jacket tube (71)
16 Remove cover below instrument panel (left)
NOTE: Model 220 only.
17 Disconnect connectors for longitudinal adjustment forward/back motor (M20x1), height adjustment up/down motor (M20x2) and steering column driving position microswitch (M20x3)
18 Remove both heating/ventilation cross ducts
19 Detach reinforcement brace (98)
NOTE: Installation: The steering column must be in extended all the way when the bolts are tightened.
20 Unscrew lower bolt (91b) of electric steering column adjustment (80) at body
21 Unscrew upper bolts (91a) of electric steering column adjustment (80) at body
NOTE: Installation: Do not tighten nuts and bolts (the jacket tube (71) must remain adjustable).
- Tighten upper bolts (91a) of electric steering column adjustment first.
22 Remove jacket tube (71) with lower steering shaft (80a)
CAUTION: Do not use force, as the lower steering shaft (80a) is sensitive to forces applied from the side.
NOTE: Installation: Pay attention to the marking (arrow) for the straight-ahead position on the jacket tube (71) and steering column.
23 Render electrical system operational
NOTE: Perform basic programming (normalize windows and sliding roof, etc.).
24 Install in the reverse order.