Steering column design
25 - Steering gear input unit; 25d - Self-locking nut; 25f - Casing; 32 - Steering wheel; 36h - Shift lock (AT); 71 - Shirt; 71b - Lower nuts; 80 - Lower shaft; 80a - Dust cover; 91a - Upper bolts; A45 - Spiral contact drum; S4 - Combined steering column switch; a - Switch wiring connector; b - Contact connector; c - Transponder
Note: All self-locking bolts and nuts must be replaced!
1. The design of the steering column is shown in the illustration, to which all references in the text refer.
2. Disconnect the negative cable from the battery.
3. Remove the steering wheel (32) and the spiral contact drum (A45) (see Section Removal and installation the steering wheel and the steering column spiral contact drum).
4. Remove the combination switch (S4) (see Chapter On-board electrical equipment).
5. Remove the instrument cluster (see Chapter On-board electrical equipment).
6. Disconnect the connector (a) of the adjusting lever.
7. On models with AT, remove the shift lock (36h) from the steering column lock - squeeze the latches and pull the lock back, removing it from the mounting clips.
8. Disconnect the contact connector (c) and remove the transponder.
9. Release the lock and disconnect the contact connector (b).
10. Release the fastening clips of the combined steering column switch assembly (S4) and remove the latter from the steering column housing (71).
11. Remove the cover on the left under the instrument panel.
12. Loosen the lower nuts (71b) and unscrew the upper bolts (91a) securing the jacket (71).
13. Lift up and remove the shirt (71).
14. Loosen the self-locking nut (25d) of the mounting bolt and separate the lower steering column shaft (80a) from the input unit (25) of the rack and pinion - do not use force, if necessary, slightly loosen the lock with a screwdriver!
Article was borrowed from the website mercedesman
15. Remove the steering shaft (80a) by pushing it upwards.
16. Check the condition of the shaft (80a), replace it if necessary.
17. Replace the damaged boot (80b) - make sure the boot is seated correctly.
18. If the jacket needs to be replaced, remove the ignition lock cylinder (see Section Removal and installation the ignition lock cylinder).
19. Installation is carried out in the reverse order - make sure that all components are seated correctly. First, tighten all the fasteners so that the position of the jacket can be adjusted, then, having achieved the required result, tighten the upper bolts with the required force first, then the lower nuts. Make sure that the contact connectors are securely fixed.