Removal and Replacement

Removal:





1. Turn ignition key to "0" position, disconnect battery negative terminal and cover.
2. Remove floor mat in left-hand front footwell.
3. Open flap on foot rest and pull off red 10-pin plug connection of triggering unit on the back.
4. Remove cover on shift lever.





5. Remove radio or cover on radio cutout.
6. Turn plastic clips on foot rest by 90° and pull out.
7. Disconnect foot rest.
8. Pull out connection cable for triggering unit on cable duct along side member.





9. Open cable straps on driver's seat console front.





10. Open cable straps and clip on floor shift and pull out connection cable for triggering unit.





11. Screw out mounting bolts of triggering unit with special tool.
12. Remove triggering unit through radio cutout.

Installing:





13. Screw on triggering unit.

CAUTION: Arrow on triggering unit must point in driving direction.





14. Connect red 10-pin plug connection (arrow) with cable harness.
15. Connect battery, turn ignition key to position "1" and test system by means of the RS warning lamp.
16. Turn ignition key to position "0". Disconnect battery negative terminal and cover.
17. Disconnect red 10-pin plug connection (arrow).





21. Tie string to red 10-pin plug of control unit and route connecting cable through the front wall pillar with the aid of this string.
18. Test system with tester, See "Test Instructions for Tester...", which is contained within the article at "Test Program, Air Bag and Belt Tensioner (up to 09/87) and Air Bag 1/3, Tests". [1][2]Component Tests and General Diagnostics

NOTE: Test steps 2, 6 and 7 found under "Test Instructions for Tester..." are no longer required with the installation of air bag 1/3.

19. Continue installation in the reverse sequence.
20. Check system with RS warning lamp.
- Connect test coupling/plug connection, airbag, 10-pin (X29/9).
- Switch on ignition. The RS or SRS warning lamp must go out after approx. 4 s.

NOTE: After the installation of a modified airbag control unit (airbag 1/3) part no. 004 820 11 10 supplementary jobs will be necessary:

Table:

1. In addition to modified control unit install either line A or line B (table) depending on which control unit was installed in the vehicle.
2. Additional Work:









- Remove voltage transformer (N24) (not present in all vehicles) and insulate plug connector (3). Service and Repair
- Remove reserve power source (C1) and insulate plug connector (2). Service and Repair
- Fasten cables to existing cable harness using cable straps.
- Test airbag system using airbag tester, part no. 126 589 10 21 00.