Steering Lock Removal/Installation Guidelines (46/74)

STEERING LOCK REMOVAL/INSTALLATION GUIDELINES

TECHNICAL SERVICE BULLETIN

MODELS 124, 126, 201 - STEERING LOCK

Model(s): 1981-1983 Mercedes-Benz 380 SEL; 1981-1985 Mercedes-Benz 300 SD; 1982-1983 Mercedes-Benz 380 SEC; 1984-1985 Mercedes-Benz 380 SE, 500 SEC, 500 SEL; 1984-1989 Mercedes-Benz 190 D; 1984-on Mercedes-Benz 190 E; 1986-1987 Mercedes-Benz 300 SDL; 1986-1991 Mercedes-Benz 420 SEL, 560 SEC, 560 SEL; 1986-on Mercedes-Benz 300 E; 1987 Mercedes-Benz 300 D, 300 TD; 1987-1989 Mercedes-Benz 260 E; 1988-1991 Mercedes-Benz 300 SE, 300 SEL; 1988-on Mercedes-Benz 300 CE, 300 TE; 1990-1991 Mercedes-Benz 350 SDL; 1990-on Mercedes-Benz 300 D, 300 E 4MATIC, 300 TE 4MATIC; 1991 Mercedes-Benz 350 SD; 1992-on Mercedes-Benz 400 E, 500 E

Group: 46 - Steering System

Bulletin No.: 46/74

Date: September 1991

SERVICE INFORMATION

Inspection of steering locks returned under warranty has revealed that incorrect installation of the lock during repair jobs causes it to jam, rendering it unusable. Therefore, the following guidelines must be observed during removal/installation of the steering lock. In the future, warranty claims for jammed steering locks will be rejected.

1. The steering lock can only be installed with the lock cylinder in position "1". See Fig 2 . In position "1", the rectangular recess in the driver (48, Fig 1 ) is parallel with the steering lock axis, allowing the lock pin (39, arrow) to be pushed in. The electrical ignition/starter switch (S2/1, Fig 1 ) must be mounted on the steering lock for installation.
2. If the steering lock is in position "O" (lock pin 39 blocked, lock bolt 39a extended), then the driver (48, Fig 1 ) must be turned to installation position "1" using a small screwdriver until an audible click indicating engagement can be heard. See Fig 2 .
   NOTE: Do not turn the steering lock to position "3" without the ignition/starter switch (S2/1) attached. Doing so will cause the steering lock to irreversibly engage.
   NOTE: Regarding shift lock: As of model year 1990, all models with automatic transmission are equipped with an automatic transmission shift lock. As a result, the ignition key can only be removed from the lock with the selection lever in position "P". With the steering lock removed and the lock cylinder installed, the shift lock slide must be pushed back through the bore for the Bowden cable in order to remove the ignition key. To adjust the shift lock, see SMS Repair Instructions, Automatic Transmission 722.3, Job 27-740.
3. In replacement steering locks manufactured by "Huf", the mounting bores (45a) for the ignition/starter switch, as well as the vacuum switch (37c) in diesel models are not threaded. See Fig 3 . When installing the ignition/starter switch and the vacuum switch, threads must be cut in the steering column jacket tube using self-tapping screws. Do not cut threads with a screw tap.

PARTS INFORMATION

Part Name	Part Number
Self-tapping screws for ignition/starter switch	124 990 01 32
Self-tapping screw for vacuum switch (diesel)	124 990 00 32