Modified Steering Lock With Lock Cylinder (46/76)

MODIFIED STEERING LOCK WITH LOCK CYLINDER

TECHNICAL SERVICE BULLETIN

MODEL 129 AND 140 - MODIFIED STEERING LOCK WITH LOCK CYLINDER

Model(s): 1992 Mercedes-Benz 400 SE; 1992-1993 Mercedes-Benz 300 SD, 300 SE, 500 SEL, 600 SEL, 300 SL, 500 SL; 1993 Mercedes-Benz 400 SEL, 500 SEC, 600 SEC, 600 SL

Group: 46 - Steering System

Bulletin No.: 46/76

Date: July 1992

SERVICE INFORMATION

Since November 1991, a modified steering column lock is used on models 129 and 140.

• The lock cylinder is installed while in position instead of position 0. This results in improved theft resistance.
• The joint (arrow) was altered and the spacer tube (35) and cap (31) are now made of plastic instead of aluminum. See Fig 1 .

Model	As Of Chassis End Number
129 140	F 048351 A 036951

Model	As Of
129, 140	8/91

REPAIR PROCEDURE

1. Remove lock cylinder with spacer tube (SMS, job 46-0645).
   NOTE: The lock cylinder can not be removed from the spacer tube. As a result, the spacer tube and the cap must be replaced at the same time.
2. Turn the new lock cylinder (32) to position using key (33). See Fig 2 .
3. Push lock cylinder (32) into spacer tube (35) until it snaps into place audibly. See Fig 3 . Turn key (33) back to position 0 and pull out.
4. Push cap (31) on. See Fig 4 . As soon as the locking ring (35a) snaps into place, the cap is permanently attached to the spacer tube. As a result, the lock cylinder can no longer be removed. This feature is retroactive for all vehicles. The available replacement lock cylinders can only be installed when set to position 1.

PARTS INFORMATION

Part Name	Part Number
Aluminum spacer tube and cap	129 462 05 53 129 462 20 23
Plastic spacer tube and cap	140 462 02 53 140 462 10 23
Lock cylinder with installation 1 position	129 462 01 79