Removal and installation of seat belt and tensioner - ra91001400502x(0502)
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
Model 140
REMOVAL
| Seat | move forward. |
| Foot mat in passenger footwell | fold toward rear. |
| Passenger foot support | screw off and remove upward. |
| Ignition key | turn to position "0". |
| Battery | disconnect negative pole. |
| Test coupling for seat belt tensioner (X11/7) | disconnect. |
| On vehicles with airbag | disconnect test coupling/plug connection, for airbag (X11/13). |
| Cover bar on entry strip, front and rear | remove. |
| Edge protector on B-pillar | remove. |
| 2 screws (1) at bottom of B-pillar covering (2) | screw out and remove covering upward. |
| Clips on B-pillar covering (3) | press in with screwdriver (arrows) and pull off covering. |
| Screw (4) on belt end fitting | screw out. |
| Nut (5) on upper belt guide fitting | screw out. |
| Screw (6) on automatic belt roller | screw out. |
| Plug connector on belt tensioner squib (R12/1, R12/2) | disconnect together with belt convenience feature. |
| Automatic belt retractor | press down and remove from B-pillar. |
Installation note
When installing the belt tensioner pay attention to the different versions (left and right) and ensure that it is properly seated in the catch.
NOTE:
Noises in the automatic belt retractor when the belt is are normal. If complaints are received excessive noise can only be eliminated by replacing the seat belt. Do not oil or grease to eliminate noises under any circumstances.
Do not disassemble automatic belt retractor , because the pretensioned spring can cause accidents. Automatic belt retractor, which have been opened, are no longer covered by the warranty.
Special tools
COMMERCIALLY AVAILABLE TESTER
| Multimeter | e.g. Firma Sun, DMM-5 or Avometer 2003 Fluke 23 |
After installation of the belt tensioner check the system (belt tensioner or airbag with belt tensioner); for this purpose connect test cable and contact box according to connection schematic.
Connection schematic for contact box
Test resistances according to table with multimeter.
TABLE
| Scope of test | Socket | Resistance value |
| Left front seat belt tensioner squib (R12/1) | 9-10 | 2-5 Ω |
| Right front seat belt tensioner squib (R12/2) | 11-12 | 2-5 Ω |