Contents: Removal ↡ Installation and adjustment ↡
Removal
1. Raise the hood and position a thin sheet of metal (approximately 300 mm in area) at the rear of the engine compartment bulkhead to protect the bulkhead insulation during subsequent work.
2. Apply the parking brake and raise the front of the vehicle and support it on stands (see "Lifting the car and placing it on supports").
3. Release the exhaust system components from the rear supports (refer to Chapter 4), then support the system parts with wire or rope approximately 500 mm lower than the normal position.
4. On models equipped with an auxiliary heater, be careful not to damage the cooling hose at the rear of the engine compartment when performing the following steps.
5. Move the gear shift lever to the "N" position.
6. Working from underneath the vehicle, remove the metal retainer and disconnect the shift lever from the rod.
7. Remove the exhaust system support bracket bolt from the transmission and system. Remove the bracket.
8. Position a jack on wheels with a block of wood in between under the rear powertrain mount bracket and raise the jack to support the transmission.
9. Unscrew the power unit mounting bracket from the bottom of the vehicle.
10. Carefully lower the jack, lowering the rear of the transmission so that you can access the starter interlock switch/reverse light switch. Be careful not to damage components at the rear of the engine bay.
11. Loosen the clamp securing the speedometer cable to the gearbox.
12. Turn the lock upward, then disconnect the connector from the switch.
13. Loosen the two mounting screws and remove the switch from the gearbox.
Installation and adjustment
14. Install the switch onto the transmission, making sure the pin on the switch is aligned with the hole in the shift lever (see fig. 5.14). Check that the shift lever is in the "N" position (the position is indicated on the gearbox housing).
Fig. 5.14. Adjusting the starter interlock switch/reversing light switch
15. Insert a 4.0mm drill bit or rod through the switch lever and guide the pin to align with the mounting hole in the switch body.
16. Tighten the switch mounting screws, then remove the drill or rod.
17. Connect the switch connector and secure it with the clamp.
18. Raise the jack and tighten the bolts securing the rear powertrain support bracket to the bottom of the vehicle.
19. Install the exhaust system mounting bracket.
20. Connect the speedometer cable.
21. Connect the shift lever rod to the lever and secure it with the retainer.
22. Connect the exhaust system to the rear bracket.
(Material taken from a web resource: mercedesman)
23. Lower the vehicle to the ground and remove the metal shield from the engine compartment.