Level Control System Sensor Overview

Level Control System Sensor Overview






1 Nut

• 9 Nm

• Replace

• Self-locking

2 Bolt

• 9 Nm

3 Rear Level Control System Sensors

• Left side left rear level control system sensor (G76).

• Right side right rear level control system sensor (G77).

• Removing and installing, refer to => [ Rear Vehicle Level Sensor ] Self-Leveling Suspension.

4 Bolt

• 5 Nm

5 Bracket

• For the rear vehicle level sensor.

6 Bolt

• 70 Nm + 180° turn

• Always replace if removed.

• Tighten either in the curb weight position, refer to => [ Wheel Bearing, with Coil Spring, Lifting into Curb Weight Position ] Description and Operation, or in the control position, refer to => [ Wheel Bearing, with Air Suspension, Lifting to Curb Weight Position ] Rear Suspension.

7 Nut

• Always replace if removed.

8 Bolt

• 9 Nm

9 Bracket

• For the front vehicle level sensor.

10 Front Vehicle Level Sensor

• Left side left front level control system sensor (G78).

• Right side right front level control sensor (G289).

• Removing and installing, refer to => [ Front Vehicle Level Sensor ] Front Vehicle Level Sensor.

11 Bolt

• 5 Nm

General Information

Vehicles with level control and/or gas discharge lamps have standard automatic headlamp range control.

To function properly, the level control and automatic headlamp range control system need information about compression travel or rebound travel at the front and rear axles.

For this, the position of the left/right lower transverse link in relation to the body is transferred via a coupling rod to left rear level control system sensor (G76) and right rear level control system sensor (G77). They transmit electrical signals to the level control system control module (J197).

The signals from the left front level control system sensor (G78) and the right front level control sensor (G289) are transmitted to the level control system control module at the rear axle.

These signals are required for determining vehicle level.

The headlamp range control responds automatically to changes in the vehicle level.

The vehicle level can change in the following situations:

• Trailer mode.

• Different load conditions; vehicle empty, vehicle partially or fully loaded.

• Adapting control position and checking headlamp basic setting is necessary if:

• The lower transverse link has been removed and reinstalled or replaced.

• The subframe was replaced.

• Installation work has been performed on the level control system sensor.

• The level control system sensor has been replaced.

• The level control system sensor coupling rod threaded connection was loosened at the lower transverse link.