Function Of Individual Components

Components 1 - 6:

Function Of Individual Components

1 - Parking aid
When reverse gear is engaged, the corresponding rearview mirror (right-hand drive or left-hand drive according to coding) is lowered by the angle stored. Manual adjustment of the seat motors is carried out parallel to the lowering of the rearview mirror. Automatic adjustment interrupts the lowering procedure. If reverse gear is still engaged after automatic adjustment is complete, the rearview mirror is lowered again.

2 - Rearview mirrors
Manual adjustment of both rearview mirrors is carried out with the switch for rearview mirrors or changeover switch for rearview mirrors. When the desired positions have been adjusted and stored by means of the switch for memory seat adjustment, automatic adjustment of the rearview mirrors is carried out by actuating the corresponding switch (1, 2 or 3)

3 - Support with transmission
The support with transmission consists of the following components:
- Two electric motors with a potentiometer
- Transmission

4 - Front seat
The following are the possibilities for adjusting the front seat:
- Backrest
- Front height
- Rear height
- Longitudinal direction
- Upper lumbar
- Lower lumbar
When the desired positions have been found and stored by means of the switch for memory seat adjustment, they can be called up at the push of a button when required.


5 - Control module
The control module is fastened under the front seat (driver's side) with two screws. There is a total of 10 connection points on the control module.


6 - Switch for memory seat adjustment
These switches [M, 1, 2, 3] can be used to store or call up the optimum positions once they have been found. The systems enables adjustment values for three persons to be stored.

Lumbar support

Fig. 1:

Fig. 2:

The lumbar support consists of two cushions which are inflated by means of a motor for lumbar support. The cushions are inflated or deflated to the required pressure one after the other beginning with the upper cushion. The pressure in the cushions is measured using a pressure sensor (regulating switch). The pressure sensor is located at the same height as the headrest and is integrated into the lumbar adjustment. Automatic adjustment of the lumbar support is carried out by actuating the switch for memory seat adjustment. The motor for lumbar adjustment is shown in the figure together with both lumbar cushions. Automatic adjustment of the lumbar support is divided into two phases.

1. If the seat motors have not yet reached their required position adjustment of the lumbar support is interrupted by releasing the switch for memory seat adjustment.
2. If the seat motors have reached their required position, adjustment of the lumbar support is completed after the switch for memory seat adjustment is released.


Electric motor for backrest adjustment

Fig. 3:

The backrest is adjusted by an electric motor with transmission. A Hall-effect sensor is integrated into the electric motor which measures the actual position.

Switch for seat adjustment
Manual adjustment of the seat positions is carried out by actuating the three switches located on the driver's seat (front seat).







[1,2,3]- Fore-and-aft adjustment and height adjustment are carried out by actuating the switch in the positions shown in Figure.
[4]- The seat backrest can be brought into desired position by actuating the switch.
[5]- The lumbar support is inflated or deflated by actuating the switch.

The figure shows how the following system components are arranged under the front seat.

Fig. 5:

[1]- Control module
[2]- Electric motor for front height adjustment
[3]- Electric motor for seat adjustment
[4]- Electric motor for rear height adjustment