AIRmatic with ADS control unit, component description - GF32.22-P-5108SX

MODEL 221 with CODE (489) AIRmatic (semi-active air suspension) up to Model Year 8 

The AIRmatic with ADS control unit (adaptive damping system) is mounted under the front passenger foot plate.

Function 

The air suspension with adaptive damping system, is a combination of air suspension (pure level control) with an automatic damper adjustment (two solenoid valves on the damping valve unit). The system operates in accordance with a control algorithm which establishes the suitable damping stage depending on the driving situation.

Activation of the AIRmatic with ADS control unit 

The AIRmatic with ADS control unit is activated when the chassis CAN is activated, via which the control unit receives the wake-up pulse. The control unit checks the current vehicle level. The vehicle level is corrected if necessary.

Diagnosis 

If the AIRmatic with ADS control unit detects a fault, the corresponding fault message is transmitted to the central gateway control unit (N93) via the chassis CAN and on to the instrument cluster (A1) via the central CAN. Thereupon the instrument cluster displays a message in the multifunction display (A1p13).

The AIRmatic with ADS control unit is connected to the data link connector via the diagnostic CAN, the central gateway control unit and via the chassis CAN (X11/4).

Block diagram of AIRmatic with ADS control unit