Adaptive damping system (ADS II), function - GF32.32-P-0001B

MODEL 211 with CODE (489a) Airmatic (semi-active air suspension) 

MODEL 220 except CODE (487a) Active body control (ABC) 

MODEL 240 

Fig 1: Identifying Adaptive Damping System (ADS II) Function

The damping force is regulated in damping valves (Y51, Y52, Y53, Y54). Each wheel has one damping valve installed between the upper and lower chambers of the single-pipe gas-filled shock absorber. Each damping valve contains two electromagnetic valves (y1, y2), allowing four different damping force settings according to how they are actuated via the AIRmatic with ADS control module.

The extremely short adjusting time (milliseconds) means that the optimum damping force setting is available almost immediately if sudden changes in the vehicle level are required, such as during an obstacle-avoidance maneuver.