AIRmatic Control Unit, Component Description - GF32.22-P-5110LF
Model 217, 222
Shown on model 222 up to model year 2018
Location
The AIRmatic control unit is located under the front passenger footwell plate.
Tasks
The AIRmatic control unit has the following tasks:
- Reading in of signals
- Evaluation of input factors
- Actuation of components
Reading in of signals
The input factors are read in over the following connections:
- Direct lines
- Suspension FlexRay (Flex E)
Direct lines
The signals from the following components are read in over direct lines:
- Circuit 30g (switched battery positive)
- Circuit 31
- Left rear level sensor (B22/7)
- Left front level sensor (B22/8)
- Right front level sensor (B22/9)
- Right rear level sensor (B22/10)
- AIRmatic pressure sensor (Y36/6b1) (with 4MATIC, except CODE 494 (USA version))
Suspension FlexRay
The AIRmatic control unit uses the suspension FlexRay and receives signals from the following control units:
- Audio/COMAND control panel (A40/9) (except code 446 (Touchpad only))
- CDI control unit (N3/9) (with diesel engine)
- ME-SFI control unit (N3/10) (with gasoline engine)
- Electronic Stability Program control unit (N30/4)
- Electronic ignition lock control unit (N73)
- Lower control panel (N72) (with code 446 (Touchpad only))
- Powertrain control unit (N127)
- Fully integrated transmission control unit (Y3/8n4)
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the affected components are then actuated.
Actuation of components
Components are actuated with the following lines:
- Direct lines
- Suspension FlexRay
Direct lines
The following components are actuated via direct lines:
- AIRmatic pressure reduction valve (A9/1y1)
- AIRmatic relay (K40/8kR)
- Left front level control valve (Y36/6y1)
- Right front level control valve (Y36/6y2)
- Left rear level control valve (Y36/6y3)
- Right rear level control valve (Y36/6y4)
- AIRmatic central reservoir filling valve (Y36/6y5) (with 4MATIC, except CODE 494 (USA version))
- Left front axle damping valve unit (Y51)
- Right front axle damping valve unit (Y52)
- Left rear axle damping valve unit (Y53)
- Right rear axle damping valve unit (Y54)
Suspension FlexRay
The AIRmatic control unit uses the suspension FlexRay and sends signals to the following control units:
- Instrument cluster (A1), over the electronic ignition lock control unit and the user interface CAN
- Audio/COMAND control panel
- CDI control unit (with diesel engine)
- ME-SFI [ME] control unit (with gasoline engine)
- Electronic Stability Program control unit
- Drivetrain control unit
| Wiring diagram of AIRmatic control unit | PE32.22-P-2101-97SEB | ||
| PE32.22-P-2101-97SEA |