ABC comfort and sport switch, component description - GF32.50-P-4231R

MODEL 230 as of 1.3.06 with CODE (487) Active Body Control (ABC)

Location

The ABC Sport switch is a component of the lower control panel control unit (N72)

Task

The driver can choose between two transmission modes, Sport and Comfort.

Fig 1: Identifying ABC Comfort And Sport Switch

Courtesy of MERCEDES-BENZ USA

Function

The modes have different suspension characteristics. Comfort mode is set softer than Sport mode.

The suspension characteristics are selected using the ABC Sport switch, read by the lower control panel control unit and placed on Controller Area Network bus class B (interior) (CAN-B).

The EIS [EZS] control unit (N73), with gateway function, transmits this information to Controller Area Network bus class C (engine compartment) (CAN-C) and thus to the ABC control unit (N51/2).

The ABC control unit has to set the relevant bits in the communication matrix to actuate the LED.

The Comfort or Sport performance map selection is stored in the EEPROM of the ABC control unit. After engine start, the same performance map applies as before ignition "OFF".

When the ignition is switched on, an LED test is performed as long as the engine is not yet running. Button actuations in function mode are not evaluated as driver requests until the engine is running and are then stored in EEPROM.

The actual evaluation of the button position is performed by the lower control panel control unit.