Component description for the CC [TPM] switch - GF30.20-P-2100SX

ENGINE 156, 273, 275 in MODEL 216 with CODE (233) Distronic Plus except CODE (494) USA version up to Model Year 8

ENGINE 156, 272, 273, 275, 642, 629 in MODEL 221 with CODE (233) Distronic Plus except CODE (494) USA version up to Model Year 8

Location

Fig 1: Locating CC (TPM) Switch

Courtesy of MERCEDES-BENZ USA

The CC [TPM] switch is located at the top left of the steering column module (N80).

Task

The CC [TPM] switch has the following tasks:

Activating/deactivating functions of DISTRONIC PLUS or the Variable Speed Limiter
Increasing/reducing the set speed/target speed in 1 km/h or 10 km/h increments (two settings)
Setting the target distance for DISTRONIC PLUS

Design

Fig 2: Design Of CC (TPM) Switch

Courtesy of MERCEDES-BENZ USA

Function

Fig 3: CC (TPM) Switch Function Diagram

Courtesy of MERCEDES-BENZ USA

When the Cruise control pushbutton switch is operated, two switching contacts are always activated simultaneously. The actual input takes place by closing the switching contacts (storing the target speed). The safety contact must close simultaneously so that the input is accepted.

The distance potentiometer allows the driver to adjust the target distance to the preceding vehicle to suit his/her own personal taste.

The setting range of the target distance is divided into six increments and is approx. 1.0 s to 2.0 s depending on vehicle speed.

Within this setting range the legally prescribed minimum distance is always guaranteed.

The CC [TPM] signals are read in by the steering column module and transmitted via the chassis CAN to the radar sensor control unit (SGR) (N62/1) for evaluation.