CC [TPM] switch, component description - GF30.20-P-2100UX

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ENGINE 272 in MODEL 221 with CODE (219) Distronic (DTR) up to Model Year 8

ENGINE 273 in MODEL 221 with CODE (219) Distronic (DTR) 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.

Task

The CC [TPM] switch has the following tasks:

Activation/deactivation of the DISTRONIC functions and the Variable Speed Limiter
Increasing/reducing the set speed/target speed in 1 km/h or 10 km/h increments (two settings)
Set target proximity for DISTRONIC

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 CC [TPM] 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 DISTRONIC distance potentiometer allows the driver to adjust the target distance to the vehicle ahead 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] switch signals are read in by the steering column module (N80) and transmitted via the chassis CAN to the ESP control unit (N47-5) for evaluation.