System activation button, component description - GF40.15-P-5127SX

MODEL 216.3, 221.0 /1

with CODE (475) Tire pressure monitor (Siemens)

up to Model Year 8

MODEL 216.3, 221.0 /1

with CODE (470) Tire pressure monitor (base)

up to Model Year 8

MODEL 216.3

with CODE (494) USA version

up to Model Year 8

Location shown on model 221 up to 31.8.06

Fig 1: Identifying Tire Pressure Monitor Warning Lamp, Display And Buttons

Courtesy of MERCEDES-BENZ USA

Task

The tire pressure monitor (RDK) system is permanently operational and is not operated actively by the driver.

As of "terminal 15 ON" the TPM [RDK] control unit (N88) carries out a reinitialization and starts to transmit signals to the multifunction display. A reactivation of the TPM system can be triggered by the system selection button and the scroll forward/back button.

The TPM system can be reactivated in the following cases:

Tire pressure changed (e.g. by refilling)
After each wheel or tire change

With the activation of the TPM system the air pressure values of the wheels set by the driver are stored in the TPM [RDK] control unit as specified monitoring data.