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Cruise control pushbutton switch, location/task/design/function - GF30.30-P-3100M

ENGINE 275.950 in MODEL 215, 220 with CODE (494) USA version with CODE (498) Japan version 

ENGINE 275.951 in MODEL 230 with CODE (494) USA version with CODE (498) Japan version up to Model Year 8 

ENGINE 275.953 in MODEL 216, 221 with CODE (494) USA version with CODE (498) Japan version up to Model Year 8 

ENGINE 275.954 in MODEL 230 with CODE (494) USA version with CODE (498) Japan version up to Model Year 8 

ENGINE 275.980 in MODEL 215, 220 with CODE (494) USA version with CODE (498) Japan version 

ENGINE 275.981 in MODEL 230 with CODE (494) USA version with CODE (498) Japan version up to Model Year 8 

ENGINE 275.982 in MODEL 216, 221 with CODE (494) USA version with CODE (498) Japan version up to Model Year 8 

ENGINE 285.950 in MODEL 240 with CODE (494) USA version with CODE (498) Japan version 

ENGINE 285.980 in MODEL 240 with CODE (494) USA version with CODE (498) Japan version 

Fig 1: Locating CC [TPM] Switch
G07622957IMPORTANTCourtesy of MERCEDES-BENZ USA
  Cruise control switch location Left top behind the steering wheel.  
  Cruise control switch task Setting of cruise control and Distronic.  
  Cruise control switch design Pushbutton switch with several switching contacts.  
  Cruise control switch function When the cruise control pushbutton switch is operated, two switching contacts are always activated simultaneously. The actual input takes place by closing one of the switch contacts (storing the speed). The safety contact must close simultaneously so that the input is accepted.  
IMPORTANT   The switching signals are detected by the steering column module and transmitted to the CAN data bus.