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Home >> Mercedes Benz >> 2009 >> E350 Base >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes -- Functions & Locations -- E350 (211.256) >> Basic Knowledge >> Stop lamp switch. location/task/function - GF42.10-P-4000A

Stop lamp switch. location/task/function - GF42.10-P-4000A

MODEL 129, 140, 163, 168, 170, 202, 208, 209, 210, 211, 215, 220, 240 

MODEL 203, 230 up to Model Year 08/modification year 

MODEL 460, 463 

MODEL 461.217/219/223/227/229/238/239/249/266/267/302/321/322/323/326/327/328/329/331/332/335/336/337/338/341/342/345/365/366/367/368/401/402/403/404/405/450/451/452/454/455/456/458/459 

Fig 1: Stop Lamp Switch Circuit
G07284032Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Stop lamp switch, location   GF42.10-P-4000-01A 
Stop lamp switch, task The brake light switch (S9/1) transmits the signal about the actuation of the brake pedal to the brake lights and in addition sends a signal for brake actuation to different electronic systems (e.g. BAS, ETS, ASR, ESP, TPM, ERE, EVE, CDI, ME).  
Stop lamp switch, function The method of operation of the brake light switch (S9/1) manifests itself in two ways: Function as normally open contact (2) for the brake lights and function as opener (1) for control units.