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Inclination sensor, location/purpose/design/function - GF80.50-P-4105Q: Notes

MODEL 209.3 /4 up to 31.5.06 with CODE (551) Anti-theft alarm system (ATA [EDW]) 

MODEL 209.3 /4 as of 1.6.06 with CODE (551) Anti-theft alarm system (ATA [EDW]) except CODE (494) USA version except CODE (498) Japan version 

Shown on model 209.3 

Fig 1: Identifying Inclination Sensor Location
G04960181Courtesy of MERCEDES-BENZ USA
  ATA anti-towing sensor, location The ATA inclination sensor (B33) is located in the trunk on the left wheelhouse  
  Inclination sensor, task Monitors positional changes of the vehicle.  
  Inclination sensor, design The ATA inclination sensor (B33) contains electrodes in an electrolyte (electrically conductive fluid).  
  ATA anti-towing sensor, function   GF80.50-P-4105-01Q