The seat occupancy mat is a sensor mounted in the front passenger seat. The emulator simulates a situation of a person sitting in the passenger seat with a seat belt fastened. To make the emulator work you need a diagnostic tool (like for , , etc.) to remove old errors of a broken seat mat that are stored in the control unit. Once you connect the emulator your diagnostic tool will be to remove old errors and turn off the SRS or warning. Unfortunately, the errors related to the safety systems are not removing automatically. Before purchase, please scan your car with a diagnostic tool to make sure your SRS or warning is caused by a defective seat mat. These warnings can be turned on by at least 6 sensors mounted in the seat. The emulator solves the problem caused by a faulty seat mat only. The emulator will not solve your problem if a different sensor is faulty - the SRS or warning light will still be present after connecting the emulator and removing the error present in the diagnostic tool. Name: Car Seat Occupancy Mat Sensor SRS Bypass Emulator Fitment Type: Direct Replacement Install Fitment: for E-Class W211 Saloon or Sedan (production years: 2004-2009) for E-Class S211 Estate (production years: 2004-2010) for C219 (production years: 2004-2010) for S-Class W221 (production years: 2005-2013) for or S-Class Coupe C216 (production years: 2006-2014) Material: plastic colour: As shown Package Contents: 1 x Car Seat Bypass Emulator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store