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 (such as Autel, Bosch, iCarsoft, etc.) to clear existing fault codes from the airbag control unit caused by a faulty seat mat. Once connected, the emulator allows your diagnostic tool to erase stored errors and turn off the SRS/airbag warning light. Please note that safety system error codes do not clear automatically. Before purchasing, scan your vehicle with a compatible diagnostic tool to confirm the SRS/airbag warning is due to a defective seat occupancy sensor. Name: Car Seat Occupancy Mat Sensor SRS Bypass Emulator Fitment Type: Direct Replacement Installation: Direct Replacement Condition: Compatible Models: - For Mercedes-Benz A-Class W176 (2012–2018) - For Mercedes-Benz B-Class W246 (2011–2018) Color: As Shown Material: Plastic Package Contents: 1 x Car Seat Occupancy Bypass MAT SRS Emulator Sensor Note: The package includes only the items listed above. Other accessories are not included. Due to lighting effects and monitor settings, the color of the item may vary slightly from the images shown. Measurement variations may occur within ±1–3 cm.