The seat occupancy mat is a sensor mounted in the front passenger seat. The emulator simulates a person sitting in the passenger seat with a seat belt fastened. To make the emulator work, you need a diagnostic tool to clear existing fault codes related to a faulty seat mat stored in the control unit. Once connected, the emulator allows the diagnostic tool to clear fault codes and deactivate the SRS/airbag warning light. Fault codes related to safety systems must be cleared manually using the diagnostic tool. Before purchase, scan your vehicle with a diagnostic tool to confirm that the SRS/airbag warning light is caused by a defective seat occupancy mat. Compatible with: - C-Class W203 Saloon/Sedan (2000–2004), pre-facelift - C-Class S203 Estate (2000–2003), pre-facelift - C-Class CL203 Sport Coupe (2000–2008) - CL203 (2008–2011) - CLK W209/C209 Coupe (2002–2004), pre-facelift - CLK W209/A209 Cabriolet (2002–2004), pre-facelift Material: Plastic + Metal Color: As shown Package Contents: 1 × Bypass emulator Note: Screen settings and lighting conditions may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.