ASR Switch for Traction Control- Genuine Mercedes

The Mercedes-Benz ASR Switch 140-821-46-51 is a Genuine Mercedes center console rocker switch designed for the Acceleration Slip Regulation (ASR) traction control system. Located on the dashboard trim panel alongside other auxiliary controls, it allows the driver to manually toggle or temporarily disable the vehicle's traction control for enhanced wheel traction in conditions such as deep snow or when utilizing tire chains. This specific component was primarily fitted to flagship mid-to-late 1990s Mercedes-Benz models equipped with the factory ASR option. It is most commonly found on the W140/C140 S-Class sedans and coupes (such as the S500 and S600) as well as the R129 SL-Class roadsters (including the SL500 and SL600). Over time, these switches can fail internally or lose their backlighting, requiring direct replacement to maintain full driver control over the traction control system.