If you done on-board computer scan after that seeing check engine light and any of these error codes U029E00, U029E, U029D00, U029D, P229F62, P229F, P2202, you need to replace faulty sensor as soon as possible to avoid any damages to the catalytic converter. Xenon Planet is one of the leading suppliers of Mercedes Benz A0009053603 Continental 5WK96683D NOX Sensor » . It comes with integrated probe which can't be unplugged and it is direct replacement for continental brand part. It is factory fitted to different MB brand car models such as: C class W205 S205 A205 E Class W212 S212 ML and many others. For more details, explore our website now!