A0009053603 5WK96683D NOX Sensor fits Mercedes-Benz’s different models. After conducting your car diagnostics, if your Mercedes-Benz car shows any of these error codes P229F62 P229FE1 P2202 U029E00 U029E U029D00 U029D, it means that the NOX sensor has failed and requires replacement. It is necessary to replace the new unit immediately to avoid any damage to DPF filter. Remember, error cleaning may be required after replacement.