Tail Lamp: Description and Operation

General Information

The tail lamp assemblies cannot be disassembled up to the left and right turn signals and the right back-up lamp. The right turn signal and right back-up lamp are generated by one light bulb, which cannot be replaced individually. The remaining lighting is provided by LEDs. Malfunctioning LEDs cannot be replaced.

• LED failure in auxiliary brake lights (not USA and Canada):

• Individual LEDs (Light Emitting Diodes) in LED Tail lamp assemblies (tail, turn signal, brake and backup lamp) combined into groups of up to four LEDs each and are supplied with power as a group.

• LED tail lamp assemblies are constructed in such a way that when one LED group fails as a function (e.g. brake lamp), the requirements of ECE regulations (Economic Commission for Europe) are still met.

• If another LED group fails functionally, these legal requirements are no longer met.

• When one LED group fails, the function of the intact LEDs are given a higher load, by which failure of other LED groups can be assumed in the near future.

• Replace the entire tail lamp assembly if more than 4 LEDs in one function are faulty.

DTC recognition and display:

Vehicle electrical system is equipped with OBD which assists Fault Finding the tail lamps.

For troubleshooting, use Vehicle Diagnostic, Testing and Information System (VAS 5051A) in operating mode "Guided Fault Finding".