Removing and installing turn signal repeater bulb -L131-/-L132-, entry light in exterior mirror -W52-/-W53-
Additional information: → Current flow diagrams, Electrical fault finding and Fitting locations
Fault detection and fault display:
The driver door control unit -J386- or the front passenger door control unit -J387- features self-diagnosis to facilitate fault finding.
For fault finding, use the systems described in chapter “Vehicle diagnosis, testing and information system” in “Guided Fault Finding” mode → Chapter.
The operation of the turn signal repeater bulb and the entry light in exterior mirror can be checked by means of the final control diagnostic function of the respective door control unit.
The driver side entry light in exterior mirror -W52- and the front passenger side entry light in exterior mirror -W53- are installed in the left/right exterior mirror housing respectively.
The driver side turn signal repeater bulb -L131- and the front passenger side turn signal repeater bulb -L132- are installed in the left/right exterior mirror housing respectively.
The entry lights illuminate the entrance area around the opened driver door or front passenger door when it is dark.
t The turn signal light in the exterior mirror uses LEDs, which cannot be replaced separately.
t In the event of damage, the complete turn signal light unit in the exterior mirror must be renewed.
– Switch off ignition and all electrical consumers.
– Disengage ignition key out in position 0 (forward notch).
During removal and installation, place the radio remote control ignition key in the vehicle’s interior to prevent the doors from locking and possible independent activation of the “Coming Home / Leaving Home” functions.
t The removal and installation are only described for the left turn signal repeater. Removal and installation of right turn signal repeater are carried out in the same way.
t The lower part of the housing and the turn signal repeater form one part.
Removing trim with turn signal
– Remove mirror glass →General body repairs, exterior; Rep. gr.66.
– Remove mirror housing →General body repairs, exterior; Rep. gr.66.
– Remove trim →General body repairs, exterior; Rep. gr.66.
– Release locking hooks -4-.
– Pull trim with turn signal repeater -1- off mirror mounting.
Removing entry light
The entry light can only be removed if the lower part of the housing has already been removed.
– Slightly lift up entry light -2—arrow a- and pull it off the lower part of the housing -1—arrow b-.