General Information - Telephone, Bluetooth
Hands-Free Calling, 9ZX
The Information Electronics Control Module 1 -J794- is
installed with the Microphone Unit In Front Roof Module -R164-
and is exclu
The Microphone Unit in Front Roof Module -R164- located in
the Front Interior Lamp -W1- can be replaced only as a complete
unit.
Removing
- Turn off the ignition and all electrical equipment an
Special tools and workshop equipment
required
Vehicle Diagnostic Tester with the "Guided Fault Finding"
function and the corresponding connection lines. Refer to
Workshop Equipment.
A standard thermometer (for temperature measurement; if
necessary, a thermometer with two measuring probes for
Operating the panoramic glass roof and
roof sunshade
Applies to: vehicles with panoramic glass roof and roof sunshade
Fig. 33 Headliner: panoramic glass roof and sunshade buttons
The control buttons are equipped with a twostage
function.
Operating the roof sunshade
The roof sunshade cannot be clos