Microphone Unit in Front Roof Module -R164-, REMOVING AND INSTALLING: Notes
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The Microphone Unit In Front Roof Module -R164- located in the Front Interior Lamp -W1- can only be replaced as a complete unit.
-- Turn off the ignition and all electrical consumers and remove the ignition key.
WARNING:
Danger of unintended engine ignition
Turn off the ignition and remove the ignition key from the vehicle interior for all work performed on the high voltage vehicle.