What is the easiest way to verify which modules were installed when the car was built? I am interested in finding out if my car has a voice module, phone module, or bluetooth module fitted since there is the small microphone next to the rear view mirror already there. Any help would be appreciated. Thanks.

 

There might be easier ways but all of those modules will be stacked on top of each other in the boot behind the LH carpet beside the CD changer,Nav Unit if fitted