Operating, display unit with control unit, location - GF82.85-P-3114-05TA

View of the back when removed 

Fig 1: Identifying COMAND Operating, Display And Control Unit

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Location 

The COMAND operating, display and control unit (A40/3) is installed in the 2-DIN opening in the center console between the operating module for the interior air conditioning and the upper control panel.