Component Description For The Radio - GF82.60-P-3122GRA

MODEL 166 

up to model year 2016 

with CODE 510 (Audio 20 with CD changer) 

MODEL 166 

up to model year 2016 

with CODE 523 (MB Audio 20 radio) 

Illustrated on model 166.0 

Location 

The radio is located in the center console.

Tasks 

• Central operating and display unit for the entertainment and communications systems integrated in the vehicle 
• Reading in the controls and input signals 
• Evaluation of input factors 
• Activation of output media and system components Central operating and display unit for the entertainment and communications systems integrated in the vehicle 

The radio provides the user with a structured and standard user interface for the following system components:

• Audio system (e.g. "Radio", "CD" (also MP3), AUX)
• - Communication system (e.g. telephone with telephone book function)
• - sound settings (e.g. "bass", "treble", "fader", "balance")
• System settings (e.g. "Brightness" and "Contrast" of the Audio/COMAND display (A40/8))

The user interface is shown on the Audio/COMAND display.

Reading in the controls and input signals 

The input factors are read in via the following connections:

• Controller Area Network (data bus/CAN bus) (CAN) 
• Media Oriented System Transport (MOST) (except CODE 523 (MB Audio 20 radio)) 
• Direct line 

Controller Area Network (data bus/CAN bus) (CAN) 

The radio is a subscriber of the interior CAN (CAN B) and the telematics CAN (CAN A).

Media Oriented System Transport (MOST) (except CODE 523 (MB Audio 20 radio)) 

Control and audio signals from the following control units:

• Sound system amplifier control unit (N40/3) (with CODE 810 (Sound system) or CODE 811 (Advanced sound system))
• Digital Audio Broadcasting control unit (N87/3) (with CODE 537 (Digital radio))
• Media interface control unit (N125/1) (with CODE 518 (Media interface))

Direct line 

The radio is equipped with the following direct connections:

• Terminal 30
• Circuit 30g
• Circuit 31
• Wake-up for MOST (except CODE 523 (MB Audio 20 radio))
• USB electrical connector (X115) in stowage compartment between front seats
• AUX connection electrical connector (X39/45) (up to 13.12.2013) in stowage compartment between the front seats, for external audio equipment (except CODE 518 (Media Interface))
• Bluetooth® antenna (A2/91)
• FM 1, AM, CL [ZV] and KEYLESS-GO antenna amplifier (A2/18)
• FM 2, DAB and TV 1 antenna amplifier (A2/19), on vehicles with CODE 508 (Navigation box preinstallation) or with CODE 509 (Navigation box) over the FM/TMC antenna splitter (A2/98)
• Bracket for navigation module (A2/30-1) (with CODE 508 (Navigation box preinstallation) or CODE 509 (Navigation box))

Evaluation of input factors 

The input values are processed in the radio.

Activation of output media and system components 

The following direct output signals are possible:

• Audio output (speakers) (except CODE 810 (Sound system) or CODE 811 (Advanced Sound System))
• Switching voltage for the mobile phone cradle (A34/15) over the contact plate (X237/1) (as from 15.07.2013) (with CODE 386 (Comfort telephony) or the Bluetooth® module (A34/7) (up to 12.07.2013) with CODE 386 (Comfort telephony))
• Power supply for connected Universal Serial Bus (USB) mass storage device to USB electrical connector
• Microphone output to cradle for navigation module (with CODE 508 (Navigation box preinstallation) or CODE 509 (Navigation box))
• Bluetooth® antenna

Body 

CD drive 

The integrated CD drive can be used to play audio CDs (including in MP3 format).

Function 

The status of the buttons on the radio operating panel is read in and made available to the central computer. Button presses undergo further processing in the central computer and are forwarded to the other system components in the form of messages over MOST (except CODE 523 (MB Audio 20 radio)), telematics CAN or the interior CAN. If the "ON" button on the radio is pressed, the radio switches on. The volume is regulated by turning the "ON" button. The buttons switch over to the audio source desired by the user.

	Cockpit Management and Data System (COMAND) control unit wiring diagram	A2 Sheet 1	PE82.85-P-2101-97NAA
		A2 Sheet 2	PE82.85-P-2101-97NAD