Radio control panel, component description - GF82.60-P-3116GQ

MODEL 164.1 with CODE (523) MB Audio 20 radio as of model year 09/YoM 08 model refinement package 

MODEL 164.8 with CODE (523) MB Audio 20 radio as of model year 09/YoM 08 

MODEL 251.0 with CODE (523) MB Audio 20 radio as of model year 09/YoM 08 

MODEL 251.1 with CODE (523) MB Audio 20 radio as of model year 09/YoM 08 

Shown on model 164.1 

Location 

The radio is located in the center of the instrument panel.

Task 

• Central operating and display unit for the entertainment and communication systems integrated into the vehicle 
• Reads in the controls and input signals 
• Evaluation of input factors 
• Actuates output media 

Central operating and display unit for the entertainment and communication systems integrated into the vehicle 

The radio provides the user with a structured and uniform interface.

Reads in the controls and input signals 

The input factors are read in via the following connections:

• Direct line 
• Controller Area Network (data bus/CAN bus) (CAN) 

Direct line 

The radio consists of the following direct connections:

• Circuit 30
• Circuit 31
• Telephone MUTE
• FM/AM/RRCL [FZV] antenna (A2/93a1), roof antenna module (A2/93) and FM rear window antenna amplifier (A2/19)
• Bluetooth antenna (A2/91)
• Hands-free system microphone group (A67b1)
• AUX input (access in glove compartment)

CAN 

The radio is an interior CAN subscriber. It communicates with the following components, for example:

• Instrument cluster (A1)
• EIS [EZS] control unit (N73)
• Central gateway control unit (N93)

Evaluation of input factors 

The input values are processed in the radio.

Actuates output media 

The following direct output signals are possible:

• Audio Out (speaker) to following speakers:
  • Left front door speaker (H4/5)
  • Right front door speaker (H4/6)
  • Left rear door speaker (H4/3)
  • Right rear door speaker (H4/4)
  • Left front door tweeter (H4/33)
  • Right front door tweeter (H4/34)
  • Left rear door tweeter (H4/35)
  • Right rear door tweeter (H4/36)
• Switch on and switch off signals for Bluetooth module (A34/7), with code (386) Mobile phone
• Provision of structured and uniform interface for the following system components:
  • Audio system (e.g. radio, CD (also MP3), AUX)
  • Communication system (e.g. telephone with telephone book function)
  • Tone settings (e.g. bass, treble, fader, balance)
  • System settings (e.g. brightness and contrast of display
  • Evaluation of signals from interior CAN
• Power supply for Bluetooth antenna, FM/AM/RRCL [FZV] antenna, roof antenna module and FM rear window antenna amplifier

Design 

Function 

The buttons on the radio are read in and the signals made available to the integrated central computer. Button actuation is processed further in the central computer. A radio can be switched On and Off with the On/Off button. The volume is regulated by turning the volume setting button for each set audio source. The user can switch to the required system component by pressing the menu buttons.

Single slot CD drive 

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

	Cockpit Management and Data System (COMAND) control unit wiring diagram	Model 164	PE82.85-P-2101-99MAE
		Model 251	PE82.85-P-2101-99RAE