Component description for the radio - GF82.60-P-3122CE

MODEL 204.0 with CODE (523) MB Audio 20 radio except CODE (494) USA version up to model year 2009 /YoM 08 

MODEL 204.2 with CODE (523) MB Audio 20 radio as of model year 2009 /YoM 08 

MODEL 204.3 /9 with CODE (523) MB Audio 20 radio except CODE (494) USA version 

Shown on model 204.0 up to 28.2.2011 

The design versions of the radio on model 204.0/2 as of 1.3.2011 are described in the chapter "Body".

Location 

The radio is located in the center console.

Shown on model 204.3 except code (508) Navigation box preinstallation, except code (509) Navigation box 

The design versions of the radio on model 204.3. as of are described in the chapter "Body".

Task 

• Central operating unit for the entertainment and communication systems integrated into the vehicle 
• Reading 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.

• RADIO (FM, MW, SW, LW)
• DISK (CD/MP3/AUX)
• TEL (telephone with telephone book function, SMS (with code (386) Mobile phone), call lists)

With navigation activated with the "NAVI" button (with code (509) Navigation box), the user surface is generated in the navigation module (A2/30) not in the radio. The function and menu guidance are provided by the manufacturer and are not specific for Mercedes-Benz.

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) 
• 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).

Direct line 

The radio is equipped with the following direct connections:

• Circuit 30g
• Circuit 31
• FM, AM and CL antenna amplifier (A2/18), on model 204.0/3
• Rear window antenna amplifier 1 (A2/71), for model 204.2/9
• Rear window FM antenna amplifier (A2/19), on model 204.0/2/3 and on model 204.9
• Bluetooth antenna (A2/91)
• Handsfree system microphone (A67b1)
• Electrical AUX connector (X39/45) (up to 28.2.2011 in glove compartment, as of 1.3.2011 in stowage compartment (telephone compartment) below center console)
• Electrical USB connector (X115), model 204.0/2 as of 1.3.2011, model 204.3
• Cradle for navigation module (A2/30-1) (with code (508) Navigation box preinstallation or code (509) Navigation box) (in glove compartment)
• External fan (diagnosis)

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)
• Video OUT: low voltage differential signaling (LVDS) line, transmits picture signals from the COMAND controller unit to the Audio/COMAND display via a copper line
• Switch voltage for the mobile phone cradle (A34/15) via the contact plate and the Bluetooth module (A34/7), with code (386) Comfort telephony
• External fan (power supply, speed control and diagnosis)

The radio generates a structured and standard interface, which is then shown on the Audio/COMAND display.

Body 

Shown on radio up to 28.2.11 (except code (508) Navigation box preinstallation, except code (509) Navigation box) 

On vehicles with code (508) Navigation box preinstallation or code (509) Navigation box, the "NAVI" button on the left keypad has been replaced by the "Tone" button (music symbols).

Design deviations: on model 204.0/2 as of 1.3.2011 and model 204.3 the "SYS" button on left keypad also has a clock symbol and the "C" button the left edge of the right keypad is a "CLEAR" key.

Function 

The buttons for the operating panels on the radio are read in and made available to the integrated central computer. Button actuation is processed further in the central computer. If the "ON" button on the radio is pressed, the radio switches on. The volume is regulated for each audio source set by turning the ON button. Pressing the function keys in the left button panel enables the user to switch to the desired system components.

CD drive 

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

Technical data  Designation	Unit	Values	Tolerance range	Remarks
Radio
Power supply	VV	12		Battery voltage UB
Voltage limits	VV	9		Minimum UBmin
	VV	16		Maximum UBmax
Power consumption	A	15		Rated power consumption IBmax
	A	5		Rated power consumption IModel
	A	approx. 4.5		Action, speaker IAction
	A	approx. 0.1		Action Cradle ON/OFF IAction
	μA	180		Quiescent current I0
Reverse polarity protection				Yes
Additional specific parameters				None
Special features				The radio is protected with a 10A fuse in the MQS-40 connector at the rear panel.
Flash capability/coding capability				Yes/yes

	Wiring diagram for radio (RD) control unit	Model 204.0/2 as of model year 2012/model refinement package 11 Type 204.3	PE82.60-P-2101-97FAB
		Model 204.0/2 up to model year 2012/model refinement package 11 Model 204.9	PE82.60-P-2101-97FAA