Audio 20 function - GF82.60-P-0005GZ

MODEL 164.1/8 except CODE (494) USA version except CODE (498) Japan version with CODE (523) MB Audio 20 radio up to Model Year 2008

Fig 1: Identifying Radio

Courtesy of MERCEDES-BENZ USA

The radio is a central control and display unit for all the entertainment and communication systems integrated into the vehicle. It can also be controlled via the control buttons on the multifunction steering wheel (MFL).

Fig 2: Identifying Radio In Center Console

Courtesy of MERCEDES-BENZ USA

The radio is installed in the center console.

The following system components integrated in the device are controlled by the radio:

Radio tuner
Basic audio amplifier
CD audio

Moreover, the following external components are controlled:

Amplifier for sound system (N40/3) (code (810) Sound system)
CD changer (A2/6) (code (819) 6-disk CD changer)
Universal Portable CTEL Interface (UPCI [UHI]) control unit (N123/1) (code (388) Telephone "Handy", UPCI system)

Overview of the full equipment

Left view, without speaker

Fig 3: Overview Of Full Equipment (Left)

Courtesy of MERCEDES-BENZ USA

Overview of the full equipment Right view, without speaker

Fig 4: Overview Of Full Equipment Right View Without Speaker

Courtesy of MERCEDES-BENZ USA

Fig 5: Full Equipment Block Diagram

Courtesy of MERCEDES-BENZ USA

Block diagram, full equipment

Function requirements:

When circuit 15R is activated, the functions are available to the radio. If circuit 15R is not activated, the MOST subscribers are rendered active when the radio is switched on. In this case, control using the multifunction steering wheel is not possible.

Radio reception

Integrated into the radio are 2 radio tuners, which can be controlled via the controller unit. Operation via the interface is generated by the radio and shown on the display. The audio signals are amplified by the radio and then output via the vehicle speakers. With code (810) Sound system, the audio signals are routed to the amplifier for sound system, amplified there, and output over the vehicle speakers.

Playing audio CDs

The single-slot drive beneath the radio display and the CD changer (code (819) 6-disk CD changer) can play CD audio media (in Red Book audio format). Underneath the single-slot disk drive is the button for ejecting the CD ("Disc Eject").

Audio signal control

The radio manages the audio sources, such as CD changer (code (819) 6-disk CD changer) and amplifier for sound system (code (810) Sound system). These audio sources can be controlled via MOST. An external analog audio source can be connected to the radio via the AUX jack in the glove box. Data exchange via a discrete line.

Making phone calls

The portable CTEL (A34/6) is inserted into the UPCI [UHI] portable CTEL holder (Universal Handy Interface) (A34/15) and is thereby connected to the Universal Portable CTEL Interface (UPCI [UHI]) control unit. The telephone feature is included in the UPCI (Universal portable CTEL Interface) control unit. The system is operated via the radio. The Universal Portable CTEL Interface (UPCI [UHI]) control unit is connected to the radio via MOST.

Audio 20 volume/tone settings, function		GF82.60-P-2010GZ
Audio 20 audio functions		GF82.60-P-2011GZ
Telephone mode, function	with code (386) Preinstallation for portable CTEL UPCI [UHI] system with code (388) Universal Portable CTEL Interface System	GF82.85-P-2007GZA