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Satellite radio, component description - GF82.85-P-3105CWU

MODEL 204.0 with CODE (536) SIRIUS satellite radio 

Illustrated on model 204.0 

Location 

The satellite digital audio radio (SDAR) control unit is located in the trunk under the trunk mat on the crossmember.

Fig 1: Locating Satellite Digital Audio Radio (SDAR) Control Unit
G07532290Courtesy of MERCEDES-BENZ USA

Task 

The satellite digital audio radio (SDAR) control unit enables the "Sirius Satellite Radio" provider stations to be received.

Function 

The multifunction antenna (A28/11) receives all 3 channels (Sat 1, Sat 2, terrestrial station). It forwards the signals over a coaxial cable to the satellite digital audio radio (SDAR) control unit. The satellite digital audio radio (SDAR) control unit receives and decodes the signals. Finally the satellite digital audio radio (SDAR) control unit transmits the decoded, digital radio signals over the Media Oriented System Transport (MOST) to the radio and for vehicles with code (810) Sound system to the sound system amplifier control unit (N40/3).

Audio signal output then takes place over discrete lines through the following speakers: