Satellite Digital Audio Radio (SDAR) Control Unit, Component Description - GF82.85-P-3121GRU
MODEL 166
up to model year 2016
with CODE 536 (SIRIUS satellite radio)
Illustrated on model 166.0
Fig 1: Satellite Digital Audio Radio (SDAR) Control Unit Component Location - Model 166.0 Up To Model Year 2016
Location
The SDAR control unit is located beneath the left front seat.
Tasks
- Receive signals
- Amplifying and decoding signals
- Transmitting signals
Receive signals
Signals are read in via the following connections:
- Direct line
- Media Oriented System Transport (MOST)
Direct lines
- Circuit 30g
- Circuit 31
- Wake-up
- Multifunction antenna (A28/11) (for satellite signals and terrestrial signals)
MOST
- Control signals from audio equipment
Amplifying and decoding signals
The SDAR control unit decodes and amplifies the satellite signals (Time For Division Multiplex (TDM)) and terrestrial signals (Coded Orthogonal Frequency Division Multiplex (COFDM)) into pulse code modulation (PCM) signals.
Transmitting signals
- Direct line
- MOST
Direct line
- Multifunction antenna (power supply to antenna, remote supply over antenna input)
MOST
- Audio signals to the sound system amplifier control unit (N40/3) (with CODE 810 (Sound system) or CODE 811 (Advanced sound system))
- Status of SDAR control unit, program-specific supplemental information (e.g. artist, track name and composer) as well as music genre (e.g. "ROCK", "NEWS") to the COMAND controller unit
- Demodulated and decoded digital S-band satellite as well as S-band terrestrial signals as digital traffic and weather data signals to the navigation unit integrated into the COMAND controller unit
| Satellite Digital Audio Radio System (SDAR) wiring diagram | Model 166 up to model year 2016 with code 536 (SIRIUS satellite radio) | PE82.60-P-2300-97NAA |