LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercedes Benz >> 2009 >> S600 >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> COMAND, Entertainment & Navigation -- Basic Knowledge -- S-Class (221) >> Basic Knowledge >> Audio mode, function - GF82.85-P-2030LEU
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Audio mode, function - GF82.85-P-2030LEU

MODEL 216, 221 with CODE (530) COMAND APS USA (with navigation system) as of model year 2009 /YoM 08 

Function requirements, general 

General information on the audio mode 

The audio mode consists of the following component functions:

The following components are available for control of the audio system:

Function sequence for radio mode (AM/FM) 

The antennas structures in the rear window receive signals for the FM and AM (MW) radio frequency bands.

The following useful signals relevant for the radio reception are modulated onto these signals:

These signals are routed over direct lines to the rear window antenna amplifier module (A2/12). The rear window antenna amplifier module filters the radio frequency band frequencies from the received signals, and amplifies them.

The amplified signals are then sent over coaxial cables (FM, AM) to the audio tuner control unit (N93/1) (up to 31.5.09) or to the high definition tuner control unit (N87/8) (as of 1.6.09) where they are demodulated.

The high definition tuner control unit sends the audio signals over the Media Oriented System Transport (MOST) to the audio tuner control unit or to the digital sound processor (A2/69) (model 221 as of 1.9.10 with code (811) Advanced Sound System), which then processes and amplifies them before emitting them through the vehicle's speaker system.

The audio output in model 216 takes place using the following components:

Audio output in model 221 except 221 (as of 1.9.10) with code (811) Advanced Sound System is through the following components:

Audio output in model 221 (as of 1.9.10) with code (811) Advanced Sound System is through the following components:

IMPORTANT The woofers and bass box speaker on model 221 (as of 1.9.10) with code (811) Advanced Sound System are actuated by the sound amplifier (A2/13), which is controlled by the digital sound processor.

The user interface is generated by the COMAND controller unit (A40/3) and shown on the COMAND display (A40/8) (without code (867) SPLITVIEW) or on the SPLITVIEW display (A40/10) (with code (867) SPLITVIEW).

The radio mode (AM/FM) function is made up of the following subfunctions:

Function sequence for AM reception (MW, LW, SW) 

These useful signals are transmitted by means of amplitude modulation on the radio frequency bands. The AM tuner integrated into the audio tuner control unit demodulates these signals. In other words, it separates the useful signals (audible frequencies) from the carrier signal (inaudible).

Function sequence for FM reception 

For the FM radio frequency band, the useful signals are transmitted using frequency modulation. The FM twin tuner integrated into the audio tuner control unit demodulates these signals.

In other words, it also separates the useful signals (audible frequencies) from the carrier signal (inaudible). The audio tuner control unit also enables an automatic reception-specific changeover.

Additional function requirements for RDS reception 

Function sequence for RDS reception 

Apart from the normal radio program, many radio stations (FM) transmit additional digital information such as station names, program type (e.g. pop, culture) and traffic program identification. This information is evaluated by the COMAND controller unit and shown on the COMAND display or the SPLITVIEW display.

Disk and MP3 function sequence 

A 6-disk DVD changer is integrated into the COMAND controller unit. This DVD changer can play the following media and formats:

The user guidance for controlling the DVD functionality (e.g. track selection) and the display of supplemental information (e.g. track) take place on the COMAND display or the SPLITVIEW display.

REFER TO SYSTEM WIRING DIAGRAMS Electrical function diagram for audio mode, function Model 216
Up to 31.5.09		 PE82.60-P-2058-97CAA
Model 221
Up to 31.5.09		 PE82.60-P-2058-97SAA
REFER TO SYSTEM WIRING DIAGRAMS Electrical function schematic for SDAR function Model 216
As of 1.6.09 with code (517) HD radio		 PE82.60-P-2060-97CAA
Model 221
As of 1.6.09 with code (517) HD radio		 PE82.60-P-2060-97SAA
  Digital sound processor, component description A2/69
Model 221 as of YoM 10 with code (811) Advanced Sound System		 GF82.62-P-5011LE
  Component description for COMAND controller unit A40/3 GF82.85-P-3136LEU 
  COMAND display, component description A40/8
Without code (867) SPLITVIEW		 GF54.30-P-6110LE
  Front central operating unit, component description A40/9 GF54.21-P-4500LE
  SPLITVIEW display, component description A40/10
With code (867) SPLITVIEW		 GF54.30-P-6120LE
  Component description for high definition tuner control unit N87/8
As of 1.6.09		 GF82.60-P-5005LEU
  Audio tuner control unit, component description N93/1
Except model 221 as of YoM 10 with code (811) Advanced Sound System		 GF82.62-P-3132LES
scientia non olet · About LEMON Manuals