Electrical -- Basic Knowledge -- Audio System: Adjustments Mercedes-Benz E-class W212/S212/C207/A207

Volume/tone adjustments, function - GF82.60-P-2003T

MODEL 211.0/2 up to 31.5.06 with CODE (525) MB Audio 50 APS radio

All volume and sound adjustments are performed on the radio control panel and navigation unit (A2/56) and transmitted via the MOST to the audio gateway control unit (N93/1). A distinction must be made between audio and service sources. Audio sources are, for example

1. Radio
2. CD player

Service sources are for example

1. Traffic radio announcements
2. Telephone and code (813b) voice control system (VCS)
3. Voice output with navigation system

Volume setting

The volume of whatever audio source is set can be adjusted using the rotary switch on the radio control panel and navigation unit (A2/56). It can be adjusted separately in all audio and service areas.

With the RESET function, the predefined settings for all sound parameters including volume can be selected and reset to the plant adjustment.

In the "Audio" menu the difference between the volume of the audio signal and the voice output for navigation, with code (813) voice control system (VCS) and traffic announcements can be adjusted. This means that voice output remains audible even in the case of loud audio output.

The volume of the voice output can also be changed during a voice output.

Official emergency broadcasts have priority over all other audio sources. Settings made during navigation voice output apply as the absolute level for the subsequent navigation voice output.

Speed-dependent volume control/dynamic range optimization

Via the speed-dependent volume control (GAL) and automatic vehicle interior noise adaptation Dynamic Range Optimization (DRO) the volume is adapted to the vehicle interior noise backdrop. In the process the vehicle speed signal and signal input to the sound amplifier microphone (B25/6) are used as a relationship indicator.

Mute (volume reduction)

If the user presses the "Mute" key, the audio source currently being listened to is muted, CC drive and Audio CD drive change to pause status.

Tone setting

The radio control panel and navigation unit (A2/56) enables manual sound adjustments for each audio source. Pressing the main button for the sound setting in the left panel area leads to the "Sound" menu, in which the desired settings can be made.

They can be set separately for each function, such as radio, CD, cassette, traffic announcements, code (813) voice control system (VCS), telephone, navigation, TV and MP3-CD. The following sound adjustments are possible

1. Language
2. Ambiance
3. Driver

With a change in sound emphasis (balance, fader) the ratio of the volume of the individual speakers changes. The "Balance" and "Fading" adjustments can be achieved by pressing the main key for sound distribution in the left control panel. Processing of the signals for the required volume adjustments and tone adjustments is performed by the audio component integrated into the audio gateway control unit (N93/1). If the vehicle is equipped with code (810) Sound System, additional spatial sound adjustments and a further final amplification of the audio signals are possible by means of the digital sound processor with its expanded sound processing and amplifier stages.

Volume/tone adjustments, function - GF82.60-P-2003TA

MODEL 211.0/2 up to 31.5.06 with CODE (527) COMAND APS (with navigation)

All volume/sound settings are performed in the COMAND operating, display and control unit (A40/3) and are transmitted via the MOST (Media Oriented System Transport) to the audio gateway control unit (N93/1).

The signal processing required for the volume and sound settings is performed via the audio component integrated into the audio gateway control unit (N93/1).

The audio amplifier is located in the audio gateway control unit (N93/1). If the vehicle is equipped with code (810) Sound system, a digital sound processor enables additional stereo sound settings and an extended final amplification of the audio signals to be performed

Volume setting

The volume of whatever audio source is set can be adjusted using the rotary switch on the COMAND operating, display and control unit (A40/3). This can be adjusted separately in all audio and service areas (telephone, audio).

With the RESET function, the programmed settings for all sound parameters including volume can be selected and reset to the manufacturer default setting.

In the "Audio" menu, the difference between the volume of the audio signal and the voice output for navigation, voice control system (VCS) and traffic announcements can be adjusted. This means that voice output remains audible even in the case of loud audio output.

The volume of the voice output can also be changed during a voice output.

Tone setting

The COMAND operating, display and control unit (A40/3) allows manual tone settings (bass, treble, balance, fader) for each audio source. Pressing the main button for the sound setting in the left panel area leads to the "Sound" menu, in which the desired settings can be made. They can be adjusted separately for each function (e.g. CD, radio reception, traffic announcements). The following sound adjustments are possible

1. Language
2. Ambient
3. Driver

With a change in sound emphasis (balance, fader) the relative ratio of the volume of the individual speakers changes. "Balance" and "Fader" settings can be performed by pressing the main function key for sound distribution in the left control panel.

Official emergency broadcasts have priority over all other audio sources. Settings made during navigation voice output apply as the absolute level for the subsequent navigation voice output

Speed-dependent volume control (SDV) and Dynamic Range Optimization (DRO)

Speed-dependent volume control (SDV) and dynamic range optimization (DRO) are used to adapt the volume to the noise level in the vehicle interior. In the process the vehicle speed signal and signal input to the sound amplifier microphone (B25/6) are used as a relationship indicator.

Mute

If the user presses the "Mute" function key, the audio source currently being listened to is muted and the CD drives change to a pause status.

Volume/tone adjustments, function - GF82.60-P-2003TC

MODELS 211.0/2 as of 3/1/03

All volume and tone settings are made at the radio (A2). It is necessary to distinguish between audio sources and service sources

Audio sources are

1. Radio
2. CD player

Service sources include

1. Traffic radio announcements
2. Telephone

Volume setting

The volume setting for each of the selected audio sources is controlled by the rotary knob on the radio (A2). In addition, the volume can be set separately in all audio and service areas (telephone, traffic information radio channel). The Traffic Program Volume (TPV) softkey assignment allows the volume for the traffic information to be increased or decreased. The RESET function allows predefined settings for the sound parameters including volume to be selected and reset to the factory settings.

Speed-dependent volume control/dynamic range optimization

The volume in the vehicle interior is adapted via speed-dependent volume control (GAL) and automatic vehicle interior noise adaptation, known as Dynamic Range Optimization (DRO).

In the process the vehicle speed signal and signal input to the sound amplifier microphone (B25/6) are used as a relationship indicator.

Mute (volume reduction)

If the user presses the "Mute" function key, the audio source currently being listened to is muted, and the audio CD drives change to pause status. The muting function status can also be triggered automatically.

The following mutings are possible

1. TAXI-MUTE
2. TEL-MUTE
3. DOOR-SENSOR-MUTE
4. TP MUTE

If the vehicle has a factory-installed telephone, the radio (A2) switches to telephone mode in the event of a call, and the audio source is muted.

Tone setting

The radio (A2) has manual tone settings (bass, treble, balance, fader) available for each audio source.

The AUDIO function status can be accessed from every other function state except AUTO-ON.

In display field 2, the bass is displayed as the first tone setting called up.

By pressing the "AUDIO" function key repeatedly, the other tone controls for treble, balance (left/right), fader (front/rear), TPV (increased volume for traffic announcements) can be accessed. The messages for the "AUDIO" function status are shown in display field 1. The tone control only relates to the active system function status.

With a change in sound emphasis (balance, fader) the ratio of the volume of the individual speakers changes.

The "Balance" and "Fader" settings are accessed by pressing the main function key for sound distribution in the left control field.

Processing of the signals for the required volume and tone adjustments is done by the integrated audio component. The volume for information services can be set separately.

Volume/tone adjustments, function - GF82.60-P-2003TJ

MODEL 211.0/2 with CODE (529) HIGH Class Japan

All volume and sound adjustments are performed at the COMAND operating, display and control module (A40/3) and transferred via the MOST optical fiber ring to the audio gateway control module (N93/1).

The audio component, which is integrated into the audio gateway control unit (N93/1), processes the signals necessary for volume and sound adjustments.

The audio amplifier is located in the audio gateway control unit (N93/1). By means of the digital sound processor with its expanded sound processing stage and amplifier stage, additional room sound adjustments and a further final amplification are possible

Volume setting

The volume adjustment is regulated at the rotary controller of the COMAND operating, display and control module (A40/3) in each case for the audio source adjusted. It can be adjusted separately in all audio and service areas (telephone, audio).

The difference between the volume of the audio signal and voice output for navigation, voice control system and traffic reports can be adjusted in the "audio" menu. This means that voice output remains easily audible even in the case of loud audio output. The volume of the voice output can also be changed during a voice output.

Sound adjustment

The COMAND operating, display and control module (A40/3) makes possible manual sound adjustments (bass, treble, balance, fader) for each audio source.

The "Sound" menu in which the desired adjustment can be performed is reached via the main function key for tone adjustment in the left you reach the "Sound" menu where the desired adjustment can be made.

It can be adjusted separately for each function such as radio, CD, MD, traffic announcements, VCS, telephone, navigation and TV. With a change in sound emphasis (balance, fader) the ratio of the volume of the individual speakers changes.

The "Balance/Fading" adjustments can be reached by pressing the main function key for sound distribution in the left control panel.

A catastrophe message has priority over all other audio sources. Settings made during navigation voice output apply as the absolute level for the subsequent navigation voice output

SDV/dynamic range optimization

Via speed-dependent volume control (SDV) and automatic vehicle interior noise adaptation, Dynamic Range Optimization, the volume is adapted to the background noise in the vehicle interior. In the process the vehicle speed signal and signal input to the sound amplifier microphone (B25/6) are used as a relationship indicator.

Mute (volume reduction)

If the user presses the "Mute" function key, the audio source currently being listened to is muted, MD and audio CD disk drives go over to standby.

Volume/tone adjustments, function - GF82.60-P-2003TJA

MODEL 211, 219 with CODE (527) COMAND APS with single DVD drive (with navigation) with CODE (498) Japan version as of Model Year 9/AEJ 07

General information

All volume and tone settings can be made on the COMAND operating display and controller unit (A40/3). This is performed either by the user or automatically by the speed-dependent volume control (SDV [GAL]). The volume and sound setting function can be conducted as follows

1. General function sequence for volume adjustment on right multifunction steering wheel button group (S111)
2. Function sequence, general volume adjustment and general, expanded tone settings over control buttons and rotary actuator on COMAND operating, display and controller unit
3. SDV (GAL) function sequence, except code 810 Sound system

In addition to the general tone settings such as bass, treble, balance and fader, the COMAND operating, display and controller unit on vehicles with code 810 Sound system also has the "Pro Logic 7" surround sound function

Operating instructions

The volume/tone settings can be made using the following components

1. The + and - buttons for setting specific functions and volume control (S111s1) on the multifunction steering wheel (MFL)
2. Using the rotary switch of the COMAND operating, display and controller unit

Function requirements

1. Status "Circuit 30 ON"
2. The COMAND operating, display and controller unit is switched on and an audio source is operating

General volume setting function sequence on right multifunction steering wheel button group

Pressing the + and - buttons for setting specific functions and volume control enables the volume for the desired audio function to be increased or reduced.

The control signals are routed to the COMAND operating, display and controller unit over the following path

1. Steering Local Interconnect Network (LIN)
2. Steering column tube module (N80)
3. Controller area network bus, class B (interior compartment) (CAN B)
4. Instrument cluster (A1)

The tone settings are indicated on the display of the COMAND operating, display and controller unit. The volume setting can be carried out separately for each audio source. Predefined settings can be selected and reset to the manufacturer default setting via the system settings

Function sequence, general volume adjustment and general, expanded tone settings over control buttons and rotary actuator on COMAND operating, display and controller unit

The COMAND operating, display and controller unit allows the volume and tone settings (bass, treble, balance, fader and tone options) to be set manually for each audio source with the rotary actuator. The required tone settings can be performed via the "Sound" menu. They can be set separately for each function (e.g. CD, radio reception, traffic announcements). The control signals are read in and evaluated within the COMAND operating, display and controller unit.

The desired settings are transferred to the sound system amplifier (N40/3) via the Media Oriented Transport System (MOST) on vehicles with code 810 Sound system, and vehicles with code 810 Sound system also have the Pro Logic 7 tone option.

If the tone emphasis is changed (balance, fader) the volume relationship between the individual speakers changes relative to each other.

In vehicles except code 810 Sound system the selected settings are processed internally, amplified and then emitted at the speaker system

Function sequence for speed-dependent volume control

The speed-dependent volume control can be used to adapt the volume to the noise level in the vehicle interior. In this case, the vehicle speed signal is used as the reference value. This procedure will run automatically. After evaluating the relationship indicator, the audio output is matched to the noise level in the vehicle interior.

The COMAND operating, display and controller unit increases or decreases the output level of the audio signals (GAL) depending on the vehicle speed signal.

The vehicle speed signal travels to the COMAND operating, display and controller unit over the following path

1. Instrument cluster
2. CAN-B

In vehicles with code 810 Sound system, the audio signals are output by the COMAND operating, display and controller unit via the MOST to the amplifier for the sound system, from where they are sent to the following speakers via direct lines

1. Left front door speaker group (H4/1)
2. Right front door speaker group (H4/2)
3. Left rear door speaker group (H4/3)
4. Right rear door speaker group (H4/4)
5. Bass box speaker (H4/17)
6. Center cockpit speaker (centerfill) (H4/27)
7. Left rear surround speaker (H4/54)
8. Right rear surround speaker (H4/57)

The audio signal for the bass box speaker travels via MOST from the "audio equipment" to the sound system amplifier and from there, via the subwoofer amplifier (N40/9), along direct lines to the bass box speaker

In vehicles except code 810 Sound system, the audio signals and data are output by the "Audio equipment" on the following speakers via direct lines

1. Left front door speaker group
2. Right front door speaker group
3. Left rear door speaker group
4. Right rear door speaker group
5. Center cockpit speaker (centerfill)

Volume/tone adjustments, function - GF82.60-P-2003TM

MODEL 211, 219 with CODE (523) MB Audio 20 radio with CODE (510) Audio 20 with CD changer as of Model Year 9/AEJ 07

Function requirements

1. Status "Circuit 30 ON" or "Circuit 15R ON"
2. Radio (A2) is authorized and operating properly
3. Audio source in operation

General information

All volume and tone settings are performed using the radio. This is accomplished either by the user or automatically by the radio with the aid of the speed-dependent volume control (GAL).

The radio with code 510 Audio 20 with CD changer comes not only with the general tone settings such as bass, treble, balance and fader, but is also equipped with extra tone settings. These are

1. Surround Logic 7 On/Off, with code 810 Sound system

The volume can be set as follows

1. With the + and - buttons, for selecting specific functions and volume control (S111s1) in the right multifunction steering wheel button group (S111)
2. With control buttons and rotary actuator of the radio

All tone settings are made via the control buttons and the rotary actuator on the radio.

The volume is adjusted via the right multifunction steering wheel button group

Pressing the + and - button for setting specific functions and volume control increases or reduces the volume for the required audio function.

The control signals are forwarded via the following path to the radio

1. Steering Local Interconnect Network (LIN)
2. Steering column tube module (N80)
3. Instrument cluster (A1)
4. Controller area network bus, class B (interior compartment) (CAN B)

After evaluating the control signals, the desired settings on vehicles with code 510 Audio 20 with CD changer and code 810 Sound system are transmitted via the Media Oriented System Transport (MOST) to the sound system amplifier (N40/3) and then output on the following speakers

1. Left front door speaker group (H4/1)
2. Right front door speaker group (H4/2)
3. Left rear door speaker group (H4/3)
4. Right rear door speaker group (H4/4)
5. Bass box speaker (H4/17)
6. Center cockpit speaker (centerfill) (H4/27)
7. Left rear surround speaker (H4/54)
8. Right rear surround speaker (H4/57)

The bass box speaker audio signal travels from the radio control panel and navigation unit to the sound system amplifier via MOST and from there, via direct lines to the bass box speaker via the subwoofer amplifier (N40/9)

For vehicles except code 810 Sound system or with code 523 MB Audio 20 radio, the audio signals are finally amplified in the radio control panel and navigation unit and then sent to the following speakers via direct lines

1. Left front door speaker group
2. Right front door speaker group
3. Left rear door speaker group
4. Right rear door speaker group
5. Center cockpit speaker (centerfill)

Volume adjustment and general, extended tone settings over the control buttons and rotary actuators of the radio

Operating the radio's rotary actuator enables the volume to be raised or lowered for the desired audio function. Pressing the "Tone setting" button on the radio, enables the user to make all the general or extended tone settings. The control signals are read in and evaluated within the radio. The transmission of the settings and the speaker output is performed in the same way as described for the volume adjustment via the right multifunction steering wheel button group.

Function sequence for speed-dependent volume control

The speed-dependent volume control can be used to adapt the volume to the noise level in the vehicle interior. The speed signal from the instrument cluster is used as a reference value for this function. The speed signal is transferred to the radio over the following path

1. Instrument cluster
2. CAN-B

This procedure will run automatically. After evaluating the relationship indicator, the audio output is matched to the noise level in the vehicle interior.

Depending on the vehicle speed signal, the radio raises or lowers the output level of the audio signals. The transmission of the settings and the speaker output is performed in the same way as described for the volume adjustment via the right multifunction steering wheel button group.

Volume/tone adjustments, function - GF82.60-P-2003TU

MODEL 211.0/2 up to 30.6.06 with CODE (528) HIGH Class USA

All volume/sound settings are performed in the COMAND operating, display and control unit (A40/3) and are transmitted via the MOST (Media Oriented System Transport) to the audio gateway control unit (N93/1).

The signal processing for the volume/sound settings is taken over by the audio component integrated in the audio gateway control unit (N93/1).

The audio amplifier is located in the audio gateway control unit (N93/1). If the vehicle is equipped with the audio gateway control unit and code (810) sound system, additional space sound settings and a further final amplification of the audio signals are possible through the digital sound processor (DSP2) with its enhanced sound processing and amplifier stage

Volume setting

The volume adjustment is controlled in each case for the audio source adjusted at the rotary controller of the COMAND operating, display and control unit (A40/3). It can be adjusted separately in all audio/service areas (telephone, audio).

With the RESET function predefined adjustments can be selected for all sound parameters including volume and reset to the plant adjustment.

The difference between the volume of the audio signal and the voice output for navigation, code (813) voice control system (VCS) and traffic announcements can be set in the "Audio" menu. This means that voice output remains easily audible even in the case of loud audio output.

The volume of the voice output can also be changed during a voice output.

Tone adjustment

The COMAND operating, display and control unit (A40/3) makes possible manual tone settings (bass, treble, balance, fader) for each audio source.

Via the main function button for sound adjustment in the left control panel the "Sound" menu is reached, in which the desired setting can be performed. This can be adjusted separately for each function such as radio, CD, traffic announcements.

The following sound adjustments are possible

1. Speech
2. Ambiance
3. Driver

With a change in sound emphasis (balance, fader) the ratio of the volume of the individual speakers changes.

The "Balance/Fading" adjustments can be achieved by pressing the main function key for sound distribution in the left operator panel and after this via the submenus.

A catastrophe message has priority over all other audio sources. Settings made during navigation voice output apply as the absolute level for the subsequent navigation voice output

DRO/Dynamic range optimization

The volume of the background noise in the vehicle interior is adapted via speed-dependent volume control (GAL) and automatic vehicle interior noise adaptation, Dynamic Range Optimization. In the process the vehicle speed signal and signal input to the sound amplifier microphone (B25/6) are used as a relationship indicator.

Mute (volume reduction)

If the user presses the function key "Mute", the audio source currently being listened to is muted and the CD drives change to a pause status.

Volume/tone adjustments, function - GF82.60-P-2003TXB

MODEL 211, 219 with CODE (511) Audio 50 APS with DVD changer with CODE (525) MB Audio 50 APS radio as of Model Year 9/AEJ 07

General information

All volume and tone settings are made using the radio control panel and navigation unit (A2/56). This is performed either by the user or automatically by the speed-dependent volume control (SDV [GAL]). The volume and sound setting function can be conducted as follows

1. Function sequence for general volume setting via the left multifunction steering wheel button group (S110) or the right multifunction steering wheel button group (S111)
2. Function sequence for general volume setting using the rotary switch of the radio control panel and navigation unit
3. Function sequence for general, extra tone settings using the control buttons of the radio control panel and navigation unit
4. Function sequence for speed-dependent volume control

The radio control panel and navigation unit comes not only with the general tone settings such as bass, treble, balance and fader, it also is equipped with extra tone settings. For vehicles with code 810 Sound system via the Pro Logic 7 function

Operating instructions

The volume can be set as follows

1. Using the buttons + and - for setting specific functions and volume control (S111s1) on the multifunction steering wheel (MFL)
2. Using the rotary switch of the radio control panel and navigation unit

The tone can be set as follows

1. Using the rotary switch and control buttons on the radio control panel and navigation unit

Function requirements

1. Status "Circuit 30 ON" or "Circuit 15R ON"
2. The Auto pilot system (APS) is working correctly
3. Audio source in operation

Function sequence for general volume setting using the multifunction steering wheel button group

Pressing the + and - button for setting specific functions and volume control enables the volume for the desired audio function to be increased or reduced.

The control signals are forwarded via the following path to the radio control panel and navigation unit

1. Steering Local Interconnect Network (LIN)
2. Steering column tube module (N80)
3. Controller Area Network bus Class C (engine compartment) (CAN-C)
4. Instrument cluster (A1)
5. Controller area network bus, class B (interior compartment) (CAN B)

Function sequence for general volume setting using the rotary switch of the radio control panel and navigation unit

The radio's rotary switch can be used to set the volume. The signal path is then an internal one.

Function sequence for general, extra tone settings using the control buttons of the radio control panel and navigation unit

The control buttons can be used on the radio control panel and navigation unit to manually set the tone (bass, treble, balance, fader as well as tone options) for each audio source.

The required tone settings can be performed via the "Sound" menu. They can be adjusted separately for each function (e.g. Compact Disk (CD), radio reception, traffic announcements).

The volume and tone settings are displayed on the screen of the radio control panel and navigation unit. The tone setting can be carried out separately for each audio source. Predefined settings can be selected and reset to the manufacturer default setting via the system settings. Vehicles with code 810 Sound system are also equipped with the Pro Logic 7 tone option. The control signals are read in and evaluated within the radio control panel and navigation unit

Function sequence for speed-dependent volume control

The speed-dependent volume control can be used to adapt the volume to the noise level in the vehicle interior. In this case, the vehicle speed signal is used as the reference value. This procedure will run automatically. After evaluating the relationship indicator, the audio output is matched to the noise level in the vehicle interior. Depending on the vehicle speed signal, the radio control panel and navigation unit raises or lowers the output level of the audio signals (speed-dependent volume control).

The vehicle speed signal is forwarded to the radio and navigation unit via the following path

1. Instrument cluster
2. CAN-B