Sound amplifier, component description - GF82.62-P-3009GZJ

MODEL 164.1/8, 251 with CODE (498) Japan version with CODE (810) Sound system up to Model Year 2008

Shown on model 164.1

Fig 1: Identifying Amplifier For Sound System - Shown On Model 164.1

Courtesy of MERCEDES-BENZ USA

Location

The amplifier for the sound system is installed below the driver's seat.

Shown on model designation 251

Fig 2: Identifying Amplifier For Sound System - Shown On Model 251

Courtesy of MERCEDES-BENZ USA

Location

The amplifier for the sound system is installed below the driver's seat.

Task

The amplifier for the sound system includes:

Linear amplifier stages
High resolution digital filter structures for the equalizer
Electronic circuitry for digital signal processing

The amplifier for the sound system operates using state-of-the-art digital signal processing technology. This means that it operates with the objective of improving the acoustic tone characteristics for the audio range, audio tracks using mathematical algorithms. All input and control signals for the sound system amplifier come over the Media Oriented System Transport bus (MOST). The amplifier for sound system is operated by the COMAND operating, display and control unit (A40/3) and it also provides all the menus for user control.

Dynamic volume adaptation

The sound system amplifier is equipped with a dynamic volume adaptation feature. The interior noise is measured by a separate sound amplifier microphone (B25/6) for dynamic volume adaptation. The volume is dynamically adapted to the interior volume level on the basis of the interior volume measured. The sound amplifier microphone is located in the overhead control panel control unit (N70).

Announcement channels

Bass, treble, volume
Balance, fader (for navigation)

Entertainment channels

In the entertainment channels the following can be adjusted individually:

Bass, treble, volume
Balance, Fader

The user can also operate a nine-channel equalizer to alter the sound. However, the sound presets (Standard, Surround Logic 7) can also be called up.

Location shown on model 164.1 prior to production period 31.05.2006

Fig 3: Identifying Sound Amplifier Microphone - Shown On Model 164.1

Courtesy of MERCEDES-BENZ USA

The sound amplifier microphone is located in the overhead control panel control unit.

Location shown on model 164.1 as of production period 01.06.2006

Fig 4: Identifying Sound Amplifier Microphone - Shown On Model 164.1

Courtesy of MERCEDES-BENZ USA

The sound amplifier microphone is located in the base of the inside rearview mirror.

Location shown on model 251 prior to production period 31.05.2006

Fig 5: Identifying Sound Amplifier Microphone - Shown On Model 251

Courtesy of MERCEDES-BENZ USA

The sound amplifier microphone is located in the overhead control panel control unit.

Location shown on model 251 as of production period 01.06.2006

Fig 6: Identifying Sound Amplifier Microphone - Shown On Model 251

Courtesy of MERCEDES-BENZ USA

The sound amplifier microphone is located in the base of the inside rearview mirror.

Function

The sound amplifier microphone measures the interior noise in the vehicle and forwards the determined values to the amplifier for sound system. The sound system amplifier evaluates the readings and adapts the volume of the active audio source.