Left/right rear display, component description - GF82.90-P-4020SX

MODEL 221.0/1 with CODE (864) Rear entertainment system except CODE (494) USA version up to Model Year 8

Location

Fig 1: Identifying Left/Right Rear Display

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Light Sensor, ON/OFF Switch, Setting Volume Buttons And Headphone Connection

Courtesy of MERCEDES-BENZ USA

The rear displays (left rear display and right rear display) belong to the seat delivery contents and are installed in the front seat head restraints.

Task

The rear displays are used for visualization of all application-relevant data in the rear entertainment system.

These are e.g. the graphical displays for user guidance, operation and the display of video signals from the TV combination tuner (analog/digital) (A90/1) or the audio/video controller control unit (N66/3).

Function

Along with an on/off switch for activation of the rear entertainment system, buttons for regulating brightness and volume are also available.

All displays are generated and managed in the audio/video controller control unit. The RCP [HBF] control unit (N72/2) is used to control the rear entertainment functions.

Transmission of audio and video data from the audio/video controller control unit to the left rear display and to the right rear display is performed using the standardized digital LVDS transmission method (L ow V oltage D ifferential S ignaling).

Communication between the displays, the audio/video controller control unit and other components in the rear entertainment system takes place over the telematics CAN.

Design

8"-TFT color display, horizontally pivotable
Display in 15:9 format
Maximum resolution, 800 x 480 dpi, 3 x 6 bit color depth
Integrated light sensor for measuring ambient brightness
Integrated audio amplifier for headphone connection (3.5 mm)
LVDS interface for reception of video and audio signals
Telematics CAN interface for exchanging data

Located under the rear displays is a control bar with the following controls:

Light sensor
On/off switch (ON/OFF button) for switching system or displays on and off
Buttons -/+ for regulating brightness (display background illumination)
Buttons -/+ for regulating volume "VOL"
Headphone socket