The Rear Display equipment enables operation of the Rear Entertainment functions:
With 'Rear Entertainment' equipment, the functions of the display and operating concept for the rear correspond to the display and operating concept for the front. The user interfaces are identical; the components are different. The Rear Controller (FCON) is used to operate the Rear Display equipment.
For the control unit Rear Display, the following is displayed on the tester:
For the display units, the following is displayed on the tester:
The Rear Display (FD) is fitted in the backrest of the driver's seat. The Rear Display (FD) is connected to the Rear Display control unit by an LVDS cable (Low Voltage Differential Signalling) (digital RGB cable) for graphical representation.
The Rear Display 2 (FD 2) is fitted in the backrest of the passenger seat. The Rear Display 2 (FD 2) is connected to the Rear Display control unit by an LVDS cable (Low Voltage Differential Signalling).
In principle, the rear centre console switch centre has the same function as the front centre console switch centre. The BZMF contains the rear centre armrest button blocks and the headphone connection module.
When the headphones are connected, the folding Rear Controller (FCON) is the operating unit to control the Rear Entertainment functions at the Rear Display (FD) and Rear Display 2 (FD 2). If no headphones are connected, the overall function is operated at the front and rear. Operation and structure of the Rear Controller (FCON) are identical to those of the Controller in the front (CON). However, the functions for front and rear are different.
The K-CAN SYSTEM data bus is the data connection between the instrument cluster and the control units in the chassis and suspension, drive and body sections. Information is exchanged with data telegrams.
The MOST (Media Oriented Systems Transport) bus links the audio, video and navigation systems. Information relating to function requests is transmitted to all control units by means of MOST bus messages. The control units detect when they are activated by requests and confirm receipt of the telegram.
Starting up: the Rear Displays (FD, FD 2) can be started up when terminal R is active.
When the Rear Displays (FD, FD 2) are supplied with voltage, the same display as at the front Central Information Display (CID) appears. The Rear Controller (FCON) can then be used to select a function.
NOTE: The Rear Displays (FD, FD 2) can also be operated with terminal 30. Here, the system must be activated by pressing the Volume rotary pushbutton on the Audio Display Panel (ADP). The Volume rotary pushbutton switches the Audio Display Panel (ADP) and Audio System Controller (ASK) on and off.
Setting the brightness: A photocell is built into the casing of the LC display for measurement of the surrounding brightness. The value determined by the photocell is compared with the set brightness values. If there is a difference between the values, the LC display is adapted to the ambient brightness by brightening or darkening. This process (dimming) ensures good readability of the screen at all times.
The Rear Display control unit is supplied with a number of data formats. Digital data packets, e.g. travel guides, are supplied via the MOST connection. The analog video signals are fed from the video module 5 or video module 5 Drive through an RGB input. The control signals come the K-CAN SYSTEM data bus The voltage supply is applied by means of a separate cable.
The Rear Display control unit generates digital picture data. The digital picture data is transferred across an LVDS cable (Low Voltage Differential Signalling) for graphical representation on the Rear Display (FD) and Rear Display 2 (FD 2).
The functions in the vehicle are provided by various control units. The users in the rear access the same control units as the users in the front. In order to prevent conflicts when accessing one function, rules have been laid down for certain functions (see: Headphone interface functions).
If a certain voltage is not reached in the vehicle battery, the power module (PM) switches the 'Rear Entertainment' equipment off.