Car Solutions RGB-LE-V3.1

Description

Yet another video input interface for Mercedes S-Class W220. Useful for rear view camera installation.

The interface is for MOST-based COMANDs. It will not work on widescreen D2B based COMANDs.

Car video interface for Mercedes-Benz W220 allows connection and usage of external video devices such as DVD player, TV tuner, rear view camera, etc. on your built-in monitor.

Input:

Composite video (CVBS) input (external video source) x 2
Composite video (CVBS) input (rear camera source - automatically switchable) x 1
Analog RGB input (car commander original monitor output) x 1
Analog RGB input (aftermarket navigation system output) (option) x 1

Output:

Composite video (CVBS) output (video out for headrest monitor installation) x 1
RGB output (to W220 COMAND) x 1
Audio select output x 1

Switch input mode:

Possible to mute each input by operating DIP switches.
Possible to switch input source with remote control or toggle switch.
Rear view camera mode - rear view camera is switched on when the vehicle is reversing (not possible to switch to the rear mode with the toggle or the remote control).

Package Contents

RGB Converter

Dimensions: horizontal - 129mm, vertical - 75mm, height - 21mm.

POWER

This port is used to connect power cable with fuse box.

RGB converter accepts input power: 8V~18V DC. Power consumption max 5 watt. Installed fuse has 5A 250V rating. Measured power consumption around 230mA (2.7W) of current, therefore, it should not be left connected directly to the battery. It is safe to connect the interface to ignition wire (e.g., cigarette lighter wire) since if not connected to power source, the COMAND will work in pass-through mode acting as if multimedia interface is not installed.

Wire	Description
	not connected
read	ACC (power)
gray	REV GEAR LAMP (activates rear view camera input)
blue	FMTX antenna (???)
orange	I-Drive (???)
black	GND (ground)

MODE

This port is used to connect video input source toggle switch.

AV source switching order: OEM - RGB - AV1 - AV2.

Note that rear camera av source is not switchable using input source switching. As a workaround the rear camera can be connected also to CVBS1 or CVBS2.

Note that RGB converter makes loud clicking noise when switching between sources.

IR

This port is used to connect infrared receiver for the remote control. For the 4-pin connector only 3 pins are used.

Remote Control

Key	Function
POWER	Not used
PIP	Not used
MENU	OSD implementation
OK	Make selection
UP	Move upward
DOWN	Move downward
LEFT	Move leftward (press 2 seconds long - factory mode implementation)
RIGHT	Move rightward (press 2 seconds long - factory mode implementation and reset)

Remote control is powered by CR2025 battery.

In practice only the "OK" button works, which switches between video sources (the same way as the toggle switch).

V1

This port is used to connect the first video input (CVBS1).

V2

This port is used to connect the second video input (CVBS1).

R/V

This port is used to connect the rear view camera video input.

V-OUT

This port outputs currently selected video input. Can be used to send currently displayed video to headrest monitor.

NAVI (IN)

This port is used to connect navigation input (analog RGB).

Wire	Description
	not connected
	not connected
black	GND
white	SYNC
blue	B DATA
green	G DATA
red	R DATA

OEM (IN)

This port is used to connect original video input (analog RGB).

Wire	Description
black	GND
white	SYNC
blue	B DATA
green	G DATA
red	R DATA

RGB (OUT)

This port connects to the RGB interface installed in W220 COMAND. The package comes with additional universal RGB connector (not needed for multimedia interface use with COMAND).

Wire	Description
blue	B DATA
green	G DATA
red	R DATA
while	SYNC
black	GND
yellow	ACC
orange	VIDEO S/W
	not connected

DIP S/W

DIP switch allows to skip some inputs which are not connected.

PIN	Name	Description
1	RGB INPUT SKIP	ON: Skipping RGB mode
2	CVBS1 MUTE	ON: Skipping CVBS1 input
3	CVBS2 MUTE	ON: Skipping CVBS2 input
4	CAN	ON: When installing to the Cayenne
5	OEM MUTE	ON: Skipping OEM input
6	INTERLACE	ON: Non-interlace
7	REAR MODE	ON: External rear camera installed
8	SYNC ON GREEN	ON: Sync on green (RGSB)

OEM MUTE will make multimedia interface always on and video from the COMAND itself will not be shown.

If the displayed screen vibrates, try to operate DIP switch number 6 (interlace mode) after turning power off.

SEL (OUT)

This 3-PIN port gives voltage on one PIN at a time, depending on the video source that is currently selected - REAR-SEL (white), AV1-SEL (yellow), NAVI-SEL (gray). For example, 12V output is on yellow wire when AV1 input source is chosen. Can be used to activate appropriate audio output.