Car-Interface CI-RL4-A40 User manual

Version 20:05.2022 HW CAM(V100) / (V20.3) CI-RL4-A40
Video-inserter
CI-RL4-A40
Compatible with
Mercedes Benz vehicles with
Garmin Audio30 or Audio40 infotainment
Video-inserter for front- and rear-view camera
and two additional video sources
Product features
Video-inserter for factory-infotainment systems
1 CVBS Input for rear-view camera
1 CVBS Input for front camera
2 CVBS video-inputs for after-market devices (e.g. USB-Player, DVB-T2 tuner)
Automatic switching to rear-view camera input on engagement of the reverse gear
Automatic front camera switching after reverse gear for 10 seconds
Video-in-motion (ONLY for connected video-sources)
Video-inputs NTSC and PAL compatible

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Contents
1. Prior to installation
1.1. Delivery contents
1.2. Checking the interface compatibility of vehicle and accessories
1.3. Connectors - video interface
1.4. Connectors - daughter PCB
1.5. Dip-switch settings
1.5.1. 8 dip –black
1.5.1.1. Activating the front camera input (dip 1)
1.5.1.2. Enabling the interface’s video inputs (dip 2-3)
1.5.1.3. Rear-view camera setting (dip 5)
1.5.2. 4 dip - red
2. Installation
2.1. Place of installation
2.2. Connection scheme
2.3. Installation –Daughter PCB
2.3.1. Warning notes, concerning the installation of ribbon cables
2.4. Connection –20pin picture signal cable
2.5. Connection –10pin Power / CAN cable
2.6. Analogue power supply
2.7. Power supply output
2.8. Connection –video inputs
2.8.1. Audio insertion
2.8.2. After-market front camera
2.8.3. After-market rear-view camera
2.8.3.1. Case 1: Interface receives the reverse gear signal
2.8.3.2. Case 2: Interface does not receive the reverse gear signal
2.9. Connection –external keypad
3. Interface operation by external keypad
4. Picture settings
5. Specifications
6. Frequently asked questions

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Legal Information
By law, watching moving pictures while driving is prohibited, the driver must not be
distracted. We do not accept any liability for material damage or personal injury resulting,
directly or indirectly, from installation or operation of this product. This product should only
be used while standing or to display fixed menus or rear-view-camera video when the
vehicle is moving, for example the MP3 menu for DVD upgrades.
Changes/updates of the vehicle’s software can cause malfunctions of the interface. We
offer free software-updates for our interfaces for one year after purchase. To receive a free
update, the interface must be sent in at own cost. Labour cost for and other expenses
involved with the software-updates will not be refunded.
1. Prior to installation
Read the manual prior to installation.
Technical knowledge is necessary for installation. The place of installation has to be free of
moisture and away from heat sources.
1.1. Delivery contents

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Requirements
Brand
Compatible vehicles
Compatible systems
Mercedes-Benz
Vito (W447) since about 2019
Garmin Audio30/Audio40
Only for head-units made by Garmin - not
compatbile with Audio40 made by Pioneer
Limitations
Video only The interface inserts ONLY video signals into the infotainment.
For inserting Audio signals either the possibly existing factory audio-AUX-input or
a FM-modulator can be used.
In case that 2 AV sources shall be connected, a desired audio switching will
require additional electronic.
Factory rear-view camera Automatically switching-back from inserted video to factory rear-view camera is
only possible while the reverse gear is engaged. To delay the switch-back an
additional electronic part is required.
After market front camera The front camera will automatically be switched for 10 seconds after disengaging
the reverse gear. A manually front camera switching is possible by external
keypad.
1.2. Checking the compatibility of vehicle and accessories

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1.3. connectors - video-interface
The video-interface (daughter PCB) converts the video signals of connected after-market
sources in a factory monitor compatible picture signal which is inserted in the factory
monitor, by using separate trigger options.
1.4. connectors –daughter PCB

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1.5. Dip-switch settings
1.5.1. 8 dip - black
Some settings have to be selected by the dip-switches on the
video interface.
Dip position down is ON and position up is OFF.
*The front camera will automatically be switched for 10 seconds after disengaging the
reverse gear (see following information).
After each Dip-switch-change a power-reset of the Video Interface has to be performed!
1.5.1.1. Activating the front camera input (dip 1)
If set to ON, the interface switches for 10 seconds from the rear-view camera to the front
camera input after having disengaged the reverse gear. In addition, a manual switch-over to
the front camera input is possible via keypad (short press) from any image mode.
Description of the front camera power supply: see chapter “Power supply output”.
1.5.1.2. Enabling the interface’s video inputs (dip 2-3)
Only the enabled video inputs can be accessed when switching through the interface’s video
sources. It is recommended to enable only the required inputs, disabled inputs
will be skipped when switching through the video-interfaces inputs.
Dip
Function
ON (down)
OFF (up)
1
Front camera
enabled*
disabled
Power supply
output
(red wire)
+12V (max. 3A) when reverse gear
is engaged incl. 10 seconds delay
and +12V by manual switching to
front camera by keypad
+12V (max. 3A) ACC
2
CVBS AV1-input
enabled
disabled
3
CVBS AV2-input
enabled
disabled
4
No function
Set to OFF
5
Rear-view cam type
after-market
factory or none
6
No function
Set to OFF
7
No function
Set to OFF
8
No function
Set to OFF

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1.5.1.3. Rear-view camera setting (dip 5)
If set to OFF, the interface switches to factory picture while the reverse gear is engaged to
display factory rear-view camera.
If set to ON, the interface switches to its rear-view camera input „V4 Reverse“ while the
reverse gear is engaged.
Note: Dip 4, 6, 7 and 8 are out of function and have to be set to OFF.
After each Dip-switch-change a power-reset of the Video Interface has to be performed!
1.5.2. 4 dip - red
By using the Dip-switches, the factory Head-unit or vehicle can be chosen which the
interface will be connected to.
Dip position down is ON and position up is OFF.
Set all dip switches to off
Vehicle/Navigation
Dip 1
Dip 2
Dip 3
Dip 4
All vehicles
OFF
OFF
OFF
OFF

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2. Installation
Switch off ignition and disconnect the vehicle’s battery! The interface needs a permanent
12V source. If according to factory rules disconnecting the battery is to be avoided, it is
usually sufficient to put the vehicle to “Sleep-Mode”. In case it does not succeed,
disconnect the battery with a resistor lead.
If power source is not taken directly from the battery, the connection has to be checked
for being start-up proven and permanent.
2.1. Place of installation
The video interface is designated to be connected behind the vehicle`s head unit.
The daughter PCB is prepared to be connected inside the factory head unit).

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2.2. Connection scheme

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2.3. Installation –daughter PCB
Remove the factory monitor and open the head-unit`s housing. The daughter PCB is built to
be installed into the optical lead between the monitor panel and mainboard of the vehicles
monitor.

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2.3.1. Warning notes, concernin the installation of ribbon cables
1) The contacting ends of ribbon cables always have to be installed in a straight and precise
180° position to the connector. Each deviation from a perfect contact position will curse
faulty contact and even danger of short circuit
2) The ribbon cable’s contacting side always has to correspond to the contacting side of the
connector, concerning the mounting position.
2.4. Connection –20pin picture signal cable
Connect the female 20pin connector of the daughter PCB’s pre-connected 20pin
picture signal cable to the video interface’s male 20pin connector.

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2.5. Connection –10pin Power / CAN cable
Connect the enclosed 10pin Power / CAN cable’s female10pin connector to the male 10pin
connector of the video interface.
Connect the single grey wire „CAN LOW“ of the 4 cables to the vehicle’s CAN low wire and
isolate the connection
Connect the single blue wire „CAN HIGH“ of the 4 cables to the vehicle’s CAN high wire and
isolate the connection
Connect the single red wire to stabile +12V terminal 30.
Connect the single black cable to the vehicle’s negative Ground.

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2.6. Analog power supply
If the communication between the CAN box and the vehicle’s CAN bus does not succeed (not
all vehicles are compatible), the analogue connection is required.
Connect the female 12pin connector of the 12pin interface cable to the male 12pin
connector of the video interface.
Connect the 12pin interface cable’s purple coloured wire Manual ACC to +12V Ignition power
or to +12V S-contact terminal 86s +12V (e.g. glove compartment illumination).

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2.7. Power supply output
The red power supply output ACC/front cam out 12V (max 3A) can be used to power an
external source and has a different assignment, depending on the position of dip switch 1
(of 8 dips):
Dip
Function
Dip 1 ON
+12V (max. 3A) when reverse gear is engaged plus 10 seconds delay
after reverse gear is disengaged and
+12V when manually switched to front camera by keypad (short press)
Dip 1 OFF
+12V permanent (max. 3A) ACC

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2.8. Connection –Video sources
It is possible to connect an after-market rear-view camera, an after-market front camera and
two more video sources to the video-interface.
Before the final installation, we recommend a test-run to detect a incompatibility of
vehicle and interface. Due to changes in the production of the vehicle manufacturer
there’s always a possibility of incompatibility.
Connect the 12pin interface cable’s female 12pin connector to the male 12pin connector of
the video-interface.
Connect the video RCA of the Rear-view camera to the 12pin interface cable’s female
RCA connector „Reverse V4.
Connect the front camera’s video RCA connector to the 12pin interface cable’s female
RCA connector „Front V3“.
Connect the video RCA of the AV source 1 and 2 to the 12pin interface cable’s female RCA
connector “Left (V1)” and ”Right (V2)”.

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2.8.1. Audio insertion
This interface is only able to insert video signals into the factory infotainment. If an AV-
source is connected, the audio insertion has to be done by the factory audio AUX input or an
FM-modulator. The inserted video-signal can be activated simultaneously to each audio-
mode of the factory infotainment. If 2 AV sources shall be connected to the infotainment,
additional electronic is necessary to switch the audio signals.
2.8.2. After-market front camera
The red power supply output ACC/front cam out 12V (max 3A) can be used to power a front
camera. If Dip 1 is set to ON (black 8 dips), the power supply output gives +12V (max 3A)
when reverse gear is engaged plus 10 seconds delay after reverse gear is disengaged.
Note: In addition, a manual switch-over to the front camera input is possible via keypad
(short press) from any image mode. The power supply output gives +12V then, as well (if Dip
1 is set to ON and the front camera input is selected).
Attention: A long press of the external keypad push button will switch the interface to the
next source.

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2.8.3. After-market rear-view camera
Some vehicles have a different reverse gear code on the CAN-bus which doesn’t
communicate with the interface’s CAN. In this case there are two different ways of
installation. If the interface’s CAN is able to detect an enabled vehicle’s reverse gear, the
green wire of the 12pin cable should carry +12V while the reverse gear is engaged.
Note: Do not forget to set dip5 of video-interface to ON before testing.
2.8.3.1. Case 1: Interface receives the reverse gear signal
If the interface receives +12V on the green wire of the 12pin interface cable while reverse
gear is engaged, the video interface will automatically switch to the rear-view camera input
“CAMERA-IN” while the reverse gear is engaged.
The 12 V power supply for the rear-view camera (max 3A) has to be taken from the 12pin
interface cabl’s green wire “Reverse-OUT” to avoid an unnecessary, permanent power
supply to the camera electronic.
Both green cables “Reverse IN” and “Reverse OUT” have to remain connected.

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2.8.3.2. Case 2: Interface does not receive the reverse gear signal
If the video interface does not receive +12V on the green wire of the 12pin interface cable
when reverse gear is engaged (not all vehicles are compatible), an external switching signal
from the reverse gear light is required. As the reverse gear light’s power supply isn’t voltage-
stable all the time, an ordinary open relay (e.g AC-RW-1230 with wiring AC-RS5) or filter (e.g.
AC-PNF-RVC) is required. The diagram below shows the connection type of the relay.
Disconnect the green cable’s pre-connected male- and female connectors of the
12pin cable and connect the green input cable “Reverse-IN” to the output connector
(87) of the relay.
Note: Not least to avoid short circuits, the best solution should be, to crimp a male
4mm connector to the relay’s output cable and connect it to the green cable’s female
4mm connector. The output-cable “Reverse-OUT” remains disconnected as it’s out of
function.
Connect the Reverse light’s power-cable to coil (85) and the vehicle’s ground to coil
(86) of the relay.
Connect the output connector (87) of the relay to the rear-view camera’s power-
cable, like you did it to the green “Reverse-IN” cable before.
Connect permanent power / 12V to the relay’s input connector (30).

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2.9. Connection –external keypad
Connect the keypad’s female 4pin connector to the 12pin interface cable’s male 4pin
connector.
Note: Even if the switching through several video sources by the keypad mightn’t be
required, the keypad’s invisible connection and availability is strongly recommended.

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3. Interface operation by external keypad
The interface’s external keypad can be used to switch the enabled inputs.
Long press of keypad (2-3 seconds)
By long pressing the external keypad (2-3 seconds), the video interfaces witches the input
from the factory video to the inserted video sources.
Each press (approx. 2 sec) will switch to the next enabled input. If all inputs are enabled the
order is:
Factory video  video IN1  video IN2  factory video  …
Disabled inputs will be skipped.
Note: The interface switches after releasing the switch (after long pressure).
Short press of keypad (only if DIP 1 is set to ON)
By short pressing the external keypad, the video interfaces switches from the factory video
to the front camera input and back to factory video.