NavLinkz RL4-MBN4 User manual

Version 15.02.2023 HW CAM (V100) / (EF2L145/V20) RL4-MBN4
Video-inserter
RL4-MBN4
Compatible with
Mercedes Benz vehicles
with Comand APS HD NTG3, Comand APS NTG4,
Audio20 NTG4 and Audio50 APS NTG4 infotainment
with 10pin LVDS connector at the monitor
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 Video sources (e.g. USB-Player, DVB-T 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 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. Dip-switch settings
1.4.1. Settigs of 8 dip –black
1.4.1.1. Activating the front camera input (dip 1)
1.4.1.2. Enabling the interface’s video inputs (dip 2-3)
1.4.1.3. Rear-view camera setting (dip 5)
1.4.1.4. Monitor selection (dip7-8)
1.4.2. Settigs of 4 dip - red
2. Installation
2.1. Place of connection
2.2. Connection scheme
2.3. Connection –LVDS switchable
2.4. Connection –10pin power/CAN cable
2.4.1. Special case –Vehicles with Comand APS NTG3 (e.g. W221 S-Klasse)
2.5. Analogue power supply
2.6. Power supply output
2.7. Connection –video sources
2.7.1. Audio insertion
2.7.2. After-market frontcamera
2.7.3. After-market rear-view camera
2.7.3.1. Case 1: Interface receives the reverse gear signal
2.7.3.2. Case 2: Interface does not receive the reverse gear signal
2.8. Connection –external keypad
3. Interface operation by external keypad
3.1. By Comand buttons
3.2. By external keypad
4. Picture settings
5. Specifications
6. Frequently asked questions
7. Technical support

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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
C-class (W204) from 03/2007 till 02/2011,
CL-class (C216) from 01/2006 till 05/2009,
CLC-class (CL203) from 09/2008,
E-class (W212) from 04/2009 till 05/2011,
E-class Coupe (W207) from 05/2009 till 05/2011,
CLS-Coupe (C218) from 01/2011 till 05/2011,
GLK-class (X204) from 09/2008,
S-class (W221) from 10/2005 till 05/2009,
SLS (C197) from 03/2010
Comand APS HD NTG3
Comand APS NTG4,
Audio20 NTG4,
Audio50 APS NTG4
with 10pin LVDS connector on the
monitor
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.
Video input signal NTSC video sources compatible only.
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. Dip-switch settings
1.4.1. Settings of 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!
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
Monitor
adjustment
Refer to chapter 1.4.1.4. (Monitor adjustment)
8

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1.4.1.1. 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”.
1.4.1.2. Enabling the interface’s video inputs (dip 2 and 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.
1.4.1.3. 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.
1.4.1.4. Monitor adjustment (dip 7 and 8)
Dip 7 and 8 are for monitor-specific video settings which cannot be predicted as even within
the same head-unit version, the monitor specifications may vary.
In the event of a poor quality image with the following settings, also try the dip switch
setting of the 4th (additional option).
Fahrzeug/Navigation
Dip 7
Dip 8
7inch 800x480 display
OFF
OFF
5.8inch 480x240 Display
OFF
ON
5inch 280x100 Display
ON
OFF
Additional option
ON
ON
Note: Dip 4 and 6 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!
1.4.2. Settings of 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
To install the interface, first switch off the ignition and disconnect the vehicle’s battery.
Please read the owner`s manual of the car, regarding the battery`s disconnection! If
required, enable the car`s Sleep-mode (hibernation mode)
In case the sleep-mode does not succeed, the disconnection of the battery can be done
with a resistor lead.
As with any installation of retrofit equipment, a stand-by test is neccessary after the
installation of the video interface, to ensure that the unit also switches off after reaching
the vehicle‘s sleep mode.
Before the final installation, we recommend a test-run of the interface. Due to changes in
the production of the vehicle manufacturer, there’s always the possibility of
incompatibility.
2.1. Place of connection
The video interface has to be connected on the rear-side of the vehicle’s monitor (picture
signal) and on the rear-side of the vehicle’s head-unit (Power and CAN at the Quadlock).

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2.2. Connection scheme

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2.3. Connection –LVDS switch
Connect the female 10pin connector “To interface” of the LVDS switch to the video
interface’s male 10pin connector.
Connect the female 10pin connector of the factory harness to the male 10pin
connector “Monitor Cable In” of the LVDS switch (Pay attention to correct pin
arrangement).
Attention: The angle position of the factory female 10pin LVDS connector’s cable
may vary and moreover the connection isn’t non-interchangeable!
Pay attention to a correct connection of the 10 pins inside!
Connect the female 10pin LVDS connector to the previously become free 10pin LVDS
connector of the factory monitor

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2.4. Connection –10pin Power / CAN cable
Power and CAN must be connected to the quadlock on the back of the head unit!
No liability for vehicle wire colors and pin definition!
Possible changes by the vehicle manufacturer. The given
information must be verified by the installer.
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.
Cable colour
Assignment
●●Red/Blue
+12Volt Permanent 15
●Brown
Ground Pin 12
●●Brown/Red
CAN HIGH Pin 11
●Brown
CAN LOW Pin 9

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2.4.1. Special case –Vehicles with Comand APS NTG3 connection (e.g. W221 S-Klasse)
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“ to the vehicle’s CAN low wire at pin11 of the
female 20pin connector (see digram and assignment table) and isolate the connection.
Connect the single blue wire „CAN HIGH“ to the vehicle’s CAN high wire at pin1 of the
female 20pin connector (see digram and assignment table) 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.
No liability for vehicle wire colors and pin definition! Changes by the vehicle manufacturer
are possible. The given information must be verified by the installer.
Cable colour
Assignment
●Yellow
CAN-LOW Pin 11
●●Yellow/White
CAN-HIGH Pin 1

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2.5. 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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2.6. 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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2.7. 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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2.7.1. 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.
2.7.2. 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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2.7.3. 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.
2.7.3.1. 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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2.7.3.2. 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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2.8. 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
3.1. By Comand buttons
The knob of the Comand can be used to execute interface functions.
Long pull back (3 sec.) knob in centre console to switch the video source.
Each repetition will switch to the next enabled input. If all inputs are
enabled the order is:
Factory video  video IN1  video IN2  factory video  …
Inputs which are not enabled are skipped. If the audio cable is connected, when switching
from video IN1 to video IN2, also the sound will be switched.
Disabled inputs will be skipped.
Note: Switching by the knob of the Comand does not work in all vehicles!
3.2. By external keypad
The interface’s external keypad can alternatively 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.

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4. Picture settings
The picture settings are adjustable by the 3 push-buttons of the daughjter PCB’s menu
keypad. Press the 1. button to open the OSD settings menu or to switch to the next menu
item. By pressing the other both push buttons the selected value will be changed. To avoid
accidental changes during or after the installation, we recommend to disconnect the keypad
from the pushbutton cable after the adjustments are done. Adjustments have to be done,
while the selected input is visible on the monitor.
Note: The OSD menu is only shown when a working video source is connected to the
selected video-input of the interface.
The following settings are available:
Contrast
Brightness
Saturation
Position H = horizontal picture position)
Position V = vertical picture position)
Guide-Pos = no function
H-SIZE = horizontal picture size
V-SIZE = vertical picture size
Note: To adjust the reverse picture settings, engage the reverse gear.
5. Specifications
BATT/ACC range 7V - 25V
Stand-by power drain 6mA
Power 170mA @12V
Video input 0.7V - 1V
Video input formats NTSC
Temperature range -40°C to +85°C
Dimensions Video-box 117 x 26 x 90mm (W x H x D)
Dimensions Video switch 125 x 20 x 35mm (W x H x D)