CRUX VRFMB-78N Front Rear View Integration Interface Mercedes Benz Instruction Manual

June 17, 2024
CRUX

VRFMB-78N
Front and Rear-View Integration Interface for Mercedes Benz
with COMAND Online NTG5/5.1 and Audio20 NTG5/5.1 Systems

Vehicle Applications

MERCEDES BENZ
2015 – 2016 A-class (W176)
2015 – 2016 B-class (W24)
2015 – 2017 C-class (W205)
2015 – 2016 E-class (W212)
2015 – 2016 CLA (C117)
2015 – 2016 CLS (W218)
2015 – 2016 GLA (X156)
2015 – 2016 GLC (X205)

Product Features

  • Rear-view camera input with Dynamic Guide Lines
  • Control by factory infotainment
  • On-screen display and setup
  • 2 trigger outputs (+12V max. 1A), separately adjustable switching events (CAN, ACC, rear-view camera, reverse gear)
  • Front camera input
  • Front camera input can also be used as an Auxiliary Video Input (Crux part# AUX-MB2, OBD2 Audio Aux coding, may be required to create an Auxiliary Audio Input) (Sold separately).
  • Automatic switching to rear-view camera input on engagement of reverse gear from all operation modes
  • Forced rear-view camera option
  • Manual return from rear-view and front camera (cancellation of automatic switching)
  • Compatible with all factory video accessories (e.g. rear-view camera, DVD-changer, etc.)
  • Plug & Play installation
  • COMAND Online NTG5/5.1, Audio20 NTG5/5.1 with 4pin HSD LVDS connector on the monitor

Parts Included

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Parts
Included

Wring Diagram

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Wiring
Diagram 1

Installation Instructions

Setting the DIP switches of the Interface Box.
DIP 1 on the back of the interface box is used to set the monitor type. DIP 2 and 3 must be set to OFF.

Device| DIP 1|
---|---|---
COMAND Online NTG5/5.1| ON| 7 inch Display
Audio20 NTG5/5.1| OFF| 6 inch Display

After each change of the DIP switch settings you have to execute a power reset of the interface box!

Connecting Interface box and harnesses
CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz -
Wiring Diagram 2

  1. Remove the female Quadlock connector of the vehicle harness from the rear of the headunit.
  2. Remove optical leads from the female Quadlock connector of the vehicle harness and insert them into the female Quadlock connector of MB-78N harness at the same position.
  3. Connect the female Quadlock connector of vehicle harness to the male Quadlock connector of MB-78N harness.
  4. Connect the female Quadlock connector of MB-78N harness to the male Quadlock connector of the navigation computer.
  5. Connect the female 8 pin molex connector of the MB-78N harness to the male 8 pin molex connector of the Power/CAN harness.
  6. Connect the female 12pin AMP connector of the Power/CAN harness to the front side of the VRFMB78N interface box.

LEDs of the Interface box

LVDS Connection

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Wiring
Diagram 4

  1. Connect the female 4pin HSD LVDS connector of the LVDS cable to the male 4pin HSD LVDS connector (LVDS-IN) on the rear of the VRFMB-78N interface box.
  2. Remove the Blue female 4pin HSD LVDS connector of the vehicle harness at the back of the head unit and connect it to the male 4pin HSD LVDS of the LVDS cable.
  3. Connect the female 4pin HSD LVDS connector of the LVDS cable to the male 4pin HSD LVDS connector (LVDS-OUT) on the rear of the VRFMB-78N interface box.
  4. Connect the female 4pin HSD LVDS connector of the LVDS cable to the Pink male 4pin HSD LVDS connector on the rear of the head unit.

Connection to the aftermarket front camera

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Wiring
Diagram 5

  1. Connect the video RCA of the after-market front camera to the female RCA connector “FRONT CAM” of the interface box.
  2. The Pink wire of the Power/CAN harness can be used for +12V electric power supply (max. 1A) of the aftermarket front camera. Configure in the OSD-menu “MISC”, Menu item “POWER OUT 1” the designated electric power supply (see chapter “Configurable switching outputs”).

Settings for connecting an aftermarket front camera
You have to configure some settings in the OSD-menu’s INPUTS and MISC if you want to connect an aftermarket front camera (Operation of the OSD: see chapter “OSD-Operation”).

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Wiring
Diagram 7

OSD Menu Menu item Setting Description
INPUT FVC OFF No front camera connected
ON Switches to front camera if parking process is enabled and reverse gear is

released
OPTION| PARK LOGIC| RGearOnly| Enabled while parking process
RGearSpeed| Enabled while parking process and up to 18 mph
RGearTime| Enabled while parking process and up to 20 seconds

Note: You can deactivate the enabled parking process by pressing the “Hands-free Mode OFF” or “Right Arrow” button on the steering wheel controls. After deactivation you cannot enable the parking process again until the vehicle is driving faster than 18 mph or the ignition is switched off.
Connection to the aftermarket rear view camera

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Wiring
Diagram 8

  1. Connect the video RCA of the after-market rear view camera to the female RCA connector “REAR CAM” of the interface box.
  2. The Green wire of harness Power/CAN harness can be used for +12V power supply (max. 1A) of the after-market rear view camera. Configure in the OSD-menu “MISC”, menu  item “POWER OUT 2” the designated power supply (see chapter “Configurable switching outputs”).

Settings for connecting an aftermarket rear view camera
You have to configure some settings in the OSD-menus INPUTS and MISC if you want to connect an aftermarket rear view camera (Operation of the OSD: see chapter “OSD-Operation”).

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Wiring
Diagram 10

OSD Menu Menu item Setting Explication
INPUT RVC OFF No rear-view camera connected
ON Switches to rear view camera if reverse gear is engaged and/or PDC display

is displayed
OEM| If a factory rear view camera is present.
The interface turns off, if reverse gear is enabled and it displays factory rear view camera
OPTION| PARK LOGIC| RGearOnly| Enabled while parking process
RGearSpeed| Enabled while parking process and up to 18 mph
RGearTime| Enabled while parking process and up to 20 seconds
RVC LINES| OFF| Dynamic guide lines deactivated
ON| Dynamic guide lines activated

Note: You can deactivate the enabled parking process by pressing the “Hands-free mode OFF” or “Right Arrow” button on the steering wheel. After deactivation you cannot enable the parking process again until the vehicle is driving faster than 18 mph or the ignition is switched off.

Configurable Trigger Outputs
CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz -
Wiring Diagram 11

  1. You can configure both +12V trigger outputs separately. The Pink wire is POWER OUT 1 and the Green wire is POWER OUT 2.

Note: You can configure the both trigger outputs in the OSD-Menu MISC separately (Operation of the OSD: see chapter “OSD-Operation”).

OSD Menu Menu item Setting Description
OPTION POWER OUT1 (Pink)

POWER OUT2
(Green)| CAN| +12V when the interface is on (Red LED on)
ACC| +12V when ignition is on
CAM| If a factory rear view camera is present.
The interface turns off, if reverse gear is enabled and it displays factory rear view camera
RGEAR| +12V when reverse gear is engaged
AVS| +12V when interface video-source is active
OFF| Trigger output deactivated

Dynamic Guide Lines
You have to configure some settings in the OSD menu OPTION if you want to activate the Dynamic Guidelines (Operation of the OSD: see chapter “OSD- Operation”).

OSD Menu Menu item Setting Description
OPTION RVC LINES OFF Dynamic Guide Lines deactivated
ON Dynamic Guide Lines activated
CAR TYPE A/B/C/CLA/CLS/E/GLA/GLC Vehicle type selection

Picture settings
You can change the picture settings in the OSD Menu IMAGE (activation only from interface AV level possible).

◦ Brightness
◦ Contrast
◦ Saturation
◦ Hue
◦ Sharpness
Note: The picture settings will be retained for each AV-source separately.

Operation
OSD – On-Screen Display
You can change the basic configurations of the interface in the OSD (on screen display).

OSD – Operation
You can control the OSD by steering wheel buttons.
Set the instrument cluster screen to “NAVI” before you start the OSD control.

Mercedes Steering Wheel Controls version 1

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Wiring
Diagram 18

Mercedes Steering Wheel Controls version 2

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Wiring
Diagram 19

OSD – Additional setting options
The following settings in the OSD menus OPTION and OSD can be configured over and above the described settings in this manual (Operation of the OSD: see chapter “OSD-Operation”):

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Wiring
Diagram 20

OSD Menu Menu item Setting Description
OSD POS. X 0-xxx Horizontal position of the OSD
POS. Y 0-xxx Vertical position of the OSD
SIZE SMALL Small OSD menu windows
LARGE Large OSD menu windows
OSD TIMEOUT Feb-20 Time setting for automatic OSD shutoff
INFO VERSION X.XX.XX Displays the current SW version
OPTION FACTORY RESET Resetting to factory settings

Video-In-Motion function
It is possible to activate and deactivate the video-in-motion in the OSD menu “OPTION” (Operation of the OSD: see chapter “OSD-Operation”).

OSD Menu Menu item Setting Description
OPTION VIM ON Video-in-motion activated
OFF Video-in-motion deactivated

The Video-In-Motion function is permanently active without disturbing the navigation performance.
Selecting the interface as current video source

CRUX VRFMB 78N Front Rear View Integration Interface Mercedes Benz - Wiring
Diagram 22

A Long press of the “Hands-free Mode OFF” OR a Long press “Right Arrow” button will choose the interface as current video source.
A Short press of the “Hang-Up” button will switch the video sources (cameras). Each short press will switch to the next enabled input. If all inputs are enabled the order is:
FRONT CAM → REAR CAM → …
Inputs which are not enabled are skipped.

Crux Interfacing Solutions
www.cruxinterfacing.com|

http://cruxinterfacing.com/

| tel. #: 818-609-9299
fax #: 818-996-8188
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