Axxess AX-AM-MB91 User manual

CAUTION! All accessories, switches, climate
controls panels, and especially air bag indicator
lights must be connected before cycling the
ignition. Also, do not remove the factory radio
with the key in the on position, or while the
vehicle is running.
AX-AM-MB91
INSTALLATION INSTRUCTIONS
AxxessInterfaces.com © COPYRIGHT 2018 METRA ELECTRONICS CORPORATION REV. 6/30/18 INSTAX-AM-MB91
INTERFACE FEATURES
INTERFACE COMPONENTS
TOOLS REQUIRED
• Wire cutter • Crimp tool • Solder gun • Tape
• Connectors (example: butt-connectors, bell
caps, etc.)
TABLE OF CONTENTS
Connections to be made .......................................2
Configuring the AX-AM-MB91................................3
Installing the AX-AM-MB91 ....................................4
User guide ..............................................................5
Mercedes Benz (NTG 4.5 with 5.8” & 7” display)
HDMI and Camera Interface 2011-up*
APPLICATIONS
• Provides front and rear camera inputs to the factory display screen
• Provides an HDMI input to the factory display screen
• Micro “B” USB updatable
MERCEDES
A Class (W176) 2012-up
GLA Class (X156) 2014-up
CLA Class (C117) 2014-up
B Class (W246) 2012-up
C Class (W204) 2011-2014
E Class (W212) 2012-2016
ML/GL Class (W166/X166) 2011-up
• AX-AM-MB91 interface
• AX-AM-MB91 harness
• 6-pin to 4-pin LVDS (video) cable
• LVDS extension cable
• 10-pin harness with RCA jacks
• 3.5mm extension cable
*Visit AxxessInterfaces.com for up-to-date vehicle specific applications.

2
CONNECTIONS TO BE MADE
FRONT CAM IN
REAR CAM IN
ACC PWR OUT
REAR CAM PWR
FRONT CAM PWR
CAM GROUND
HDMILVDS OUT LVDS IN AV IN
POWER
IN
(Connections Diagram)
• If installing a front/rear camera, connect the Black wire labeled “GND”,
to the camera(s) ground wire.
• If installing a backup camera, connect the Red wire labeled “Reverse Camera 12v”,
to the backup camera power wire.
• If installing a front camera, connect the Red wire labeled “Front Camera 12v”,
to the front camera power wire.
• The Red wire labeled “Acc Power Output” is optional if a power source is required
while a camera is active.
• If installing a backup camera, connect the RCA jack labeled “Reverse Camera Video Input”
to the camera.
• If installing a front camera, connect the RCA jack labeled “Front Camera Video Input”
to the camera.
• If adding an HDMI input to the factory display screen, connect an HDMI cable (Axxess part
number AX-HDCABLE, sold separately), to the port on the AX-AM-MB91 labeled “HDMI IN”.

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REV. 6/30/2018 INSTAX-AM-MB91
Dip switch settings
Remove the access door located on the top of the AX-AM-MB91 interface to access the dip switches.
Dip 1
If the vehicle is equipped with a factory
backup camera: On: Yes Off: No
Dip 3
If the vehicle has an aftermarket
backup camera : On: Yes Off: No
Dips 4 & 5
• 5.8-inch screen:
Dip 4 On - Dip 5 Off
• 6.5-inch screen:
Dip 4 Off - Dip 5 Off
Dip 2
If the vehicle has an aftermarket front
camera: On: Yes Off: No
CONFIGURING THE AX-AM-MB91
1 2 3 4 5
ON DIP
1 2 3 4 5
ON DIP
1 2 3 4 5
ON DIP
1 2 3 4 5
ON DIP

4
INSTALLING THE AX-AM-MB91
• Remove the main connector from the radio, then connect the male plug from the
AX-AM-MB91 harness into the radio.
• Connect the factory male factory connector into the female plug from the AX-AM-MB91 harness .
• Connect the AX-AM-MB91 harness into the AX-AM-MB91 interface.
• If adding an HDMI input to the factory display screen, connect the 3.5mm extension cable to
the AX-AM-MB91 harness , and then to the vehicles 3.5mm AUX-IN jack.
• Remove the Gray LVDS (video) cable from the radio, then connect it to the AX-AM-MB91
interface (LVDS OUT). (Figure A)
Note: An LVDS extension cable is provided if more length is required.
• Connect the 6-pin to 4-pin LVDS (video) cable into the radio, and then into the AX-AM-MB91
interface (LVDS IN).
• Connect the 10-pin harness with RCA jacks into the AX-AM-MB91 interface.
(Figure A – Picture shown for illustration only, actual radio may differ )

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Button Configuration
• The buttons in the center console will be used to operate the AX-AM-MB91.
USER GUIDE
HDMI access
• Select AUX-IN as a source from the factory radio.
• Press and & “Button 1” for 2 secs to switch between the factory screen & the AX-AM-MB91 screen.
• Double tap “Button 1” to exit HDMI mode.
• Double tap “Button 1” to disable the video-in-motion warning message.
Front camera access
• Ensure dip switch 2 is selected to “ON”.
• Double tap “Button 1” to activate the front camera.
• Double tap “Button 1” to exit front camera mode.
Rear camera access
• The backup camera will automatically activate while the vehicle is in reverse gear.
• Deselecting the reverse gear will activate the front camera, if installed and dip switch 2 is
selected to “ON”.
Note: This camera takes priority over HDMI mode, and front camera mode, but will not deactivate the
front camera. Double tap “Button 1”, or drive over 10 mph, to cancel front camera mode
.
View Version Number
• Press and hold “Button 1” for 8 seconds to enter the firmware information screen.

6

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REV. 6/30/2018 INSTAX-AM-MB91

KNOWLEDGE IS POWER
Enhance your installation and fabrication skills by
enrolling in the most recognized and respected
mobile electronics school in our industry.
Log onto www.installerinstitute.com or call
800-354-6782 for more information and take steps
toward a better tomorrow.
®
Metra recommends MECP
certified technicians
IMPORTANT
If you are having difficulties with the installation of this product,
please call our Tech Support line at 1-800-253-TECH. Before doing
so, look over the instructions a second time, and make sure the
installation was performed exactly as the instructions are stated.
Please have the vehicle apart and ready to perform troubleshooting
steps before calling.
AxxessInterfaces.com © COPYRIGHT 2018 METRA ELECTRONICS CORPORATION REV. 6/30/18 INSTAX-AM-MB91
INSTALLATION INSTRUCTIONS
AX-AM-MB91