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LOCATION & REMOVAL 

Installation for MOSTAUX-BMW 

Insert OPTICAL leads into MOSTAUX-BMW loom and 
car loom to create loop, see diagram below 

To remove the (out) fibre optic cable from the factory 
connector you will need to remove the black outer    
casing and push out the blue locking insert. You will 
need to do the same to insert the cable into the supplied 
loom. (shown in previous fig) 

Other Connections 

Connect the RED cable to 12v+ PERM 

Connect the BLACK cable to 12v- GROUND 

Connect the BLUE cable to 12v+ to switch audio 

Connect the cable AUDIO sockets on the Harness to 
your audio source 

Important note 

The interface arrives pre-set for the BMW Business sys-
tem (Professional screen type shown opposite) 

To set the interface for the BMW Professional system 
you will need to download the software file from  

www.nav.tv 

With the file loaded you can change settings via the 
USB socket on the interface. 

INSTALLATION 

Installation is made at any position in the M.O.S.T    
optical ring, usually at the Radio / Navigation Mask Unit 
(shown below) or at the CD Changer located in the 
glove box. 

 

 

INTERFACE

            

CAR CONNECTOR

    OUT cable from screen 

IN cable from interface 

OPERATING INSTRUCTIONS 

Your added audio source can now be selected by 

supplying 12v+ to the blue cable. Possibly using a 

remote out from the added source, or external 

switch. 

When activated the added audio will switch to     

override the factory audio. Selecting another source 

i.e. radio from the head unit, or removing the 12V+ 

from the blue cable will return to factory audio.  

If you have de-activated the added audio source by 

selecting a factory source you must then, to           

re-activate the added audio source supply a 12v+ to 

the Blue cable, this may mean the external switch (if 

used) will have to be tuned off then on to activate.  

It is not recommended to leave the 12v+ supply on 

the Blue cable when the car is switched off. As it will 

be active as the car starts and can give the          

appearance of no audio if the added source is not 

playing. 

Note; 

If you are using this interface with the NAVTV        

NAV-INBMW3 then you may wish to connect the BLUE 

cable of the MOSTAUX-BMW to the WHITE cable in 

the POWER harness of the NAV-INBMW3.                

Please note that the 12v output (WHITE Cable) of the 

NAV-INBMW3 is 12v– Ground and will require a relay 

to convert this to a suitable 12v+ to activate the  MO-

STAUX-BMW.  

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