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Just installed RNS-E in 2002 A6 (Symp II with Bose & Phatnoise) One quick question. I did not run the wire from RNS-E to the GALA. Unit seems to be working fine without it. I don't need the display in my (red) DIS. WIll not connecting the wire have any impact on operation?
 

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That wire sends the vehicle speed to the nav system, which it uses for dead reckoning when it's not receiving a signal from the satellite network.

So as long as you have a connection to the satellites the nav will work OK, but it will update your position only sporadically (I've heard as infrequently as once per minute). If you go into a tunnel or a major city and lose line of sight to the satellites, your nav system will stop updating your position.

The connection has nothing to do with displaying nav info on your DIS, that happens over the CAN bus.
 
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