Recently had an audio company install the rns 510 sat nav into my edition 30 however it isnt interacting with
the highline computer. Shouldnt the highline computer show directions on it?
can anybody tell me whether this requires vagcom?
Also i had the front speakers upgraded which sound great however i think they may be wired wrong because the front
speakers now only work when the ignition is on. Whereas the rear speakers continue working until the key is removed.
Im a noob when it comes to audio so before i complain to the company that installed it, could anyone shed any light on
why this is happening?

Thanks