Hi there! It's Whitton Car Audio, the guy is very good.@ElliotViola Would you mind saying which audio specialist you're dealing with, the prices you've been quoted for installing the C5s seem very good!
I've just had my JL C3 6.5in tweeters and front speaker upgrade done, £460 total for front inc. labour.
The difference is INSANE, I honestly don't think I'm going to need rear speakers now the front is so crisp.
He also checked the rear audio channel on the stock unit - dead as a dodo. Clearly needs turning on via infotainment, though VW don't seem to think so.
I have a contact at a VW dealership who found a 3rd party company that know how to sort it out in the infotainment system to enable it, I think they quoted about £490+VAT to install and activate the rear speakers?