Two of my friends own Golfs, both used VW vin checker via the website to see if they were effected, both came back all clear, 3 days later they received letters for recall, even the website don't tell the truth lol
I had this with my after market unit, mine wasnt an Alpine, unit turned out to be faulty and was replaced, solved the problem, I didnt notice the issue straight away due to not leaving the car stood long, it took a few days stood for mine to struggle to start, very low drain from the head unit
Ah ok, I had a Concert II in mine till I changed it for after market, mine is also bose, as you say its only on bumps and rough road its pointing towards a lose connection, trying to find it will be a pain, I am no expert but i would try the path of elimination, disconnect certain things to see...
I guess I wont be going to many meets if our cars have to be up to scratch lol, I like my car but it is not my pride and joy so therefore it is not an up to scratch example, I may feel intimidated by the gleeming examples others may bring to meets :audibash:
Oh dear, another victim for the Dark side :keule: welcome to the forum mate, yes we will gladly spend your money for you here, I have a bluefin map on mine which is fairly aggressive which does put a smile on my face, it never bores me lol