The errors are still on and left low beam seems to be the only light really acting up. it starts fine, calibrates fine, then shuts down couple of times and after that its fine.That's common. Went sking yesterday and during the cold start the Audi gave me a "Brake light" error message altough the lights were fine. See here.
Anyway, -20 Celsius! Holy cow!
It doesnt have a webasto.. Only reason for it was that I was fed up with batteries via past experienses and I just said "gimme best you have" which resulted the most expensive battery ever bought by me...Does it have a Webasto or is there some other reason you went for AGM? Just curious.