stick to the meguiars for that sexy audi mate. i'm a valeter i've used autoglym products for years, now i'm embarassed to admit it since discovering maguiars a couple of years ago, never turned back. i still try everything that auto glym brings out as i still use them for rubber dressing and sundries. that stuff will streak like hell.
get some maguiars polish, perhaps the next gen stuff(not massively familiar with non trade stuff), then finish off with gold class wax. you'll love it. disgraceful.