Audi breakdowns more than BMW, while BMW may have more problem with their electronic and faulty parts they can still be driven as long as you ignore the error message. But as for Audi you are more likely to be stranded on the road than a BMW or end up stuck in workshop for long time. Anyway no hard feeling i understand the need to be triggered since you owns an Audi, but take it from someone who own multiple marques my opinion isnt as biased as yours