Hi fellow audi owners. Iv owned a few audI's, mostly A4's and never had much trouble with them but bought a 2002 A6 a coupla months ago and right from the start things have been failing. First the lambda sensors, front & back went, replaced them, then the troblesome ignition coils, replaced them then the coolant flange that holds the coolant temp sensor failed so replaced that, which triggered the coolant. warning light