Audi A4 B6 Common Problems Updated -

Water drains from the sunroof via tubes that run down the A-pillars and C-pillars.

If you’re looking at a B6 as a project or daily, the is the most reliable combo. The 3.0 V6 sounds great but timing chain repairs can total the car. Avoid the Multitronic CVT completely. audi a4 b6 common problems