^ That is definitely leaking at the front seal. My A6 did that forever and I finally got tired of recharging and watching the mess accumulate on the hood and everything in the plane of the clutch. I went with a polished Pro6ten compressor. (They have them in chrome too now.) They fit the original A6 brackets and you use factory style hose/manifold connection. I'm not familiar with a door in the A/C evaporator box. I know these earlier years have a very different system (electrically and mechanically) so I'm not much help there. Something causing the door to stick was my first thought.