A thought just occurred to me (ouch!) that locking the wheel to one side (I believe it was the left) made for a growling noise since I got the car... my solution?... not to lock the steering in that direction. Is it worth flushing the system while I'm at it or just make sure it's full and forget it? I'll try the self purge method first.

Bummer that germanfilters.com sold me a filter for the beast when I ordered one of everything. Guess they also are unaware that there's not filter for this car!!!