So I've now had my 90TSI comfortline with driver assist for a couple of days. Driving it home the first day, I noticed this quiet noise coming from the front right...sounds a bit like a small pump or something of that nature. I then didn't hear it for a few days, but tonight I drove the car a little more vigorously (I've been babying it in the meantime) and heard it again. Seems to kick in somewhere between about 2.5 and 3.5k RPM but not all the time. Any ideas what it might be and if it's normal? It's not exactly an unpleasant noise (not loud or grinding or anything like that) but it's not something I was really expecting to hear either...