It's a pretty good leak, will drain the reservoir quickly. You can see it dripping down under the car (took the belly pan off to see what was happening).

I had an A6 4.2, and the steering is so much better in the RS6 than in that other C5. I don't want to go about getting things put back together and have my RS6 feel like the A6 4.2

From what I've found for part numbers:
4D0145155K
4D0145155KXT - is remanufactured

Do these pumps have a tendency to crap the bed? I'm hoping is a line that sprung a leak and not the pump itself. Any thoughts or suggestions?