Just came back from my 21-day European vacation, and the RS6 started up right away.
Unfortunately there were 3 oil leaks identified, and needed immediate attention.

First of them was the brake line oil leak. This is occurring on both driver and passenger side.
I thought it might have been oil left over on the stock suspension lines which were left in place and capped. But after closer inspection, it is the brake lines.

I had ordered in the past stainless steel brake lines, which were to be put on during the change of the rotors and pads, but the mechanic felt it was unnecessary due to the good condition of the stock (still from factory) lines. That was about 1 year ago.

Car going in for service.