Welcome to the Aero World.
My 2014 Plus 8 is an S4 Aero with a diminished body, mechanically it is the same.
Another vote for the Wolf sump rubbing plate. Mine is marked, the lowest point on the sump is the oil filter housing, this is plastic. If broken the oil pump dumps all the oil on the ground in less than 60 seconds...
On my car the fuel gauge works well, it is really accurate down to 15% and the warning light comes on at 5%, but ONLY ON LEVEL GROUND: I've no idea why my gauge should work when so many are virtually random number generators.
The best modification, in my view, that can be made to any S4 Aero is SSL replacement springs and shocks. The result is an improved ride and better grip.
