Hey ladies and gents, new to the forum and audis as well. Picked up a 2012 S5 with the 4.2l been great but sprung a coolant leak at the rear of the engine dripping really bad on passenger side above drive shaft. Possibly central cause leak seems to be coming out both sides but more passenger. With car off and blowing into the coolant reservoir it will leak like a side. Just can't find the leak from the top of the engine at all. Anyone able to pin point a better place to search. I have the inner passenger fender liner off and the air box and can't find it at all.