First, I have an s5. The rad has two nipples on either side on the bottom. I dont remember taking anything off of them, I know its for auto tranny cooling, but mines a 5 spped. Do they block them up from the factory or what? Also, theres supposed to be some sort of swith (if your under the car feet out, bottom left hand corner) mine doesnt have one. Second, I removed the rats nest....looking at the lower intake mani, left hand side top, there is what looks to be an oil line..rtv and a cap/clamp be enough? Third, Passenger side engine harness, right before the rats nest clips, is there a ground? I have an extra clip, but the only other extra clip I have is a ground. Fourth, Pressure sensor, where do I put the vaccum to now? All help will help. Thanks guys

 

That switch you're talking about, it may be for a the flip ups. I remember being able to get to them from under the car. Then again, mine was an S4..

 

As for the Passenger side harness, is your car manual or power window/mirrors? It may be what it's for. 60% sure it's one of the 2.

 

Sorry, I should have been more clear. Its some kind of switch in the rad. per haynes. I have an s4 rad and it has one.