Coolant filler neck height
 

Hey guys I am changing my radiator and I am wanting to know does the radiator cap have to be the highest point on the car? Or if its not do you just have to get the air out of the system??? Like if I jacked the front of the car up with the lower radiator cap lower than engine will that bleed the system??

S4 or S5?

It is a s4 but I have fitted a Honda civic radiator as its a drag car on methanol.

fill it through the radiator cap on the radiator with the cap on the water neck off. Should drive all the air out.

a little burping by squeezing the upper hose and a little more filling and you should be good.