[s-cars] Coolant Testing?

[northrup]

I have a coolant system test kit.  It works well for the Japanese and 
American cars I've run into.   But when i pop the hood on my '00Audi S4, I 
am unsure of the best way to proceed.   

I have the Bentley manual on CD - which means it's on a computer elsewhere, 
and not this one here.   I'll have a look at that when I can, but in the 
mean time I'm looking for the best practice by fellow S car owners.

Am i to pressurize from the reservoir?  If so, i guess i'll need an 
adapter for my kit. 

TIA
wilson '00S4