[s-cars] coolant loss

[Twobro12 at aol.com]

After draining the system how do you fill it back up?  I went to do the 
t-stat replacement over the weekend as as advised by many listers but realized that 
there was no radiator cap on the s-car and my friend was unsure of how to 
fill it and burp the system once finished.  do we re-fill from the expansion 
reservoir and leave the cap open until the t-stat opens?  also, the vw/audi green 
coolant is the right stuff, correct?  mike