AC Re-Charge for '96 A4

I recently bought an A4 Quattro that will need some work on the AC. Will eventually want to fill the Freon myself-----where the heck is the low pressure fitting??

i googled this for you...

first 2 answers says there's only a high side port...

http://www.audiforums.com/forum/showthread.php?t=106379

http://wiki.answers.com/Q/How_can_you_recharge_the_Ac_in_a_1996_audi_a4_quat tro

then, there's one guy that says you can remove a switch on the LOW SIDE to access the port

but, it looks like a tight fit for the R134A coupling to go into that port; i don't think the aftermarket kits would be able to fit into that schrader valve

http://forums.audiworld.com/showthread.php?t=222595

looks like you're stuck going to a professional for this