where is the maintenance port for the a/c recharge? on 1990 Audi 100

I looked online but couldn't find a simple illustration of the engine with lined labels or something similar.

by in San Lorenzo, CA on November 17, 2012
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2 answers 2 comments
ANSWER by , November 17, 2012
One is on the low pressure side line the other is on the high pressure side line. Check by condensor, might be hidden by grille.
COMMENT by , November 18, 2012
Ok, thanks ziptie12. Ill take another look.
ANSWER by , November 17, 2012
follow the a/c lines, you should find a schrader type valve or a quick disconnect valve...
COMMENT by , November 18, 2012
Thanks. I'll check it out again tomorrow.