1. What is the quickest way to recharge the r-134a in my system on a 1998 c230 ?

2. Where is the entry port for the refrigerant in the engine compartment ? I believe it is on the lower right hand side if you are facing the engine compartment. Looks like it would only accept a male screw in hose/adaptor.

3. Any special parts needed ?

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1998 C230
1994 Infiniti J30T
1984 BMW 318i
1987 VW Golf GT
1975 Buick LeSabre Conv.