That's the right connector. There aren't any other wires right by the AC high-pressure fitting.

The motor is on the left, and the right side is a pully-driven idler, so you only need to replace the motor and left blade. Phil (Buy Parts, above) has it for $205, if it's the same as the one in my car, and the installation is pretty easy. Get a new belt while you're ordering. He has an aftermarket dual-motor fan assembly which is probably better than the piece of junk I bought on Ebay, but it does cost more than the OEM motor.

OEM Motor:
http://catalog.eautopartscatalog.com/mercedesshop/sophio/quote.jsp?clientid=catalog.mercedesshop&cookieid=1V816REW81VE0MO2A2&baseurl=http://catalog.peachparts.com/&partner=mercedesshop&year=1997&product=G5000-70034&application=000256294
Belt:
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1V816REW81VE0MO2A2&year=1997&make=MB&model=E-320-002&category=W&part=Fan+Drive+Belt