where is the freon Charging point for the A/C system? on 1991 Mercedes-Benz 560SEC

Hot air is blowing suddenly I wish to charge the coolant gas but I am not able to pin point the inlet point

by in Fresno, CA on July 30, 2010
1 answer
ANSWER by on January 25, 2011
The low side service port is located to the left of the left cylinder head on the A/C line above the front spark plug.

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