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Hi, where is the low side A/C charging port?

(1990 Mercedes-Benz 300SL)
in Antelope, CA on August 23, 2012
A/C is not cold.
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Displaying 2 answers & 1 comment
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on August 23, 2012
Follow large pipe/hose that goes into car low side port is LARGER than HI side.
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of Greg's Orange Auto on August 23, 2012
is this r12 or r134 system?
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on August 23, 2012
R12 system.
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