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Old 06-03-2002, 08:02 PM
Michael B
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a/c Pressure for '88 300e

Can someone provide the correct pressure reading for the high/low side a/c on an '88 300e.

I want to convert to R134...

Michael B
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Old 06-03-2002, 08:10 PM
Senior Member
Join Date: Apr 2001
Location: Baton Rouge
Posts: 485
Low side will be between 30-40. The higher it is less will cool , but if you dont put enough freon and it will pull in a vacuum on acceleration. Rule of thumb 15% less R-134A than what it holds in 12
euro 287
Mercedes Technician 7 Years (retired to Hyundai)
2000 Dodge Durango
98 Mazda truck
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