Mercedes-Benz Forum - View Single Post - E320 4matic wagon - no air
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post #4 of Old 08-08-2019, 11:45 AM
Join Date: Dec 2016
Vehicle: 1999 ML430, 2000 ML320, 2005 E500 4matic wagon
Location: Wisconsin
Posts: 142
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Many of the big box parts stores loan the AC gauge set that you would connect to the low side and high side port.

The values can change based on ambient temp. The correct values are easily found on interweb as they are the same for almost all cars.

AC Pressure Chart | R-134a Temperature Pressure Chart
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