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Old 07-02-2003, 09:16 PM
Ron Brooks Ron Brooks is offline
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Join Date: Jul 2002
Location: Stony Brook, NY
Posts: 160
Question What should high & low side pressure be for A/C?

Before I bought my 1988 300SE last year, the prior owner had the car converted to 134a. All the requisite parts were changed and the work was done by a reputable Mercedes shop. I saw receipts for thew work. I want to make sure the system is charged properly. I bought a nice set of gauges to check both the high and low side. Now my only problem is that I can't find any information as to what the pressure of my converted system should be with the car off and with the car running and A/C on. So, anyone know what the pressure should be so I can use my nifty new gauges?


Ron Brooks
Ron Brooks
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