Mercedes-Benz Forum - View Single Post - E320 4matic wagon - no air
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post #2 of Old 08-07-2019, 02:07 PM
Join Date: Dec 2016
Vehicle: 1999 ML430, 2000 ML320, 2005 E500 4matic wagon
Location: Wisconsin
Posts: 142
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The system monitors several things. You said it is not low on freon.

What are the pressure readings on the low side and high side ports. Too much pressure and it will shut down to protect itself.

Have you had the car scanned with a scan tool that can read the AC codes?
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