Thread: Location of low pressure valve - 99 ML320?
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Old 07-23-2008, 10:20 AM
Gene Horr Gene Horr is offline
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Join Date: Jun 2008
Posts: 343
In the 430 it is next to the firewall, near the battery.

If you take it to a shop for a drain and refill (pretty cheap - usually well under US$100 including new refrigerant) the high pressure port is in front of the radiator near the left headlight.
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