Exactly where is the low pressure valve on the 99 ML320? I need to put in some coolant for my girl friend's ML. Thanks in advance, Ben H. Carter

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Ben Harrison Carter
1999 Mercedes ML320 87K
1992 Mercedes 300CE 89K
1995 Corvette 29K -- Sold Dec 09
1989 Mercedes 420SEL 99K -- (Sold 4/08)
1968 Mercedes 230S (106K) (Sold 9/06))
1976 Mercedes 450SEL 130K (Just sold - 06)
1961 Mercedes 220Sb (sold years ago)

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.