Hi people,i need to find out what could be the cause of a 99 ml 320 not being able to turn wheel,1st a loud noise and then it stopped after we refueled it with ps fluid,now casnt turn whel>
Help

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W123 1985 300TD naturally aspirated

On the bottom right side of the radiator there is a hose that is attached with a clamp. On your model year there was actually a campaign to replace that clamp. What it does is connect the power steering hose to the radiator. Sometimes the clamp expands and when you start the car the pressure blows the hose off the male end of the connection on the radiator. If the clamp is still there you can reattach it (I believe you need an 8mm socket) for the time being, but you will need to replace it. You can go to a dealership or to a parts store. The clamp will run you maybe $5 if you prefer to do it yourself.

Both of the PS hoses that go to the radiator must be firmly attached; otherwise PS fluid will leak out and you will ruin your PS unit if that is not corrected. Attached these hoses firmly with new clamps or tighten the old ones to insure no leaks exist and then fill the PS unit with PS fluid. If it still makes noise, put more PS fluid in until it stops. BC

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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)

The original lower hose is too short. if it has blown off or is starting to pull away from the fitting on the radiator (regardless of how tight the clamp is) go to any dealer and they will replace it for free with a slightly longer hose. All ML's 98-03 are covered for 10 years, unlimited mileage for this problem.

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

The recall at the dealer only changed the clamp,now busted and replaced once more,but i never knew of the longer hose option,i take it its the low pressure hose.

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W123 1985 300TD naturally aspirated