Car Problem Reports

Mercedes-Benz ML320 Engine Performance Problems Due to Crankshaft Position Sensor Failure

Mercedes-Benz ML320 Problem
39 Reports
Me Too

Model Years Affected: 1998, 1999, 2000, 2001, 2002, 2003

Average Mileage: 129,811 mi (50,000 mi - 272,000 mi)


The crankshaft position sensor may fail. Symptoms of this are: The engine will crank—but not start—especially when the engine is warm. The car may start again if it is left to cool off, but it may run roughly or have poor performance.

  • Visitor, , 167,000 mi

    It has not been fixed yet. When I turn the key, i can hear the engine "click" and make a stalling noise. It usually ocurs after I've turned the car off and try to restart after about 15 minutes. I typically allow it to "cool off" and then it starts up fine. Occassionally, I will hear a stalling sound when I try to start it in the morning. It will start, but it sounds like it's stalling.

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  • Visitor, , 127,000 mi

    My car shuts off after running for approximately 10-15 mins. It shuts off when i come to a stop. I had the battery and alternator checked. I was told i need a fuel pump,then i was told i needed a starter. None of these answers felt right. So i decided to research the problem and im glad i did. By reading the other post it will save me some time and money thanks.I will post later after i have the crank shaft sensor replaced.

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  •  Rookie

    the car stalls and won't start several times and it would not start sometime 30 or 40 minutes later, but still it won't go far before it stalls again.

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  • Visitor, , 135,000 mi

    Car died at a stop light - every light on the dashboard came on - I tried to restart - almost sounded like it was running - waited about 15 minutes dorve it to a garage - unfortunately not Mercedes a new crankshaft POS was put in - still cut off.

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  • Visitor, , 98,000 mi

    Having the same issue, i've changed the battery, mass airflow sensor, and trottle position sensor, and still cranks and dont start, only after like 15-20mins. Then also another problem just came along, when it finally starts, it stays in 1st gear.

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  •  Rookie

    I don't seem to have these common problems but I am being told it is the crank sensor.

    My problem is the car starts ok and drives ok for about 30 miles or 30 minutes. Then if I try to accelerate above 50 mph - the car doesn't react - i put my foot flat down and it just stays at 50 mph - it doesn't stall or anything like that but then when i get to lights and stop the motor is very rough - like it is running on 4/5 cylinders. Does have anyone had a similar experience ?

    I have many different answers from people.

    1. they say rocker gasket broken and oil getting into spark plugs - dos make sense to me.

    2. others they say changer spark plugs
    3. change leads
    4. change fuel filter.

    Any help really appreciated.

    Also suspension seems very rough - now I have ben told i have sports suspension - it there any way to smooth it out can i change anything on suspension.

    Also what tyre air pressure should i put in the tyres some say 44 psi but that seems hight to me

    thanks for a lll help


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  • car cranks and drives after a while it shuts off and will not start until after a few minutes and it cools off

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  •  Rookie

    My ML320 would run hot and shut off while I was driving or at a stoplight. My mechanic put on new fuel pump even though I had gotten a fuel on April 27, 2009. Now he thinks its the crankshaft position sensor.

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  •  Rookie

    engine shuts off after warming up. will restart after engine cools off but runs & idles rough

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  •  Enthusiast

    Got towed to dealer by AAA. Cost to fix $450 parts and labor

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