Car Problem Reports

Mercedes-Benz ML500 Engine Performance Problems Due to Crankshaft Position Sensor Failure

 
Mercedes-Benz ML500 Problem
28 Reports
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Model Years Affected: 2002, 2003, 2004, 2005, 2006, 2007

Average Mileage: 82,239 mi (16,500 mi - 170,000 mi)

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The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.

  • Visitor, , 85,000 mi

    I had same issue with engine stalling after driving fine for a few minutes, up to an hour. I'd park the car, start again to drive, and engine stalls as soon as I am stopped at a light or stop sign. It will only crank but not start after this happens. I called for a tow, and before tow arrived, it restarts (only to stall again after driving about 2 miles) After researching issue, I had my crankshaft position sensor replaced. Happy as can be, drove towards home, only to have car stall AGAIN. However, this time it will restart, but as soon as I try to put it into drive or rev the engine in park, it stalls. Called a mechanic to help pull codes off computer (both times check engine light is illuminated), it says bad crankshaft position sensor. WHAT? So my mechanic drives it to his shop, but before arriving it stalls on him. Sitting at the side of road, he decides to check his work on crankshaft position sensor replacement from yesterday. With engine running he tries to feel for wire/sensor. It stalls as soon as he touches the wire. He restarts car and wiggles the wire again, and low and behold it stalls. Conclusion is that the sensor is probably ok, but the wire connector is bad. He is in the process of repairing wire now because MB wants $900 (yes with eyes wide open and jaw dropping) for the entire engine wire harness since they don't sell just the connector. Will update after repair to verify that was the issue.

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  •  Rookie

    Car stalls frequently, usually at intersections of heavy traffic, hard to start. Starts sometimes after 20 to 45 minute cool down. Was diagnosed by Mercedes Road service person, and myself since I had one replaced in my 2002 S450, as a crankshaft sensor. The Mercedes dealer charged $120 to diagnose the problem even though I informed them of the situation. It appears the Crank Shaft Sensor is an ongoing problem across some years and models. The ML also needs a Power Steering Pump, quite expensive. I read on the Web that, for some reason, Mercedes uses "Cheap" motors. I feel a prestigious company like Mercedes, recognize chronic problems and subsidize the repairs in some fair fashion.

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  • Visitor, , 157,000 mi

    replaced crankshaft position a few months ago and now it is happening again.

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  • Visitor, , 98,045 mi

    Crankshaft Position Sensor Failure, $380.00 to repair at dealership

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  • Visitor, , 74,000 mi

    Had to replace crank sensor and fuel pump after vehicle died at intersection. Cost to repair $1250!

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  • Visitor, , 40,000 mi

    Typical symptoms- car stalling.

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  • Visitor, , 16,500 mi

    problem started leaving work, motor stalled . pulled over, then engine cranked several times and restarted after a few times. drove about 10 miles to my home. the next day however, drove a few times and vehicle drove fine. after it sat about another 4 hours i needed to go to the pharmacy, so went to start and all that took place was just crank , but no start. a half hour later, it started. i ran inside the house to grab my phone to go and discovered the motor had stalled again. after another 10 min. i checked the fuses, all was well. i then proceeded to trouble shoot. then located the fuel filter located next to the gas tank. tapped a few times, tried to start. it started. i backed out of my driveway to turn vehicle around and backed into the carport. after putting into park the motor stalled before i turned the key to the off position.

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  • Visitor, , 72,006 mi

    car would not start. 2hrs later it started. I took it to Dave's Foreign Car Repair He fixed it for$378.79. Hope it works a while. Seems like I am having a lot of problems. the car has been taking very good care of I bought it new for my wife.

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  • Visitor, , 88,000 mi

    Just purchased, haven't been give. It yet but already they've delayed by a week to sort this issue

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  • Visitor, , 122,000 mi

    A week earlier the engine cranked a little long but started. The CEL came on but when off when I turn off and back on again. Today engine cranks and would not start. OBD-II code P0335.

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