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Mercedes-Benz S500 Engine Performance Problems Due to Crankshaft Position Sensor Failure

 
Mercedes-Benz S500 Problem
18 Reports
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Model Years Affected: 1996, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006

Average Mileage: 121,754 mi (78,350 mi - 200,000 mi)

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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.

  •  Rookie

    engine will but not start when hot will start when cool off.

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  •  Rookie

    Car would crank, but wouldn't start...Waited about 15 min, starts with engine light on. Diagnostic check revealed crankshaft position sensor at fault. replaced for 281.00 No further problems

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  • Visitor, , 143,000 mi

    Car stalled when enginge gets hot and starts when engine cools off. Diagnostics will not pick up the problem. Installing a new sensor solves the problem.

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  •  Rookie

    abs light came on. very hard starting when warm. loss of any gas milage.seems as if batery is being drained.

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  •  Technician

    This failure causes the engine to stall. It may or may not restart right away. Most any car made in the past 20 years has these and they wear out and cause stalling. Camshaft position sensor is a similar part which causes similar problem. Both Bosch parts are available on ebay for about $50 each and they are easy to change for even a novice with instructions you can find online. When my car started stalling I replaced both, no problems since.

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  • Visitor, , 78,350 mi

    Same as described/replaced sensor

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  •  Rookie

    Car will start while cold , after running turned off ; try to restart ?will not start .
    Engine check light indicator on , car crank and continue trying to start but will not .
    my email is jplr6216@yahoo.com

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  • And finally the wires broke coming off the CPS switch

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