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.Google+
Car Problem Reports
Mercedes-Benz CLK430 Engine Performance Problems Due to Crankshaft Position Sensor Failure
Mercedes-Benz CLK430 Problem
Average Mileage: 97,533 mi (57,000 mi - 137,134 mi)
My vehicle would start and was able to drive about 1/2 mile before I lost engine power. The vehicle would not start until the engine cooled. I paid $338.00 to have a diagnosis on the vehicle and replacing the crankshaft position sensor.
Visitor, 2000 Mercedes-Benz CLK430, 93,600 mi
still working to replace crank case position sensor, bolt holding sensor is under sensor, with heat shield making difficult to remove, car runs like new when it does start, hope I can get that sensor out.
Visitor, 2002 Mercedes-Benz CLK430, 120,000 mi
how do I get the connector off if the end (part you bend down) broke off? thank you
Visitor, 2001 Mercedes-Benz CLK430, 67,000 mi
Car chokes in traffic but after cooling down it starts rough a bit