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. Communicating these specific symptoms to your technician can save diagnostic time.Google+
Car Problem Reports
Mercedes-Benz CLK500 Engine Performance Problems Due to Crankshaft Position Sensor Failure
Mercedes-Benz CLK500 Problem
Average Mileage: 56,625 mi (30,000 mi - 80,000 mi)
Visitor, 2003 Mercedes-Benz CLK500, 47,000 mi
Had my car diagnosed ad it was not starting because of crankshaft positioning sensor. my question is how do you know which sensor? LEFT or RIGHT?
Visitor, 2005 Mercedes-Benz CLK500, 80,000 mi
the motor will not start if the car sets for a while the motor will start
Visitor, 2005 Mercedes-Benz CLK500, 45,000 mi
One day, the check engine light went on. Before I could get it to a shop, it died at a stop sign. I had it towed to a shop, and they diagnosed it as a bad crank position sensor. I got it fixed for $250. It's been running great for over a year since then.
Visitor, 2005 Mercedes-Benz CLK500, 67,000 mi
Yes same problem, car cut out in middle of backing up & would not restart & found it to be the sensor.
My car was suddenly stop on the road without any notice, I tried to start but it didn't work, and I cannot pull over my car to the sideway. After 45 mins, I started my car and it worked, and the Check Engine light was on when I re-started my car. However; it stopped again after 10 mins driving. I took it to the dearler, they replaced the crankshaft position sensor.