The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.Google+
Car Problem Reports
Mercedes-Benz CL500 Engine Performance Problems Due to Crankshaft Position Sensor Failure
Mercedes-Benz CL500 Problem
Average Mileage: 93,750 mi (61,000 mi - 121,000 mi)
Visitor, 2001 Mercedes-Benz CL500, 121,000 mi
I have the same problem. My car stalls for no apparent reason. Sometimes it happens often (more than once per day, sometimes it may go weeks before a stall. Usually after it stalls if I wait approx. 10-15 mins the car will start right up and I can drive away like it never happened.
Visitor, 2000 Mercedes-Benz CL500, 100,000 mi
car will start and run for 5 or 10 minutes and then die. It will restart in 1 or 2 minutes or 15 or 20 minutes. CPS fixed this problem
Visitor, 2005 Mercedes-Benz CL500, 61,000 mi
Engine died while driving on the freeway. Pulled over with no power steering. Was able to restart and drive to dealer. Diagnosis was failed crank position sensor.