The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.Google+
Car Problem Reports
Mercedes-Benz CL55 AMG Engine Performance Problems Due to Crankshaft Position Sensor Failure
Mercedes-Benz CL55 AMG Problem
Average Mileage: 59,500 mi (43,000 mi - 76,000 mi)
Visitor, 2003 Mercedes-Benz CL55 AMG, 43,000 mi
After 3 hours of ride i stop the engine and when start again developed a stalling and will not start
Visitor, 2003 Mercedes-Benz CL55 AMG, 76,000 mi
Engine cranked until timeout, but would not start after sitting in hot parking lot for three hours.
car will not start until it's cooled down.