Defective Cam Position Sensor

What is your question?

After taken my car to Mercedes-Benz for a diagnotic test I was told that the car have a fauilty cam sensor. The fuel injection module as a faulty cam sensor and the cam solenoid is not adjusting the cam. My car use to start/crank over with no problem. Now my car want start/crank over. Some time the car will start/crank if I take the car out of park and put the car into N and back to park. My question is it the defective cam position sensor preventing the car from starting/cranking over. Thank U