Mercedes S430 2004. When the motor is hot, the car requires two or three trys to start. I have a healthy crank, so there is not a problem there. I had the camshaft senor replace but to no avail. I was told that it may be crank sensor problems, replaced that but still have the same problem. The repair shop does not have the correct computer to show the actual codes. How can I fix the problem?

thanks

Ray