Hi all I have a 2001 ml55 amg with the 5.5l that has a no start problem that I can't figure out. It just quit on me due to the fuel pump burning out so I replaced it. Since I replaced the fuel pump now have a no start problem at first I thought it might have been the crank position sensor but replaced it today and still won't run. The motor turns over and fires however as soon as you let go of the key it dies and after every two to three attemps of trying to start it the motor backfires. Any ideas or suggestions would be greatly appreciated. Thanks Matt