I have a 98ML320that I've had for years, my wifedrive it. Its been a great car and is still in great shape but I'm have an issue.I used to be a mechanic and Ian not figure it out. Car would start fine and after about 10 min. it would die (doesn't matter if your driving or parked it would just die) and will not start again for about 35 min. then you can drive it all day but if you turn off the ignition then it starts all over. checked spark, fuel pressure and not one code in computer. repalce fuel filter cleaned TB and replaced plugs.(due anyway) and the cam sensor and crank sensor (know problem with the ML's). Ok so now I took to a independant shop that works exclusively on Merc & BMW's and he could find nothing wrong. I am at the end and other than the computer I have no idea. any help out there would be greatly appreciated??

 

its the fuel ignition sensor..i had the same problem with my ML...