The engine stalls within 10 minutes of starting it, it will start up again, and not die again until next time it is started. Mechanic changed fuel filter, MB dealer did every test under the sun, because it does not do it all the time no one can find anything wrong with it. I was running it with bio-diesel, then I switched to diesel, it stalled more frequently with the bio diesel, but it still stalls with the diesel. I would appreciate any suggestions, I really don't know what to do (and neither does my mechanic)