Mercedes: ML320 Stalls in traffic, alcohol fuel, vapor lock

Question
I have a 2000 ML320.That runs fine with only 70k miles on it but every now and then will stall while sitting in traffic,no skip or shutter just shut off. then will not start for awhile when it restarts it runs like nothing was wrong any help would be appreciated

Answer
Kevin,
Could be vapor lock. With the alcohol fuel, there is more sensitivity to boiling of the fuel. However, there is also a possibility the the fuel pump control relay is going bad.
It is important to determine if it is fuel delivery or electrical before trying to replace parts.
Purchase a can of fuel injector treatment. Techron in a black bottle is good. If you have not changed the fuel filter recently, I would do that.
Good Luck
Robert