Olivier yes the sov was new. In the instance you speak of the sov not only stops fuel flow it also measures fuel temp so there are a couple reasons the cel could have come on. I am pretty sure my current issue is computer related unfortunately I cannot pull the Mercedes specific trouble codes all I can access are the generic so my ability to diagnose is severly limited. I have a good relationship with the shop I am taking it to so I may just have them pull the MB specific code and diagnose it my self I have not decided yet since my schedule is pretty busy over the next couple weeks. Thanks for the thoughts.

__________________
Keith Schuster
2006 E350 98K miles
2013 Ford Explorer 15K miles