Thanks folks ... the following information was sent to me from another fellow I know. I have already made my appointment and should be good to go.
2011 Mercedes Benz SPRINTER gas recirculation valve (egr valve) service bulletin (Bulletin SC-2012120002)
Bulletin Date: Feb. 1, 2013
Component: Gas recirculation valve (egr valve).
Bulletin Summary: Mercedes: the engine control module (ecm) may fail from feedback signal to valve due to humidity entering exhaust gas recirculation (egr) valve, causing an electrical short circuit and software needs updating. Model 2010-2011 906.