I have had them on the rears or 2 years now and love them! Make sure you get the red special d's. They should be ajustable like the shocks are....my rear shocks have 250k on them and I am just now thinking of turnning them up one turn to make them ride better.
Mb/dodge/freightliner are all the same van just different badgeing! Its getting the crossover part number that hinders stuff it mainly gos like this 2006 snd older and then 2007 and newer only new thing on the 2011 and newer is the bluetec stuff.