jmbeam, I don't follow your posts like a groupie but it seems your '97 E300 tranny is stuck in second gear. Have you thrown as much money at it as replacing the conductor plate and the connector seals? That's about $150 in parts plus a SDS reset before embarking on an engine and/or transmission swap. It seems to be what gets a lot of 722.6's going again. You have more information than the equivalent of an AAMCO tech's advice, right? Have you consulted with MB Doc in the tech forum?

Sixto
87 300D