As regards techs in the Boston area, be advised that at Foreign Motors West in Natick, MA (a dealer), there's a tech there who drives a 500E. His name's Paul Lussier and his phone's 508.903.5311. Give him a try, he's an exceptionally good tech.

Tom, actually Porsche did nothing to the 500E motors. The motor's the same as the 500SEL motor (the SL had a different injection system initially, but after '95 or so went to LH injection) except it does have 500E-specific cams. Porsche did the modifications to allow the installation of the 8 cylinder motors & larger transmissions, installed those components (at their Rossle Bau plant, where they'd previously assembled 959s), and did final assembly work. Porsche also did much of the chassis/suspension development work.

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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo