I have a new fuel accumulator to install when I have time to do it.
One interesting thing about the run-die episodes: it involves temperature. Engine runs perfectly until it suddemly dies. Restarts get more difficult as it continues to heat up. 5 minutes engine off with the hood up restores engines ability to run for a few miles, and the more it cools down, the longer it will run before dying. Seems a typical electronics failure. My ‘86 420 SEL did this when the crank position sensor on the flywheel failed; this engine seems to have only a front sensor for tdc.

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Providing a home for these cars:
1951 Buick Special De Luxe
1977 Rolls-Royce Silver Wraith II
1970 Rolls-Royce Silver Shadow
1986 Mercedes-Benz 420 SEL
2005 Mercedes-Benz E 320 CDI
2012 GMC Sierra 1500 4X4
1927 Pierce-Arrow Series 80
1931 Pierce-Arrow Series 43
1926 Ford Model T coupe