Tom,
In your earlier post you'd indicated that "Porsche changed the fuel injectors". That's simply not the case, nor does the author you quoted (I've read the piece before-good article) imply anything beyond that the Bosch LH injection was specified for the 500E. At that same time, MBZ was already using the LH injection system on the 500SEL, but the SLs (introduced back in '90 before LH was available) soldiered on with the KE through '95 or so.
That was my only point, so hope I helped
