Hmmmm. I remember talking to the factory service rep for Ferrari back when they introduced their fuel injected 308s.
He told me, and the Ferrari dealer mechanic confirmed, that an Italian tune-up was no longer needed to keep the plugs clean and prevent carbon build-up since the mixture was much better metered than with Webers. The mechanic said that he'd set Webers to perform up to about 100 MPH or 100 MPH and over. The 100 and over setting required throttle blipping and high speed "Italian Tune-ups" to keep the car running right.
So, what's so different about a fuel injected Mercedes that it requires something Ferrari does not? I believe they were using the same Bosch systems.
What do the forum gods of combustion have to say about this?
Just some Easter ponderings.