I may try this on my M102! I have to wait about 30 seconds in the morning to take off and it stumbles at first, then once I am moving for a few feet and the engine has done some work it clears up the hesitation. I also get a slightly rough idle. Well it is a heck of a lot better now than before, but I can still feel her running and I want it a hair smoother. I have replaced all the rubber hoses and all the vacuum connectors and that helped a lot as you said but still not perfect. That and I think I need to open my Idle Air Control valve a hair more to get her to idle at 1000RPM's instead of about 900 that it does not when cold. When I unplug my switch on the throttle linkage, to simulate the gas pedal not at the stop my RPM's go to 900, I assume the IACV closes at the point the switch is disenganged and that of course seems like the high idle point. Oh well I will try the EHA first if my problems sound like yours was running.

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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....