I'm to the point in restoration of my 81 that I'm looking at the cruise control. It came factory with a vacuum servo missing the control module. I do happen to have a newer stepper motor controlled servo with the control module from my rust bucket 1982. Is there any consensus on which is the more reliable of the two? I'm not fixated on keeping the car 100% original since I don't have the original plate and data cards.

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1978 Mercedes 240D
1981 Mercedes 240D
1982 Mercedes 240D

I would go with the electronic one -- that way, you eliminate yet another source of vacuum leaks .

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

Electronic version is no doubt more serviceable. Spare units are more plentiful. Mine is the vac version and it works great to this day. Last time i was browsing for new parts i saw a replacement vac actuator for mega bucks and im sure thers fewer good used units out there.

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Current fleet
2006 E320 CDI
1992 300D - 5speed manual swapped

former members
1984 300D "Blues Mobile"

1978 300CD "El Toro"

...of course, it sounds way cooler to say that your cruise control is vacuum controlled!

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

I would stick with the vacuum operated one...maybe be some not so nice words said while attempting a upgrade install. Mine works but like all the rest the amp is bad but I can accelerate using the little lever....thought about fixing it....but I don't often go on a long enough drive to cruise...

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