Cruise control actuators can (but rarely) fail. That's why you always see them (and power steering pumps) at salvage yards...nobody needs one. My very UN-sciencetific analysis...lol. IIRC there is a small arm that rides on a (looks like plastic) ribbon. The ribbon is what wears out.
cuiseotrol need info
hi all,trying to diagnose the cruise on a 85 380sl.looking at the actuator in parts they call it a vacuum actuactor.that confuses me. it has no vacuum hoses going to it and it does have an electric motor on it. can any one explain this.....does the motor run an internal vacuum pump? is there a diaphragm inside or what?????? I have Mitchell on demand but can find no info on how the actuactor works. please help
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