Cruise control works once in awhile.
No response when control stalk is pushed to set. Sometimes the cruise will engage - I find out when I let up on the gas and realize the it is engaged and working, sometime after an attempt is made to activate it. When it works, it is steady when there is a slight load on the engine but kindof jerky otherwise.
Also noticing the tach is intermittent - if this has anything to do with the cruise control.
I'm suspecting a vaccuum leak somewhere or a or a problem with the linkage.
Ofcourse the MB dealer says the control unit, at $600 to replace it. They say it's routine, and I believe it, but would like to rule out other causes first.
Thanks for your help.