Question about 1994 Mercedes-Benz C-Class
Sounds like a vacuum leak. This will cause the idle speed to be high. Additionally most cruise controls are operated by vacuum pressure. Look around the intake manifold for disconnected rubber hoses. May have popped off from dry rot or stretched out etc. Find the vacuum leak and fix it, both problems should go away.
Posted on May 04, 2013
Testimonial: "Checked for leaks, visual inspection and with brake cleaner. Mechanic also checked for leaks. Changed MAF sensor, air temp sensor, O2 sensors, throttle body, knock sensor. Do I need to reprogram something?"
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Posted on Jan 02, 2017
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