I am troubleshooting the cruise control on my 88 240DL.
So far I have checked the vacuum switch at the brake, the vacuum canister, solenoids that control vacuum to the servo/gaspedal, vacuum lines. So far they all check out perfect.
Can anyone point me out to a website or online document that describes the cruise control system? I have not found any circuit board yet that controls the solenoids. I assume there must be one? Where does the cruise get its signal to confirm correct mph is being maintained?
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