Okay, my cruise control has progressed from mild surging to a state where it no longer is tolerable. It acts like you are pumping the accelerator very quickly. I grabbed a cruise amp from an 82 SD and tried it out. It works okay for a few minutes but soon starts to surge intermitantly and especially on downgrades. I have tested the system according to GDL's instructions and all seems well. The only test I cannot do is the speed sensor test. My actuator is a little noisy and is pulling 180-185mA, the spec is 120-180mA so I am thinking it may be my actuator. Bottom line is this: These friggin' things are too expensive! GDL wants @ 1/7th the value of my car to rebuild my parts. Junkyard is an option but who knows if it'll work? I am considering replacing the MB system with an aftermarket cruise unit. I may even be able to wire the MB cruise switch to the aftermarket unit so I can retain the MB "look". I am unsure if I will be able to use a vacuum system? I know MB did in the earlier models. There is a possibility that there is an electromechanical aftermarket system available too. Prices I am seeing are $80-$120 for an aftermarket system and that sure beats the price of a rebuilt MB system..... Any thoughts on this? Thanks, RT

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