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Old 11-19-2010, 04:04 PM
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1984 300SD, Anyone on this forum repair cruise control amps?

My cruise control amp just went out on my 84 300SD, I was wondering if anyone on this forum can repair the 2 I have or is there a way I can repair it?
Thank You ahead of time!
Jim

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Old 11-19-2010, 04:44 PM
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You can do it yourself. Do a search for "cruise control amp resoldering".
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Old 11-19-2010, 05:00 PM
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OK, Thanks! I will try that.
Jim
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Old 11-19-2010, 05:05 PM
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Ive repaired a couple of these. In addition to the dry-joints, there's also a couple of caps that dry up and the set-speed/hold double reed-relay can go leaky as well as the set-speed reference voltage cap causing slowly dropping set-speed.

The FET is an odd (Old) one in that reference circuit and great care is needed when working on that part of the circuit as static or poor iron-grounding and static precautions can destroy it.....
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W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

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Old 11-19-2010, 09:51 PM
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That is one really nice Wagon!!!

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