Prepping my 300D for sale I decided to try and tackle resoldering the cruise control amp because it only worked intermittently and that is almost as good as not at all. On cold mornings or days it wouldn't work at all and on warm to hot days it would work without interruption. Here is what I found after resoldering 400 joints. My amp was a rebuilt already date code said 92 on it so some joints looked more robust than others. If you want to save time and not resolder 400 joints here is what to look for. These boards are wave soldered at the factory, basically they make small waves in a vat of tin and lead and run the boards over. As the board goes over the level of penetration of the solder depends on the board temp too cold and you get no penetration (similar to welding).

The ones that I believe failed on my board are the joints at appear to be flat, with a pin sticking out. This is opposed to the nice little mound that you see on a typical solder joint. There were probably 50-60 that were this way that when I touched an iron to it, it disintegrated immediately and took a large amount of solder added to the joint to properly mound it back up. Focus on these and I believe you can save your self quite a bit of time and money as opposed to buying a rebuilt that the same thing is going to happen to in the near future.

The cruise control picks up faster now and seems to be less jerky and just an overall beter ride like a Mercedes should be.

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2003 Dodge Ram 2500 Cummins - Georend fully built trans, Banks Big Hoss Bundle, Smarty Tuner, 5" turbo back exhaust. 500 HP and 1100 ft/lbs to the ground.
1979 Mercedes-Benz 300CD - Lost to a four car pile up on 275, Thank You Michigan Drivers.
1986 Mercedes-Benz 300D - Sold, Euro non-turbo car.

You are giving me some encouragement to get mine done. I took the board out of the box looking for any cracked traces or cracked solder joints. but that is as far as I got. did pick up a couple form PNP.

If this doesn`t work might go with the Audiovox ccs-100, there is a thread on it www.peachparts.com/shopforum/showthread.php?t=219993
Charlie ☺

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Link doesn't work for me - don't know why?

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Charles
1983 300D, bought new, 215k+ miles, donated to Purple Hearts veterans charity but I have parts for sale: http://www.peachparts.com/shopforum/mercedes-benz-cars-sale/296386-fs-1-owner-83-mb-300d-turbo-rebuild-parts.html

Yep. Resoldered my totally inop cc amp, and now it works perfectly.

Managed to resurrect the wiper delay relay and Tach amp too!

Cool beans!

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Neil.


1991 190E 2.6 170k
1995 E320CA 57k
1999 Chevy Tahoe 98k
2000 R1150GS 45k
1983 300CD 178k - sold, but not forgotten

I've had luck resoldering the Climate Units....but so far no cruise amps....they always failed again. Which is why I am switching to an after market unit. (audiovox)

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

I fixed it, try now

Charlie ☺

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Thanks, link works now.

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Charles
1983 300D, bought new, 215k+ miles, donated to Purple Hearts veterans charity but I have parts for sale: http://www.peachparts.com/shopforum/showthread.php?t=296386