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#2
05-11-2005, 11:40 AM
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Hunter, your input to this site is nothing short of amazing and appreciated. Only hope enough people have the common sense to print a lot of your references off and file them. Or perhaps start an electronic file. The other thing is it may stimulate them to get a system up and running by aiding there confidence to tackle it. Hope you are able to keep it up. You will not believe this but two of the three cruise control systems do not work on my mercedes. The hard one looks like a dealer installed aftermarket. When i get to that one will probably just replace it either with an aftermarket or install factory parts off a wreck and then fix that one too.
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#3
05-30-2006, 04:20 PM
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R129 Cc
Hunter,
My '92 500 SL CC has not worked in a year. Sometimes it will work for a few seconds when the car and engine are cold or when it is very damp outside. It sounds to me like a bad GROUND someplace. No one seems to have tackled this installation. Even GDL has said they do not know much about that system. Is there anyone out there who has info? 
__________________
roadkingmike@aol.com Coast Aero Support Services, LLC '92 MB 500 SL '01 BMW 525i Sport '98 Harley Davidson RoadKing '74 BMW 3.0 CSi - Gone to a good home
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#4
06-24-2006, 02:49 AM
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Where to find the cruise AMP in a W126
Where to find the cruise AMP in a W126.
Under the driver side dash. The attached picture shows which one to disconnect for service/testing. Last edited by whunter; 06-24-2006 at 03:16 AM.
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#5
03-21-2009, 11:20 AM
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Isn't there a thread which shows which components to replace inside the cruise amp, and gives part #'s from Radio Shack or some-such?
__________________
Jimmy L. '05 Acura TL 6MT  2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China"  Scar engine installed'81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John
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#6
03-21-2009, 12:08 PM
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Answer
Quote:
I have deleted several that where nice, after 99% of the data (pictures) became dead links, making them useless.This is why I spend so much time in the archives re-size, crop, and attaching pictures to technical threads. :EDIT: Found this one. Cruise Amp Repair http://www.mindspring.com/~houlihan/merc/cruise.htm Last edited by whunter; 03-21-2009 at 12:19 PM.
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#7
03-21-2009, 12:47 PM
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I found one for a Porsche amp...it's a little different, but all the same company.
I have been troubleshooting these for a while now, and am starting to get pretty convinced that it's simply connection and solder issues. Several I have gotten actually had cracked solders. After swapping a few amps out of my car, I am getting a hard time getting any amp (even my good one) to work. That leads me to believe that the connector for the amp is getting worn.
__________________
My Primary Driver - '85 300CD - 4-speed conversion, 2.47 rear, lowered, euro headlights, rebuilding (not restoring so much) Wife's - '08 Saab Sportcombi Aero Riding a '03 Yamaha Warrior
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#8
03-21-2009, 12:47 PM
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Quote:
Keep searching Oh Great Keeper of the Archives. Preciate chur work! 
__________________
Jimmy L. '05 Acura TL 6MT 2001 ML430 My Spare Gone: '95 E300 188K "Batmobile" Texas Unfriendly Black '85 300TD 235K "The Wagon" Texas Friendly White '80 240D 154K "China" Scar engine installed'81 300TD 240K "Smash" '80 240D 230K "The Squash" '81 240D 293K"Scar" Rear ended harder than Elton John
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#9
03-21-2009, 06:28 PM
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Brake Bulbs ????
In the first article that Hunter posted, thank you large, there is a mention of not using US type 1157 bulbs.
When hitting the brakes, shutting off the CC is the resistance seen by the amplifier? I thought the brake application switch went to ground to close the circiut.
__________________
1984 300SD turbo 126 "My true love" God made me an atheist and who am I to question His wisdom
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#11
07-23-2011, 06:47 PM
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How to go back in time & recover the good ones
Quote:
The link you found again was again broken, so I traveled back in time & got it: http://web.archive.org/web/20090925054414/http://www.mindspring.com/~houlihan/merc/cruise.htm Does this look familiar: Home Repairs Cruise Amp Repair Inoperative or malfunctioning cruise control is often caused by a bad amplifier. The amp can often be repaired simply by resoldering the connections on the circuit board. I used this procedure to fix the amp on my 1980 240D as well as my current 300D. The amplifier is a small rectangular box measuring roughly 4" x 6" x 1". It's usually located underneath the driver's side dash.....above your shins. Remove the long connector attached to one end and then unscrew the whole box and bring it to your shop. You'll need to remove the aluminum part of the amp. Simply pry back the metal tabs that hold it on.   Slide the cover off and you'll expose the circuit board. Look carefully at each component to make sure there aren't any burned parts. If so you'll have to replace them or the whole amp. You probably won't find anything.   Get a good solder iron and heat it up. Make sure you have good lighting and a comfortable chair. A magnifying glass will help. Your objective is to quickly reheat each solder joint. A hot iron is essential. You need to make sure that you re-melt the whole joint. You may notice a sort of shockwave ripple across the joint as it melts. This is how I determined ...... I hope that some find this useful. -Sveinn
__________________
1986 300SDL 1987 300SDL 1997 F-350 Powerstroke Turbo Diesel 1969 32' Luhrs Perkins HT3.54M Turbo Diesel WVO & biodiesel when I can get it (there is a de-facto ban on biodiesel in CA - ask the Water Quality Resources Board why underground storage isn't allowed for biodiesel - heck, you can drink the stuff  )
Last edited by whunter; 07-24-2011 at 09:20 AM. Reason: attached pictures
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#12
07-23-2011, 07:56 PM
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Or general electrical troubleshooting of various components, to include the cruise control:
http://userweb.windwireless.net/~jimc/mamerepairs.html#acctest
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#13
02-16-2012, 02:56 PM
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So what is generally the problem when the cruise stops working on a W124? Or could it be a bunch of stuff?
__________________
1991 300 D 2.5 Turbo, 220k also in the family: 1981 240 D 185k 1991 350 SD 185k 2006 S 500 2005 SLK 350
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#14
02-21-2012, 01:50 PM
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Quote:
- failing cold solder joints. The joints are crystallizing due to age and perhaps even become intermittent connection points. - failing capacitors. Lose the ability to hold speed or "remember" speed.
__________________
1990 300E 124.030 chassis 103.983
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