92 300D 2.5 turbo. The cruise will set or accel but it does not stay on all the time. It seems worse at higher speeds. Once it is set sometimes it works for a while and dropes off but if I hit resume it tries to reset. Other times it only sets for a second but if you hit resume it tries to reset.
Any Ideas where to start?

most likely the little cruise 'computer' under the dash near the driver's legroom.

ps.. if you figure out a way to fix it, make sure to fill us in.

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Mine doesn't work either. I am going to try the "resoldering" fix mentioned in the forum archives. Search for it and you will see what I mean.

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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

http://www.fuelly.com/sig-us/40601.png

So far checked all data pro and saw that tire size is critical. changed rear tire to matching tire and cruise now sets and stays for a few miles than starts surging and loses lock. Hit resume and sets for a few more miles and loses lock again. Any ideas?

Yes, it is the cruise amp. It is always the cruise amp........

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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

are you running dif size tires? if so, bad idea.

99/100 its cruise amp, you can try resoldering if you have jedi knight skills and a whole lot of patience, or just call the benz store and get a rebuild for $160 and be done with it.

test the actuator per GDL online procedure 1st, of course.

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Paul
Benz-less
I need an SDL !

You might want think about an after market cruise control. these old MB units will always be a problem.

www.peachparts.com/shopforum/showthread.php?t=256841

post #3 will link into an old thread back in 04.

post #4 will link into "The official Audiovox CCS-100 Install Thread".

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

are there any warning signs its going out?

my '95 E300 Diesel feels like a supple mechanical bull when I have it set, at any speed....


it first started on going downhill, and I've only had the car for just over 10k miles... so I figured it was just its way of holding back. now it does it on level ground too

when mine was kicking out after setting, it turned out to be the actuator under the hood. mine is still wonky though, strangly enough it never works in the moring on the way to work, but it always works on the way home in the afternoon. also, since my speedo is 40% slow, I need to be going a minimum of 75 or so to get it to engage, this is around 55 on the speedo

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)

Mine has lost its mind as well. Swapped out servo/actuator - still behaves the same. Sometimes it works, sometimes I have to fight with it like an ex-wife.

My unit is under the passenger floorboard. You have to carefully remove the circuit board from the aluminum housing and check the underside of the board for loose solder connections. Sometimes you can see a carbonized component, most of the time it remains a mystery. You can render a cruise amp worthless for core by doing this. Maybe its just best to pull it and get a reman from here

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327K on 1986 W201, 602.911, 722.414 2.5 190D ("The Red Baron")
139K on 1993 W124, 104.942, 722.433 2.8 300E ("Queen")

http://farm5.static.flickr.com/4081/...0bb92d3c_m.jpg http://i370.photobucket.com/albums/o...g?t=1325284354

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.
- Albert Einstein

take a walk down memory lane...