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Cruiswe control module

Started by raueda1, 21 September 2022, 01:00 PM

raueda1

-Dave
Now:  1976 6.9 Euro, 2015 GL550
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

daantjie

I have the Programa unit and it's less than stellar to be honest. It hunts a lot so I never use it.  Apparently the performance improves as it warms up but it really is so unpleasant with the constant surging that I can't be bothered to use it ;D
Daniel
1977 450 SEL 6.9 - Astralsilber

raueda1

Oh boy, thanks Daniel.  You just saved me some $$$.  I'm kind of wondering if it's really possible to have a workable cruise control in these cars.  Seems like there are just so many things that can mess them up.  Cheers,
-Dave
Now:  1976 6.9 Euro, 2015 GL550
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

ptashek

#3
If you feel like some DIY and don't mind living dangerously, you could adapt my project for the W124 to the W116. The output stage is entirely different (vacuum valve vs. servo with position feedback), but the operating principle is pretty much the same and it's all done in software anyway. I have a plan to make a W116 version of it at some point in the future. Knowing me, possibly when my own amp fails (again).

https://github.com/ptashek/mb/tree/master/CruiseControl_W124
1993 "Pearl Blue" W124 280TE
1988 "Arctic White" W124 200T
1979 "Icon Gold" W116 450SE

CA116

My cruise control was not holding speed (the accelerate function worked but that was all). I was hoping all mechanical aspects were fine and that it was just the control unit that was failing, and so far it seems I got lucky. Just a couple days ago I replaced my control unit with a rebuilt unit from Beckman Technologies (Part #001 545 21 32). Upon removing the failed unit, I found stickers on it that indicate it was rebuilt by ProgRama in 2003. So far I have only completed one highway test ride with the rebuilt Beckman Technologies unit, but the various functions performed flawlessly. Time will tell, I suppose!

It was an easy swap. Note that when removing the unit from a vehicle with an automatic transmission vehicle, loosen the holder/bracket via the single 10mm nut/bolt before attempting to remove the unit itself via its two Phillips sheet metal screws as they are not accessible otherwise.
1980 300SD | 684H Pastel Beige | 204 Bamboo

SteveDuNord

Quote from: ptashek on 22 September 2022, 02:12 PMIf you feel like some DIY and don't mind living dangerously, you could adapt my project for the W124 to the W116. The output stage is entirely different (vacuum valve vs. servo with position feedback), but the operating principle is pretty much the same and it's all done in software anyway. I have a plan to make a W116 version of it at some point in the future. Knowing me, possibly when my own amp fails (again).

https://github.com/ptashek/mb/tree/master/CruiseControl_W124

Blimey. That looks a bit complicated - kudos!

I've only just started using cruise control (on another car). It's the first time I've tried it on any car. Always considered it demonic - was actually good fun.
Wish I had it on the w116. 
'77 280se

sutekh

Quote from: ptashek on 22 September 2022, 02:12 PMIf you feel like some DIY and don't mind living dangerously, you could adapt my project for the W124 to the W116. The output stage is entirely different (vacuum valve vs. servo with position feedback), but the operating principle is pretty much the same and it's all done in software anyway. I have a plan to make a W116 version of it at some point in the future. Knowing me, possibly when my own amp fails (again).

https://github.com/ptashek/mb/tree/master/CruiseControl_W124

I love this! I'm selfishly hoping your amp fails sooner vs. later :)