[W124] Troubleshooting cruise-control

[Steve Nervig]

Besides Frank's excellent advise, I would suggest that you make sure  
that all of your accelerator linkage joints and sliders are free from  
dirt/grim and freshly lubed with ATF (shown in maintenance job 3022,  
and service job 30-0010).

The cruise control is covered under section 30-5XX, with  
troubleshooting in 30-502 and wiring diagrams in 30-580.

Steve


On May 5, 2007, at 11:56 AM, rlcola1 at aol.com wrote:


> thanks Frank  I'll try to do it.

>

>

> -----Original Message-----

> From: Frank.Smyth at microsoft.com

> To: w124list at mbcoupes.com

> Sent: Fri, 4 May 2007 1:56 PM

> Subject: Re: [W124] Troubleshooting cruise-control

>

> Hi Rich,

>

> First check the actuator-lever is set properly:

> - ie. check that the actuator lever rests against the idle-stop of  

> the CC

> - to do this, disconnect the pull-rod (has a little ball socket on  

> the end)

> - press the lever clockwise against the idle-stop

> - reconnect the lever to the pull-rod

> - the actuator lever must be lifted approx. 1mm from the idle-stop

> - if not, adjust the rod - prise off the socket, loosen the lock- 

> nut, screw

> socket in or out, tighten lock-nut

>

> Symptoms: "jerking" over approx 60 kph with cruise-control switched on

> Test relay:

> - remove the CC relay

> - connect terminals 2 & 3 in the relay's socket with a test lead  

> and run the car

> with CC enabled

> - If the problem is no longer apparent, replace the relay

> - If the problem still persists, trace the wiring for the relay

>

> Paraphrased from this book, The Mercedes W124 Owners Wokshop Manual by

> Technibooks/Motorbooks which I really recommend. http://tinyurl.com/ 

> ytbpuc Much

> better than the Haynes manual. However the wiring diagrams in both  

> books don't

> show the cruise-control !!

>

> Hope that helps

>

> Frank

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