retrofitting Cruise on a W124

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Sp!ke

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My local MB dealer just giggled when I asked about the required parts to do the job, with no offer of a parts breakdown whatsoever.

On some Vw's its as simple as replacing the indicator stalk and reprogramming the chip! Does *anyone*know whats involved on 124's?
 
cheapest way is - get a aftermarket Cruise control kit and get a MB control stick <img src="http://www.mbclub.co.uk/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=';)'>
 
You need a completely different ECU for cruise, also2 wiring looms and the stalk, thats about it, and maybe a few vafrious clips... <img src="http://www.mbclub.co.uk/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>
 
Different ECU huh!  They cant be reprogrammed at all - no?

ECU's are *EXPENSIVE*.  What do you recon, not much change from £500 for the ECU?

As for the rest, if its only a bit of cabling and a stalk then that bit [shouldnt] be too bad.
 
The cruise ECU is technically an ECU but is more of a relay, and not that expensive i shouldnt think, main engine ECU's are Flappin expensive but not all of the ecu's are... <img src="http://www.mbclub.co.uk/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>
 
So why did my question have the parts guy and a couple of mechanics weeping with laughter at my request I wonder.

Perhaps it was some kind of defence mechanism due to the fact they didnt know the answer.

Personally I still cant get my head round how it would work.

I guess there must be sensors linked to the breaks, and to the the speedo, and some kind of variable resistor linked to the accelerator and a switch which would allow you to dial in the speed steeing you require and to control them all, obviously some kind of preprogrammed black box . Easy if everything is drive by wire I suppose but apparently the 124's arn't (according to the stealership).

Can anyone provide a more scientific description of whats involved?
 
</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">So why did my question have the parts guy and a couple of mechanics weeping with laughter at my request I wonder.

Perhaps it was some kind of defence mechanism due to the fact they didnt know the answer.</td></tr></table><span id='postcolor'>

I think you have hit the nail on the head.

You were probably talking to people who only know how to replace an old part with new as long as they have the manual to them how.

Your question would involve a greater knowledge and understanding.

Geez, you don't think you pay £80 per hour at Mercedes to get that do you LOL  <img src="http://www.mbclub.co.uk/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>   <img src="http://www.mbclub.co.uk/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>
 
Apologies for rehashing an old thread but...
Has any one actually completed this task of retrofitting cruise control to a W124, in particular an E320???
Our's, obviously, doesn't have it and I think it might be a useful addition to the vehicle, particularly when towing the caravan!!!
 
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Using MB parts you will need a Throttle Actuator WITH cruise control.
One of these units WITHOUT cruise is £507.82p Don't know how much more the 'WITH cruise' unit costs.
 

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