[Vwdiesel] Mercedes cruise control

[Andrew .Libby]

The amp (control unit) is notorious for failing in those due to cold solder
joints and failing electrolytic capacitors.  Before replacing the control
unit, it is wise to test ALL of the other functions and from the control
unit connector.  It is also important to open the control unit connector
and re-crimp all the little connectors and reconnecting and seeing if that
does the trick.

Do the diagnostics here:   http://gdl-online.com/test023.html

I had another diagnostic page that was better, IMO, but can't seem to find
it.

Andrew

On Fri, Dec 9, 2011 at 7:13 PM, William J Toensing <toensing at wildblue.net>wrote:

> This discussion group seems to be knowledgeable on car problems other than
> VW, especially Mercedes diesels. I have now owned my 1983 300SD for a year.
> Because of its low mileage (131,000 miles now), it has not had a lot of the
> problems that many of the other Mercedes are having such as a non-working
> odometer. However, the cruise control on my 300SD doesn't work. Any
> suggestions on how to trouble shoot the cruise control system, or is there
> one item that has likely failed? If so, can it be easily repaired or does
> it need to be replaced?
> Bill Toensing, Nevada City, CA
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