Need Cruise Control for 1979 300D
 

We have the complete cruise hooked up but the BLUE wire. It does not work. Again we are talking about adding this cruise to a 79 300D Mercedes that did not come with factory cruise. (Grey Market car from Germany) We used the Audiovox CCS-100. Just like you said. Help please?

I installed an Audiovox cruise control system on my 85 300cd and it was the best $110 I've spent. I've replaced the factory cc amp several times, and could only get a year or so before the cruise was unreliable again.

There's a thread on here that gives EXCELLENT step by step directions to install it, and even how to use the factory switch so it looks correct. It took me the better part of a day to install it, but I really was in no hurry.

Napa used to handle this sytem, but can no longer get it. I found it from O'reilly Auto Parts for $130, Advance Auto Parts for $110, and I believe JC Whitney has the same unit as well.

The author of the instructions on this forum recommended that an additional vacuum canister be installed, however being somewhat "cheap" I didn't order one, and the system still works absolutely perfect.

The cruise on my '93 works only marginal, and I'll be installing this same Audiovox system on it. I'm not spending any more time or $$ on the factory system- not when I can by a brand new complete depandable setup for about 1/3 of what an MB rebuilt amp costs!

Good luck!
Russ

http://www.peachparts.com/shopforum/diesel-discussion/219993-official-audiovox-ccs-100-install-thread.html

You're welcome. :D

Are you sure this audiovox system will work on my 1979 300D. This car does not have cruise on it.

Yes, it is a complete kit, so if you don't already have a switch, it comes with one that you can mount on the dash. Everything else is included as well, including a speed sensor that you attach to the driveshaft, all linkage, brackets, etc.

We have the complete cruise hooked up but the BLUE wire. It does not work. Again we are talking about adding this cruise to a 79 300D Mercedes that did not come with factory cruise. (Grey Market car from Germany) We used the Audiovox CCS-100. Just like you said. Help please?

I didn't use the blue wire either, and mine works just fine.

Since your car didn't have factory cruise, I assume you used the switch that came with the kit? I believe it has a green light on it that will show when/if the power is on. Does your green light come on?

I guess a couple of things I'd check would be the brake switch (make sure it's not cancelling the cruise) and the speed sensor (make sure it's got the correct gap between the magnets and sensor).

Outside of that, just recheck every connection, make sure you have good vacuum, the linkage is hooked up to where it pulls straight, etc.

Was there a phone-help number in the Audiovox box? It seems like they do offer troubleshooting assistance.

Good Luck!
Russ