Originally Posted by Mike Miller

OK, I give up. I am sick and tired of dealing with the tempermental thing. I am considering installing an aftermarket CC package from Rostra. Has anyone tried this on an R129? I know it is possible to hook up the OEM control stem and thus preserve the interior originality. The Rostra unit will also take the VSS (speed signal) from the car or you can put a new one on the drive shaft. The second option is not the way I want to go. Do any of you know what the speed signal frequency is (18,000ppm??) and if it is a sign wave or pulse?

I am looking forward to a reliable and trouble free CC in my near future!!!