So I'm almost 100% positive that I have an aftermarket cruise control system in my 97 Golf K2. Nothing about it looks stock and I'm having a hard time finding information about it. My CC "works" but tends to fluctuate about 5 MPH up or down from where it's set. My question is does anyone on this forum have an aftermarket CC system or can anyone at least show or tell me how this system is hooked in to the vehicle? I think it might be a vacuum issue but I'm not sure how to diagnose it.