On my 95 E300 early in the summer the cruise control quit working. I swapped in a rebuilt Programa unit I had bought for another 95 that I pulled off the road due to rust. This unit was probably a couple of years old, was not used more than a year. So anyway, cruise worked fine then I started noticing while driving I could feel it dropping out then kick back in right away. Just felt like a little surge. Over the course of a few days it got worse. It then got to the point where it would drop out completely and then sudden kick back in on its own a minute or 2 later. This progressed to dropping out, then kicking back in 10 minutes later, then it just quick working all together. I figured it amp was bad again so I rebuilt the original amp with new caps and resoldered it. I installed it this past weekend and tested the car and it worked. Previously with this original unit it would not kick in at all. Today I drove the car and took it for a 2 hour drive and the cruise worked great. On the way back I started feeling the same surging/dropping out it was doing before. At one point it dropped out for about 5 minutes then kicked back in. After that it worked fine again but sometimes could feel it dropping out for a split second then kick back in. Other times it would go a long time and never do it. So basically its starting to do the same thing the rebuilt Programa unit was doing. I am starting to wonder if there is another issue. Could it be something with the actuator or the speed sensor in the speedo? Maybe its loosing power to the amp, maybe a flaky fuse. I need to check that.