Hi, I have a 2000 SLK 230 5 speed stick. For the last several months when I go to start, the starter will not engage ( like a bad solenoid). All other electrical works. Up until today it would eventually start. Once I put jumper cables on it and that started it but that wont work now. I've cleaned the cables and tapped on the starter and solenoid (which is in a hard place to reach). I can pop the clutch and start it on a hill. The battery is fine. Also the clutch has to be completely pressed in order to start. I'm thinking maybe it is that switch, but I don't know where that is. Is it a bad ignition switch? Any ideas?