I was up late last night playing with the STAR system in simulation mode and then hooked it up to my stock Crossfire this morning. I was able to communicate with the car by selecting R170 SLK320. I tried to select other cars that used the same part number ECU but was not able to communicate becuase the Crossfire and R170 uses the 14 pin OBDII port to connect to the STAR system. Most Mercedes use a 38 pin connection that is located in the fuse box on the drivers side under the hood. If I cannot select cars that use my V8 ECU because it is looking for the 38 pin connection I may be dead in the water. I have sent an email to Beckmann to see if there is a way around this. I will report back on what I find.