AMGlover and C_P - Thanks for the quick responses about the gas tank but my dealer had already replaced the tank. When the problem continued, the dealer then replaced everything else in the system, or so I was told. That's why the dealer is stumped and wants to get an engineer involved. Of course it's possible that the replacement tank is defective.

Matt - That was most certainly my car you were told about, since I think we have the only supercharged Crossfires in SD. What actually happened with my car was that the supercharger clutch had failed. The plan was for me to continue driving it while waiting on a replacement supercharger (the clutch is integral to the supercharger so the whole assy had to be replaced). After several days of driving the supercharger pulley popped off it's shaft and did some damage grinding into some emission piping. The accessory belt also came off. I kind of suspect that the pulley was loosened during troubleshooting but Mike swore that they did not touch it. So my supercharger was replaced, not because of the pulley but because of a bad clutch. Incidentally, of all of the problems I've had with my car, this was the only one that prevented me from driving it.

As for Mike, I think he treated me very well and I was really worried about the quality of service with another manager. It's annoying to have all of the problems I've had but at least I could always count on Mike to get my car fixed. But after talking to my new service manager, Kathryn, it looks like things may even be better. She said to drop my car off at my convenience and the dealership will get the engineer in to look at it. So the dealership went from telling me that it may be up to two months to get a field engineer out to SD to telling me that they were ready for the car. Not sure what the full story is here - is there really a field engineer? Did Mike make a mistake telling me one was not available for weeks? Did someone at Rancho count the number of times I've been in and started worrying about the lemon law (going to have to have a lot more problems before I would even consider that)?

So I dropped the car off this evening and am now driving an extremely torqueless and wallowy 2007 PT Cruiser loaner. And yes, my cupholder will be replaced.