I have an 06 roadster, and are having some of these problems. I also have found a garage that works on Crossfires (Aamco) I have no confidence in the Chrysler dealer. Aamco verified that the battery is most likely the source and after it is the original and 7 years old, it's time for a replacement. He also said that you cannot just take out the old one and put in a new one. There are things to be done before and after. Since I am due for a oil change too, I will see how it goes. They are going to do this Tuesday, so I will post back as to how it goes.