If your car doesn't have a warranty, then technically you don't have to bring it to a chrysler dealer. Some of the more experienced members here may disagree, but in your situation, I would pay more for the proper expertise. In this case, I would forego the Chrysler dealer altogether. The crossfire is essentially a mercedes in a wonderful Chyrsler based halloween costume. I would look for either a mercedes dealer ($$$$$$) or an independent shop that specializes in european cars (and is comfortable working on mercedes cars). The problem is that the Chyrsler dealer is supposed to know how to work on these cars, but in reading these forums over the months, it seems like the dealers just don't have enough practical experience with these cars to know how to properly fix them.

An oil change is probably ok at the chrysler dealer, assuming they use the proper oil. I'm sure a brake job or replacing suspension parts would also be fairly simple, but anything more complication would have me concerned about taking the vehicle to a dealer.