Sharon Chrysler is well known for their excellent service department. They are a very small dealership that maintains a small lot and survives mainly on their service. That said, I don't know if they have any certified Crossfire mechanics. I will be finding out though, since I live about 10 blocks from the dealer.

If you want to check them out, here's the contact info:
Sharon Chrysler
923 EAST STATE ST
SHARON, PA 16146-3331
Phone: (724) 346-3548

Just in case you're not familiar with Sharon, PA, it's the first exit on I-80 East just after you cross the Penn/Ohio border. While you're in town, you can check out the original Quaker Steak and Lube.