Welcome, Your Crossfire is mechanically a 2004 Mercedes SLK320, unless it is the supercharged SRT-6. Your best bet for service and repair is an Independent Import shop that works on Mercedes. Forget about dealers because there is a lot of bad blood because of the Chrysler Mercedes merger.
The mechanical parts are rebranded Mercedes. The body and interior parts are one ff Chrysler and are mostly eBay only. Great info here:
Index of Crossfire problems and repairs - CrossfireForum - The Chrysler Crossfire and SRT6 Resource