I live near the Univ of Denver and haven't had to take mine to the shop. The auto repair that works on my other non-Crossfire vehicles says that when the time comes, take it to Star Tech Mercedes @ 480 S Santa Fe Dr, Denver, CO 80223 (303) 744-7021. I realize that's not Littleton and might be to far to go, so maybe call some independent shops out South and see if they work the X-fire.