Welcome to the world of Crossfire service. Some of the Chrysler dealers don't have a clue & some of the Benz dealers turn up their noses at you.
If you can, keep trying other dealers. There are a few who are human & will treat you well.
Hey, hold it.....a liability thing?! What liability? The mechanic just didn't want to be bothered by your -sniff- domestic vehicle.
Pathetic.........