My Audi A4 had a check engine light. The book listed several possible causes and some that could cause bigger problems. Dropped the car at Mohr's on a Thursday morning. The friendly, professional receptionist took my information with virtually no wait. Got a call from the service tech that afternoon with a diagnosis and suggested a few other issues that needed to be addressed. Gave me the price for each and I authorized all. The part(s) had to come from Denver, so I expected the work top take a few days, but got a call Friday afternoon that the car was ready. Great service and a reasonable price. Good to know I have a dependable shop to service an Audi right here in Montrose!