Our family of five was on a long weekend trip out of state; as we were driving through MD, our "check engine" light came on and began flashing and the engine begin to misfire. We stopped by a local dealer and they "fixed" the problem, only to have it return 30 miles later. We were able to make it to Keplinger's, where they diagnosed and fixed the problem on a Friday afternoon, saving our family weekend! Weeks later the car is still running great. Can't recommend Keplinger's highly enough!! If we lived in Hagerstown, no one else would ever service our vehicles.