We also have the 2014 2251 SLE. From what I find, the Schwintek slide can be moved manually by removing the motors temporarily. One on each side. Check it out here:
We just returned from a month long 5100 mile trip from S. Florida to the Grand Canyon. The RV was perfect for the entire trip. We loved the trip and are about to sell the RV and move up to a little larger RV for full time living. Good luck with yours.