We have a '17 Thor Four Winds on a Sprinter chassis. Since this is a fairly tall C-class, it "falls" a bit in corners or over bumps. Enough to make my wife nervous as she followed me in the car one day. I ordered them and had them installed at a van shop when I had them for a different reason. As I pulled out of the parking lot, I immediately felt the difference! The camper had a much more on-road feel and was a pleasure to drive. My knuckles don't turn white when I see a big truck approaching from the oncoming lane. I plan on getting the front ones but they really help hold everything together. They should be part of the standard equipment!