The Lane Assist and Crosswind Assist do not work properly. When a gust of wind hits you or when you're passing a semi, the van immediately forces your vehicle off the road or into the other lane where there is another vehicle or a concrete barrier. It's very difficult to hold onto the steering wheel and try to maneuver the vehicle to stay in your lane. The only way to turn off these features are to turn off them off every time you start your vehicle. Mercedes Benz has told me there is no way to turn it off completely and they have had numerous complaints of unsafe vehicle responses from the assist features.
NHTSA ODI 11421986