Campers, boats, horse trailers, bikes... whatever you are towing, the GL-Class was designed with pulling a trailer in mind. Take full advantage of its 7,500-lb towing capacity with an optional factory-installed trailer hitch. The hitch option includes the wiring harnesses for the trailer lights and brakes, while every GL-Class is already equipped to handle the rigors of towing on the engine, cooling system and transmission. Standard Trailer Stability Assist helps keep trailer sway under control.