I looked up the (2013 Edge owners manual)
http://www.fordservicecontent.com/Fo.../13edgom4e.pdf and the recreational towing instructions are the same as shown in the 2014 owners manual. My 2014 Edge is a great four down tow vehicle. Below is the recreational towing instructions from the 2013 Edge owners manual:
You can tow your all-wheel drive vehicle with all four wheels on the ground or with all four wheels off the ground using a vehicle transport trailer. Do not tow your all-wheel drive vehicle with the front wheels off the ground (by using a tow dolly) and the rear wheels on the ground. This causes damage to your all-wheel drive system. If you are using a vehicle transport trailer, follow the instruction specified by the equipment provider. If you are towing with all four wheels on the ground, see the following instructions. If you tow your vehicle with all four wheels on the ground: • Tow only in the forward direction. • Release the parking brake. • Place the transmission in position N. • Place the ignition in the accessory position. See the Starting and Stopping the Engine chapter. • Do not exceed 65 mph (105 km/h). • Start the engine and allow it to run for five minutes at the beginning of each day and every six hours thereafter. With the engine running and your foot on the brake, shift into position D and then into position R before shifting back into position N.
Question, why is your dealer questioning what Ford printed in the owners manual?