On pages 400-401 of the 2018 Subaru Ascent Owners Manual it states: NEVER exceed 45 mph when towing a trailer uphill on a hot days. On page 402 it states that the engine and transmission are relatively prone to overheating when towing uphill on hot days. I live in Northern Arizona and most of my trailer towing is in the summer and requires much uphill driving. Driving 45 mph is going to create issues with the flow of traffic. Just thought prospective owners wanting to tow might want to study the owners manual first before towing. Warranty will be void if the car is damaged due to towing. Again this is in the online owners manual at techinfo.subaru.com. It also says "Do not use a weight distributing hitch" on page 391. It takes two people to park the Ascent with trailer on a steep hill as the electronic parking brake is not strong enough to hold the car and trailer. How would a solo driver handle this without having a run away rig? I am having second thoughts on trailer towing with this new information. FYI