Whether gas, diesel, or battery-powered, these pickup trucks are ready to tow. See the max towing capacities for everything from compact to HD pickup trucks.
Regardless of towing capacity the X5 has a 550 lb tongue weight limit. If your TT has a rated tongue weight of 705 lbs then you're likely to be closer to 800 lbs with a weight distributing hitch and propane tanks on the tongue and whatnot. Tongue weight counts against payload capacity ...