And yet, the Golf is rated for up to 2,000kg in the UK (a select few Diesel models), and a 1,200-1,600kg range is typical for many other editions of that model. That's for a trailer with its own brakes, of course. When I had a trailer with electric brakes, I could stop the whole rig with just the brake controller. I towed that trailer with an S10 Blazer, which had a wheelbase only 4 inches longer than the Golf. The trick was to load it with enough tongue weight that stability was not a problem, rather than relying on a hefty vehicle to overcome sway. I never had a problem with transmission temperatures when keeping the trailer weight under the rated capacity of the vehicle, but an aftermarket oil cooler can always be fitted.