im another guy jumping on the "preserve my ankles" bandwagon.
I had a proper receiver hitch on an old 240, basically just a flat piece of 1/4 inch steel sandwiched between the bumper and the body, and a receiver from I believe a nissan truck cut up and welded to it. Similar to smiffy6flour's setup
Sold it with the car, but was sufficient to pull a tow dolly with a rabbit on it behind my 240 with no ill effects.
I intend to make up another one at one point, class 2 should be plenty for my needs from a sedan. I definitely am not a fan of the euro hitch of the class 1 options for the sedan, I have drawn blood on those before, always when carrying something.