You can make a nice hitch very easily, but don't ever bolt it to the bumper it was designed to compress (shocks) and tear away (slide in mounts) if needed, bolting it to solid steel will stop those things from happening. My Audi had a great design, it mounted under the studs for the bumper shocks and had a thick cross tube that was behind the rebar, a vertical 2" receiver and special hitch mount that was 90 degree. It was strong enough to tow S class's on a tow dolly. I can supply pictures to give you the right idea, but never bolt it to the light weight bumper. It would work find on a w123 once designed for the shock mounts.