While divulging the possibly epic mistake I made, may I ask: Are/were there 2 different steering wheel horn pads for the W116. My costly zebrano steering wheel and my NOS pad seem to.. well.. not fit. :-\
There were more than two versions of the steering wheel.
See this old thread: https://forum.w116.org/interiors-and-exteriors/steering-wheel-differences/30/
One change was only related to the shaft spline size, which was larger on late cars. The pad was identical between these two (I have both in my stash).
that s what I know. Different splines, same pad.
Still. Different pads required here. I am at a loss.