They also specified only 8 psi boost in the w123 OM617-95X with no intercooler, small holes in the pre chambers, small solid rotors instead of vented and sealed beam headlights. None of those are still present on my wagon.

I got tired of cleaning them every other day. Rotors can be changed, and we can add features so we can play music thru the Harmon Kardon system from our smart phones as well. Sometimes we improve- and that is a personal decision. YMMV.