John:

I don't think you'll be wanting to put an 8V seat into your 16V. I used to have a 1984 190E 2.3-8V with FULL compliment of AMG enhancements. Those stock seats couldn't hold my butt in place if I had myself "glued" in place. I therefore, installed a set of Recaro seats -- that did the trick. Your best bet is to either: (a) find a set of replacement 16V seats (ALL 16V models came with black interior; '86 & '87), or (b) purchase a set of Recaros.

Good luck!

Brian