I'm not 100% convinced that the pic of the turbo M100 is from this car, since I can't identify any key chassis components in the pic. I can confirm that the engine was a 6,8 with a listed bore of 107mm, stroke of 95mm and capacity of 6834cm3. Oh and I managed to find some more clarity (!) with a better pic of the engine fitted in the SLC prototype. Definitely NOT a SL, a 5,0L or even a M117. It clearly shows a M100 V1, likely to be the original 6,8 and probably sourced from the killed-off-by-regs W109 campaign! Apparently 550hp.