Well, I read a little info on the 2.0 and 2.2 and found 87x84 for 2000cc and 87x92.6 for 2200cc. If this is correct, the stroke difference is 8.6mm, which means a 4.3mm shorter rod for the 2200cc (all other things the same). 4.3mm constitutes 102.2 less cc. This part, I'm not sure of, but I get a ratio of 10.4:1 using the 4.3mm shorter rod with a 2000cc crank. That's too low for a diesel, so probably couldn't work. Can anyone back up my calculations? Is my info correct?

As far as shaved pistons, I don't know if you can buy new pistons for a Mercedes with less compression.