the torque fiqure for the C230 is a bit higher with the 100cc size increase.
And I assume emission and fuel economy may also improve.
At around the time the C230 sedan was offered the Mercedes C230SLK with a supercharger was being marketed for performance and in 1999 the C-sedan used this supercharged engine. So the 1998 normally aspirated C-230 engine was an interm engine that basically had a supercharger added to it for use for four more model years.
Why not just supercharge the C220, what can a 100cc increase in size mean?
The 100cc increase is probably the result of improvements to the engine.
Currently I wish Mercedes was selling a four cylinder non-supercharged engine in the US..