If they are both 220cdi engines it might be just down to the ECU, as is the case with most mercedes diesel 'engine variations'. But dont take my suggestion seriously, i'm not 100% sure in this particular case, unless the 143bhp version you speak about is a W202 also and not a W203.
If they are both 220cdi engines it might be just down to the ECU, as is the case with most mercedes diesel 'engine variations'. But dont take my suggestion seriously, i'm not 100% sure in this particular case, unless the 143bhp version you speak about is a W202 also and not a W203.