my c220 cdi coupe 2002 recently appears to be slower in general,, its not to apparent but also my wife mentioned it also,,, it appears more leisurely and is more easy to stall usually on start up from cold ,,it runs well good on fuel and the cat was removed last year,, it also cruses at 80 plus with ease put some injector cleaner in but no difference,, i would estimate its down no more than 5 per cent so no big deal ,, but any one give me any pointers???