Chips is right , the 2.6 190E was a 6 cylinder petrol 166bhp. The Sportline wasn't a special edition , it was an option package available to all 190's , the 502 special models built were the Evolution 2 190E 2.5ltr 16v petrol with 235 bhp.
honestly , wouldn't you think Autocar would get their information correct tut tut.... !!
But then again , is anyone really bothered ?? !! and yes , the Merc boffins must have been stuck for something to do !!
Although I will say one thing , the Mercedes Benz 190 at the time held a lot more status than the current C Class could ever wish to have.........