I would highly recommend that you get a free to USA subscription to the Mercedes EPC (Electronic Parts Catalog):

EPC-net Online

This is the official Mercedes-Benz parts catalog, and has an option to look up the datacard for any VIN number (back to 1980 or so). It is an invaluable source when looking for parts and has other misc. info such as the datacards. They ask for your credit card, but this is to verify you are in the US and not for any charges.

Looked up that VIN, and it did not specifically say "Sportline" that I could find, but did say it has the AMG drivers package, sport seats, and AMG steering wheel. This sounds "sporty" to me.