omega48er

hi guys so i just bought my first benz, its a 09 clk 350. my question is when should i go get service i was looking at the car fax and the last service done was at 32,668 miles on 07/19/2011. the car is currently at 27,022 miles and i purchased it yesterday. also how much am i looking at for service cost? should i go to a MB Service center or a Indi?

thank you guys for all your help

omega48er

also should i go get extended warranty ? i believe the car still has a few months left on its factory warranty ?