I saw the Mercedes SL 65 AMG online, but I find out the same car has two different look!!! One is like normal one and it is the one which show on the AMG webside, however, when I see the F1 safey car, they say it is a Mercedes SL 65 AMG but it looks different! if i go to buy a SL 65 AMG, which one i will get if i just go to Mercedes AMG?

According to what I think, I belive that you are just confused between the facelifted version and the one that came out in 2003.. Because the one that came out in 2003 came with circular looking head lights as for the 2009 facelifted one it comes with the cls-class looking headlamps