One of my favorite cars is the Mercedes-Benz S-Class.  Are you a fan of Mercedes or of some other brand?
Mercedes are nice, wish i could afford one
Tell me about it!  I said they were my favorite car; not one I could afford - lol.  The one I admire most of all is the 1972 model - the first of its design!  Do you have a favorite model?
i know there is a Mercedes AMG race car i would like to have one it there is a AMG road car of 
Absolutely.  The AMG is headquartered in Germany.  It was originally independent, but in 1999, Benz held controlling interest.  Since 2005, they now totally own that brand line.
you know come think of it I do remember  the AMG brand and cars before, but seem like they were not prevalent
Yes.  Those AMG models have generally looked more "aggressive" than the standard Benz (obviously).  With that, it comes with high-performance, better handling, better stability ... in other words, just plain AWESOME!