Actually your wrong. AMG can mean many things. The real AMG are S63 & S65 which are the really expensive and fast ones. i believe V12s. You might see the S550 with the AMG badge which means either it has the AMG appearance package (body kit and wheels) or just a regular S550 and someone just put a AMG badge on it. But AMG badge that you see dosent mean its a authentic AMG.