2012 Mercedes-Benz S65 AMG CHANGELOG: Improved engine for better performance – New 9-speed gearbox to match the engine – Top speed around 360 kmph  Specifications: – Available at all dealerships – Works on 1.33, 1.34 (Haven’t tested versions below 1.33) – Lightmask Lights – Two engine options (S63 AMG & S65 AMG V12 Bi-turbo) – Real engine specifications and sound (select the V12 Bi-turbo engine for sound) – 9-speed automatic gearbox, tuned accordingly – Cabin Accessories DLC – Real speed animation – AO Render covering – High-quality interior & exterior The car is very stable even at speeds like 300kmph or more, though the steering gets tighter as the speed increases. If the car gets pushed away at ramps, then open the developer console by pressing ` and type g_suspension_stiffness 1 and hit enter. That should fix your problem