The 2008 Mercedes-Benz C63 AMG has not been crash tested by the National Highway Traffic Safety Administration (NHTSA) or the Insurance Institute for Highway Safety (IIHS).
The C63 AMG does include a full complement of airbags (seven altogether) as well as belt tensioners and force limiters. BusinessWeek reports anti-lock brakes and stability control are standard. According to other sources, the stability control can be overridden by the driver who wants complete control over the vehicle.
J.D. Power also reports that the 2008 Mercedes Benz C63 AMG employs one of the most advanced accident-avoidance systems available. Called PRE-SAFE, this "preventative occupant protection system" combines several electronic safety systems to prepare the vehicle for a crash. PRE-SAFE tightens seatbelts, opens windows a bit, and readies the brakes for an emergency by using sensors to predict rapid acceleration or deceleration that typically happens prior to an accident.
Few of TheCarConnection.com's sources discuss visibility issues; Cars.com, however, says that with the number of "power seat adjustments and a tilt/telescoping steering wheel" possible in the Mercedes-Benz C63 AMG, "it's easy to find a comfortable driving position that affords good forward, side and rear visibility."