Safety link
The faster a vehicle is moving, the less time the driver has to react to a hazard, and for other road users to react to that vehicle. A speeding vehicle requires more time and distance to stop, and is harder to control. Speed is a factor in 30 per cent of fatal crashes and 12 per cent of all crashes.
As speed increases over 100 km/h, the fatality rate of vehicle occupants goes up exponentially. For example, the chances of being killed in a vehicle traveling at 120 km/h are four times higher than at 100 km/h. When a car crashes near 200 km/h the chances of survival are minimal.
Truth of the Autobahn
Yes, the Autobahn has no speed limit, but only in designated stretches - which are dwindling.
I'd say the average speed in light traffic is around 80mph, with most drivers in decent cars doing at least 100mph.
Yes, there are fewer deaths on the autobahn, but people there drive with more awareness, they have different driving habits than North Americans.
Its a simple fact, you have less reaction time when you drive faster.