See also:

Tire inflation pressures at max. speeds above 100 mph/160 km/h
Speeds above 100 mph/160 km/h In order to drive at maximum speeds in excess of 100 mph/160 km/h, please observe, and, if necessary, adjust tire pressures for speeds exceeding 100 mph/160 km/h ...

Distance to back of head: electrical head restraints
The head restraint is automatically repositioned when the shoulder support is adjusted. ...

Controls
Almost all functions can be operated in the same manner as they are in the front. Special features of operating the system in the rear are described here. ...