See also:

Tire identification marks
Tire size 255/50 R 19 103 Y 255: nominal width in mm 50: aspect ratio in % R: radial tire code 19: rim diameter in inches 103: load rating, not for ZR tires Y: speed rating, before the R on ZR ...

Tachometer
Tachometer Never force the engine speed up into the red warning field, see arrow. In this range, the fuel supply is interrupted to protect the engine. ...

The concept
This system can be used to select a desired speed that the vehicle will maintain automatically on clear roads. To the extent possible, the system automatically adjusts the speed to a slower veh ...