Gear shift indicator
The concept
The system recommends the most fuel efficient gear in the current driving situation.
Displays
Indicators to shift up or down are displayed in the instrument cluster.

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 ...
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