To change the cruising speed

See also:

Meters and gauges
NOTE Liquid crystal displays are used in some of the meters and gauges in the combination meter. You will find their indications hard to see if you wear polarized glasses. ...

Non-turbo models
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Upshift/downshift indicator (AT and CVT models)
When the manual mode is selected, the gear position indicator (which shows the current gear selection) and the upshift/ downshift indicator light up. Refer to “Automatic transmission/Continuously ...