See also:

Call volume
Call volume can be only be adjusted during a call. Use the buttons in the steering wheel keypad or the infotainment system’s VOL control. ...

Instrument overview
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Stowing the two-stage integrated booster cushion
The booster cushion can be folded down completely (stowed) from either the stage 1 or stage 2 positions. NOTE The booster cushion cannot be moved from the stage 2 (upper) position to the sta ...