If automatic radio tuning is set it can be tuned in normal view and in the station list.
Radio tuning in normal view
Short press - FM mode on 
/ 
on the centre console (or steering wheel keypad).
/ on the centre console (or steering wheel keypad).Radio switches to previous/next stored station.
Long press - FM mode on / on the centre console (or steering wheel keypad).
/ on the centre console (or steering wheel keypad).Radio switches to previous/next available station.
Radio tuning in the station list
Turn on FM mode in TUNE, FM station list is shown.
Turn TUNE to a station and select using OK/MENU.
Switch between automatic and manual radio tuning in the station list by pressing INFO in the centre console.