See also:

Adjusting the volume
Turn the knob until the desired volume is selected. The setting is stored for the remote control currently in use. ...

Switching on/off manually
Press the button. On: the LED lights up. Off: the LED goes out. If Top View is displayed, switch on the backup camera via the iDrive. ...

Checking the engine oil level
Your car is equipped with an electronic engine oil level check. Requirements ▷ The engine must be running and warm after the vehicle has been driven for at least 6.2 miles/10 km. ▷ ...