See also:

Tone
Only treble and bass can be set in the rear. The settings are made separately for the left and right headphones. Operation is the same as for the front tone. ...

Interior
The 135i's interior design is fairly traditional, with more upright shapes than sweeping contours. Dual-zone climate controls sit below the center air vents and optional navigation system, with BM ...

Switching on/off manually
Press the button. On: the LED lights up. Off: the LED goes out. The PDC is shown on the Control Display. Switch on the backup camera via the iDrive. ...