See also:

Adjusting the volume
Turn the volume button while giving an instruction until the desired volume is set. ▷ The volume remains constant even if the volume of other audio sources is changed. ▷ The volume i ...

Updating the navigation data
General information Navigation data are stored in the vehicle and can be updated. Navigation data and authorization codes are available from your service center. ▷ Depending on the data v ...

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 ...