Replacing the batteries
No rechargeable batteries
Do not use rechargeable batteries, as damage may result from the substances in the batteries.

1. Remove the cover. Press on the cover, arrow 1, and push forward, arrow 2.
2. Insert batteries of the same type.
3. Close the cover.
Take the used battery to a recycling center
or to your service center.
See also:
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 ...
Adjusting the volume
Adjusting the volume
Turn the knob during an announcement.
▷ The volume remains constant even if the
volume of other audio sources is changed.
▷ The volume is stored for the remote ...
Swapping the telephone and additionaltelephone
The function of the telephone and additional telephone
can be swapped automatically.
1. "Telephone"
2. "Bluetooth® (phone)"
3. "Swap phone/addit. phone" ...
