BMW M3 Owner's Manual page 143

Entertainment
Information on connection
>
The connected audio device is supplied
with a max. power of 500 mA if supported
by the device. For this reason, do not addi-
tionally connect the device to a charging
socket in the vehicle; otherwise, it may not
be possible to ensure proper playback.
> Do not use force when plugging the con-
nector into the USB interface.
> Do not connect devices such as fans or
lamps to the USB audio interface.
>
Do not connect USB hard drives.
> Do not use the USB audio interface to
recharge external devices.
142
Professional radio
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