BMW AG Owner's Handbook Manual page 31

Opening and closing – with the remote control
If the luggage compartment lid
was locked before being opened,
it is relocked when closed.
Before and after every journey, make
sure that the luggage compartment lid
has not been opened accidentally.<
Interference
Malfunctions:
The remote control can malfunction as
a result of interference from local radio
waves.
If this happens, open and close the car
by inserting a master key in the door
lock.
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