BMW 328i xDrive Owner's Manual page 145

Driving tips Things to remember when driving
The roof load must be distributed uniformly and
should not be too large in area. Heavy items
should always be placed at the bottom. Be sure
that adequate clearance is maintained for tilting
the glass roof, and that objects do not project
into the opening path of the trunk lid.
Fasten roof-mounted cargo correctly and
securely to prevent it from shifting or falling off
during the trip.
Drive smoothly. Avoid sudden acceleration and
braking maneuvers. Take corners gently.
144
Online Edition for Part no. 01 40 2 609 333 - © 08/11 BMW AG