2010 BMW M3 Owner's Manual - Page 123

Loading roof-mounted luggage rack Because roof racks raise the vehicle's center of gravity when loaded, they have a major effect on vehicle handling and steering response. You should therefore always remember not to exceed the approved roof load capacity, the approved gross vehicle weight or the axle loads when loading the rack. You can find the applicable data under Weights on page 247. 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 raising the glass roof, and that objects do not project into the opening path of the trunk lid/ tailgate. 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. 121 Online Edition for Part no. 01 41 2 603 066 - © 08/09 BMW AG Reference Mobility Communications Entertainment Navigation Driving tips Controls At a glance