Opel 2014 Insignia Owner's Manual page 87

Storage 85
the vehicle's higher centre of
gravity. Distribute the load evenly
and secure it properly with retaining
straps. Adjust the tyre pressure and
vehicle speed according to the load
conditions. Check and retighten the
straps frequently.
Do not drive faster than 120 km/h.
The permissible roof load is
100 kg. The roof load is the
combined weight of the roof rack
and the load.