Owner's Manual

5. To make the lap part tight, pull down on the buckle
end
of the belt as you pull up on the shoulder belt.
The lap part of the belt should be
worn low and snug on
the hips, just touching the thighs.
In a crash, this applies
force
to the strong pelvic bones. And you’d be less likely
to slide under the lap belt.
If you slid under it, the belt
would apply force at your abdomen.
This could cause
serious or even fatal injuries. The shoulder belt should
go
over the shoulder and across the chest. These parts of the
body are best able to take belt restraining forces.
The safety belt locks if there’s a sudden stop or crash.
On convertible models, the safety belt also locks
if you
pull the belt very quickly out
of the retractor.