Tesla MODEL S Operating Manual page 30

Seat Belts
dangerous to put a seat belt around a
child being carried on an occupant's lap.
Warning: Seat belts that have been worn
in a collision must be inspected or
replaced by Tesla, even if damage to the
assembly is not obvious.
Warning: Seat belts that show signs of
wear (such as fraying), or have been cut
or damaged in any way, must be replaced
by Tesla.
Warning: Avoid contaminating a seat
belt's components with any chemicals,
liquids, grit, dirt or cleaning products. If a
seat belt fails to retract or latch into the
buckle, it must be replaced immediately.
Contact Tesla.
Warning: Do not make modifications or
additions that can prevent a seat belt
mechanism from taking up slack, or that
can prevent a seat belt from being
adjusted to remove slack. A slack belt
greatly reduces occupant protection.
Warning: Do not make modifications that
can interfere with the operation of a seat
belt, or that can cause a seat belt to
become inoperable.
Warning: When seat belts are not in use,
they should be fully retracted and not
hanging loose. If a seat belt does not fully
retract, contact Tesla.
Seating and Safety Restraints 29