When installing and securing child restraints, it is necessary to switch the inertia coil to automatic locking mode. This will prevent the child restraint from moving dangerously in an accident. To engage the auto-lock mode, fully pull the seat belt out of the retractable reel. Then secure the child restraint with the seat belt, following the product-specific manufacturer's instructions. The seat belt will retract the child restraint and remain in the locked position.