I'm trying to install a seatbelt restrained child seat, but I can't get the auto locking retraction to work. I don't think I'm doing it wrong. I extend the belt the full length and let it retract, but there's no clicking sound and the belt can be freely extended. All belts in the car behave the same way. Model 3 VIN 488xxx delivered in September at Alexandria. Manual says: To securely hold child safety seats, all passenger seating positions are equipped with an automatic locking retractor (ALR) that, by pulling the seat belt beyond the length needed for a typical adult occupant, locks the belt into place until the seat belt is unbuckled and the webbing is fully retracted. The ALR mechanism operates as a ratchet, winding in slack and preventing the seat belt from extending any further until it has been completely rewound. When installing a child safety seat, engage the belt's automatic locking retractor by pulling the seat belt webbing until it is fully extended. The ALR system engages only when the seat belt is at its maximum extension point.