Aston Martin DB11 Owner's Handbook Manual page 71

ALR Operation
Gently pull out the seat belt until fully extended. The ALR system
will only engage at the maximum extension point of the seat belt.
Thread the belt tongue through the child seat as per the child seat
manufacturer instructions. Engage the tongue into the belt
buckle.
Adjust the tongue position on the belt to make sure that the lower
belt run is tight and then allow the upper run of the seat belt to
fully retract until the child seat is securely held. The ALR system
will be heard 'clicking' as the seat belt retracts.
When fully retracted, pull down on the upper run of the belt to
check that the ALR lock has engaged.
When parked on an incline, the seat belt may lock as it is
withdrawn. This is not a fault. If the mechanism locks, release the
seat belt tension and then pull the seat belt very gently to avoid
operation of the inertia lock.
The ALR system will disengage when the seat belt is fully
retracted. The seat belt may then be worn when required as a
normal seat belt. Once the ALR is disengaged, the seat belt must
be fully extended to re-engage the system on the next occasion
that a child seat is installed.
Front Passenger Seat Installation
To install a child seat to the front seat using the seat belt, use the
procedure that follows:
1. Move the passenger seat to its fully rearward and highest
position. Lower the front of the seat cushion to its lowest
position.
2. Recline the back of the seat as necessary.
3. Follow the child seat manufacturers instructions and install
the child seat into the passenger seat.
4. Raise the seat back until the child seat is supported by the
back of the passenger seat.
Warning: If the Occupant Classification System (OCS)
does not set the passenger airbag to OFF, the passenger
airbag will be active. Never use a child seat in the front
passenger seat with the passenger airbag active.
5. Confirm the OCS has set the passenger airbag to OFF (Refer
to 'Occupant Classification System', page 3.20).
If stays ON even after this, install the child seat to a
rear seat (if possible).
6. Install the top tether to secure the child seat.
3.25
Before Driving