Aston Martin DB11 Owner's Handbook Manual page 59

Warning: No modifications or additions should be made
by the user which will either prevent seat belt adjusting
devices from operating, or prevent seat belt assembly from
being adjusted to remove slack. Never install accessories on
your seat belts.
Warning: Seat belts should be adjusted as firmly as
possible, consistent with comfort, to provide the protection
for which they have been designed. A slack belt will greatly
reduce the protection afforded to the wearer.
Warning: It is essential to replace the entire seat belt
assembly after it has been worn in a severe impact even if
damage to the seat belt assembly is not obvious.
Warning: If it is necessary to replace a seat belt on this
vehicle then it MUST be replaced with an approved seat belt.
The approved seat belts for the front seats must also include
a load limiting system.
Pre-tensioner and Load Limiting
Front seat belts are equipped with dual pre-tensioners and load
limiting systems.
In most moderate frontal or near frontal accidents, the front
airbag and all pre-tensioner systems will deploy simultaneously.
The pre-tensioners take up slack in the seat belts as the airbags
are expanding. The load limiting system releases belt webbing in
a controlled manner to reduce belt force on a passenger's chest.
In some moderate frontal or near frontal accidents, only the
pre-tensioner system will deploy.
Seat Belt Reminder
The seat belt reminder warning symbol in the instrument
cluster will come ON and warning sound will be heard for
six seconds (approximately) when the ignition is set to ON if the
driver or passenger seat belt is not fastened. (Market
1
dependent.)
If the driver seat belt is not fastened after 60 seconds or if the
vehicle has reached a speed of 25 km/h, a warning sound will be
heard for 30 seconds, after which the warning sound will go off,
but the warning symbol will continue to show until the seat belt
is fastened.
If a passenger is sitting in the front passenger seat.
1.
3.13
Before Driving