Aston Martin DB11 Owner's Handbook Manual page 212

Engine Oil Level Sensing
Caution: The electronic engine oil level sensing system
does not replace the need for the owner to regularly check
the engine oil using the dipstick. Check the engine oil level
every fourth fuel tank fill or weekly - which ever is the
soonest.
This vehicle has an electronic engine Oil Level Sensing (OLS)
system which records the engine oil level every vehicle start if the
vehicle has been left for 4 or more hours, if the vehicle is on level
ground, and if it is within a pre-set oil temperature range.
Caution: Running the engine with engine oil below the
minimum mark on the dipstick can cause serious engine
damage.
The system may not record an oil level if the engine oil
temperature is low.
For the correct engine oil (Refer to 'Fluid Specifications', page
12.11).
If the engine oil level is approaching the minimum mark the
message OIL LEVEL WARNING CHECK AND TOP UP will show
in the message centre along with an amber warning triangle and
a chime sound. A code will also be stored in the engine
management system. The engine oil level is low and should be
checked and filled to the required level engine oil as soon as
possible. The message will clear when the oil level is filled with a
least 1 litre to the required level and the OLS system has
performed a valid check of the oil level.
12.10
Maintenance and Technical Data
Engine Coolant Level
Warning: Do not remove the filler cap until the coolant
system has cooled. Scalding can be caused by escaping steam
or coolant.
Use a cloth or glove to protect hands and protect face and
arms adequately.
1. Remove the reservoir cap to check the coolant level. The
correct coolant level is to the top of the reservoir tank.
2. Make sure that the reservoir cap is secure after topping up.
Caution: Do not over tighten the reservoir cap. This can
cause damage to the reservoir cap or the thread for the
reservoir tank.