Engine Compartment - Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual

Frequent operation in mountainous terrain or
R
on poor road surfaces
When the engine is often left idling for long
R
periods
Operation in particularly dusty conditions
R
and/or if air-recirculation mode is frequently
used
In these or similar operating conditions, have the
interior air filter, air filter, engine oil and oil filter,
for example, changed more frequently. The tyres
must be checked more frequently if the vehicle is
operated under increased loads. Further informa-
tion can be obtained at a qualified specialist work-
shop.
Battery disconnection periods
The ASSYST PLUS service interval display can cal-
culate the service due date only when the battery
is connected.
Display the service due date on the driver dis-
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play and note it down before disconnecting
the battery ( page 358).
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Engine compartment

Active bonnet (pedestrian protection)
▌Operation of the active bonnet (pedestrian pro-
tection)
In certain accident situations, the actuation of the
active bonnet reduces the risk of injury to pedes-
trians. The rear area of the bonnet is raised by
approximately 80 mm.
After being triggered, the active bonnet remains in
the raised position. Limited visibility due to the
raised bonnet cannot be ruled out.
After the active bonnet has been actuated, pedes-
trian protection may be limited.
Have the full functionality of the active bonnet
restored immediately in a qualified specialist
workshop.
If necessary, adjust your seat position and drive
carefully to a qualified specialist workshop. If a
safe continued journey is not possible, contact a
qualified specialist workshop.
P223 0288 02
Maintenance and care 359
Opening and closing the bonnet
& WARNING Risk of accident due to driving
with the bonnet unlocked
The bonnet may open and block your view.
Never release the bonnet when driving.
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Before every trip, ensure that the engine
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bonnet is locked.
& WARNING Risk of accident and injury
when opening and closing the bonnet
The bonnet may suddenly drop into the end
position.
There is a risk of injury for anyone in the
engine bonnet's range of movement.
Do not open or close the bonnet if there
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is a person in the bonnet's range of
movement.