Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 196

194 Driving and parking
This jeopardises the operating and road safety
of the vehicle.
Stow all objects in the vehicle securely
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so that they cannot get into the driver's
footwell.
Always fit the floor mats securely and as
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prescribed in order to ensure that there
is always sufficient room for the pedals.
Do not use loose floor mats and do not
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place floor mats on top of one another.
& WARNING Risk of accident due to incor-
rect footwear
Incorrect footwear includes, for example:
shoes with platform soles
R
shoes with high heels
R
slippers
R
There is a risk of an accident.
Always wear suitable footwear so that
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you can operate the pedals safely.
& WARNING Risk of accident if the ignition
is switched off while driving
If you switch off the ignition while driving,
safety functions are restricted or no longer
available.
This may affect the power steering system and
the brake force boosting, for example.
You will need to use considerably more force
to steer and brake, for example.
Do not switch off the ignition while driv-
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ing.
& DANGER Risk of death caused by exhaust
gases
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases is hazardous to health
and leads to poisoning.
Never leave the engine or, if present, the
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auxiliary heating running in an enclosed
space without sufficient ventilation.
P223 0288 02
& WARNING Risk of skidding and of an acci-
dent due to shifting down on slippery road
surfaces
If you shift down on slippery road surfaces to
increase the engine braking effect, the drive
wheels may lose traction.
Do not shift down on slippery road surfa-
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ces to increase the engine braking
effect.
& DANGER Risk of fatal injury due to poison-
ous exhaust gases
If the tailpipe is blocked or sufficient ventila-
tion is not possible, poisonous exhaust gases
such as carbon monoxide may enter the vehi-
cle. This is the case when the vehicle
becomes stuck in snow, for example.
Keep the tailpipe and the area around
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the vehicle free from snow when the
engine or the stationary heater are run-
ning.