Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 399

if altering the load on the vehicle
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prior to long journeys
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if the operating conditions change, for
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example when driving off-road
Adjust the tyre pressure where neces-
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sary.
Tyre pressure which is too high or too low can:
Shorten the service life of the tyres.
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Cause increased tyre damage.
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Adversely affect driving characteristics and
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thus driving safety, e.g. due to aquaplaning.
& WARNING Risk of accident due to repea-
ted pressure drop in the tyres
The wheels, valves or tyres could be damaged.
Too low a tyre pressure can lead to the tyres
bursting.
Examine the tyres for foreign objects.
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Check whether the tyre has a puncture
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or the valve has a leak.
If you are unable to rectify the damage,
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contact a qualified specialist workshop.
Information on the recommended tyre pressure
for the vehicle's factory-fitted tyres can be found
on the tyre pressure table on the inside of the fuel
filler flap ( page 397).
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Use a suitable pressure gauge to check the tyre
pressure. The outer appearance of a tyre does not
permit any reliable conclusion about the tyre pres-
sure.
Only correct tyre pressures when the tyres are
cold. Conditions for cold tyres:
The vehicle has been parked with the tyres out
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of direct sunlight for at least three hours.
The vehicle has travelled less than 1.6 km.
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The vehicle's tyres heat up when driving. As the
temperature of the tyres increases, so too does
the tyre pressure.
Vehicles with tyre pressure monitoring systems:
you can also see the tyre pressure in the driver's
display.
P223 0288 02
Wheels and tyres 397
Notes on trailer operation
Always inflate the rear axle tyres to the recom-
mended tyre pressures on the tyre pressure table
for increased load.
Tyre pressure table
The tyre pressure table is on the inside of the fuel
filler flap.