Mercedes-Benz GLB Owner's Manual page 529

526 Wheels and tyres
Comply with the recommended tyre
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pressure and check the tyre pressure of
all tyres including the spare wheel regu‐
larly:
at least once a month
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when the load changes
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before embarking on a longer journey
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if operating conditions change, e.g. off-
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road driving
Adjust the tyre pressure as necessary.
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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 from repea‐
ted tyre pressure drop
If the tyre pressure drops repeatedly, the
wheel, valve or tyre may be damaged.
Insufficient tyre pressure can cause the tyres
to burst.
Inspect the tyre for signs of foreign
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objects.
Check whether the wheel or valve has a
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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 526).
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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
pressure.
Vehicles with a tyre pressure monitoring sys‐
tem: you can also check the tyre pressure using
the on-board computer.
Only correct tyre pressures when the tyres are
cold. Conditions for cold tyres:
The vehicle has been parked with the tyres
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out of direct sunlight for at least three hours.
The vehicle has travelled less than 1.6 km.
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A rise in the tyre temperature of 10 °C increases
the tyre pressure by approx. 10 kPa (0.1 bar/
1.5 psi). Take this into account when checking
the tyre pressure of warm tyres.
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.