Mercedes-Benz GLS 2020 Operator's Manual page 491

Adapt your driving style accordingly and
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drive carefully.
Never mount more than one emergency
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spare wheel or spare wheel that differs
in size.
Only use an emergency spare wheel or
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spare wheel of a different size briefly.
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Do not switch off ESP .
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>Have the emergency spare wheel or
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spare wheel of a different size replaced
at the nearest qualified specialist work‐
shop. The new wheel must have the
correct dimensions.
Check the tire pressure of the emergency spare
wheel installed. Correct the pressure as neces‐
sary.
The maximum permissible speed with an emer‐
gency spare wheel installed is 50 mph
(80 km/h).
Do not install the emergency spare wheel with
snow chains.
Replace the emergency spare wheel after six
years at the latest, regardless of wear.
% Vehicles with a tire pressure loss warn‐
ing system: If an emergency spare wheel is
installed the tire pressure loss warning sys‐
tem cannot function reliably. Only restart the
system again when the emergency spare
wheel has been replaced with a new wheel.
Vehicles with a tire pressure monitoring
system: If an emergency spare wheel is
installed the tire pressure monitoring system
cannot function reliably. For a few minutes
after an emergency spare wheel is installed,
the system may still display the tire pressure
of the removed wheel. Only restart the sys‐
tem again when the emergency spare wheel
has been replaced with a new wheel.
Be sure to also observe the following further
related subjects:
Notes on tire pressure ( page 460)
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Tire and Loading Information placard
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( page 467)
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Tire pressure table ( page 461)
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Wheels and tires 489
Removing the emergency spare wheel
The emergency spare wheel is fastened in the
cargo compartment under the cargo compart‐
ment floor.
Observe the information on mounting tires
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( page 479).
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Open the tailgate.
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Open the cargo compartment floor.
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Remove the emergency spare wheel.
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Inflating the emergency spare wheel
* NOTE Overheating due to the tire infla‐
tion compressor running too long
Do not run the tire inflation compressor
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for longer than ten minutes without
interruption.
Requirements:
Comply with the manufacturer's safety notes
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on the sticker of the emergency spare wheel
and on the tire inflation compressor.