Mercedes-Benz GLB 2023 Operator's Manual page 302

300 Breakdown assistance
overhead control panel in the case of a break-
down ( page 262).
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All vehicles: change the wheel (
/
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The emergency spare wheel is only available
in certain countries.
Notes on MOExtended tires (run-flat tires)
& WARNING Risk of accident when driving in
limp-home mode
When driving in emergency mode the handling
characteristics are impaired.
Do not exceed the specified maximum
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speed of the MOExtended tires.
Avoid any abrupt steering and driving
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maneuvers as well as driving over obsta-
cles (curbs, pot holes, off-road). This
applies, in particular, to a loaded vehicle.
Stop driving in the emergency mode if
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you notice:
Banging noise
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Vehicle vibration
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Smoke which smells like rubber
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page 342).
Continuous ESP
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Cracks in the tire side walls
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After driving in emergency mode, have
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the rims checked by a qualified specialist
workshop with regard to their further
use.
The defective tire must be replaced in
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every case.
With MOExtended tires (run-flat tires), you can
continue to drive your vehicle even if there is a
total loss of pressure in one or more tires. How-
ever, the tire affected must not show any clearly
visible damage.
You can recognize MOExtended tires by the
MOExtended marking which appears on the side
wall of the tire.
Vehicles with tire pressure loss warning system:
MOExtended tires may only be used in conjunc-
tion with an activated tire pressure loss warning
system.
Vehicles with tire pressure monitoring system:
MOExtended tires may only be used in conjunc-
tion with an activated tire pressure monitoring
®
intervention system.
If a pressure loss warning message appears in the
driver's display, proceed as follows:
Check the tire for damage.
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If driving on, observe the following notes.
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Driving distance possible in emergency mode
after the pressure loss warning:
Load condition
Partially laden
Fully laden
The driving distance possible in emergency mode
may vary depending on the driving style. Observe
the maximum permissible speed of 50 mph
(80 km/h).
If a tire has gone flat and cannot be replaced with
an MOExtended tire, you can use a standard tire
as a temporary measure.
Driving distance possi-
ble in emergency mode
50 miles (80 km)
19 miles (30 km)