Mercedes-Benz G-Class Owner's Manual page 182

Changing a wheel
180
The following must be observed when raising
the vehicle:
to raise the vehicle, only use the vehicle-
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specific jack that has been tested and
approved by Mercedes-Benz. If the jack is
used incorrectly, it could tip over while the
vehicle is raised.
the jack is designed only to raise and hold
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the vehicle for a short time while a wheel
is being changed. It is not suited for per-
forming maintenance work under the vehi-
cle.
avoid changing the wheel on uphill and
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downhill slopes.
before raising the vehicle, secure it from
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rolling away by applying the parking brake
and positioning wheel chocks. Never
release the parking brake while the vehicle
is raised.
the jack must be placed on a firm, flat and
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non-slip surface. On a loose surface, a
large, load-bearing underlay must be used.
On a slippery surface, a non-slip underlay
must be used, e.g. rubber mats.
Do not use wooden blocks or similar
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objects as a jack underlay. Otherwise, the
jack will not be able to achieve its load-
bearing capacity due to the restricted
height.
make sure that the distance between the
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underside of the tyres and the ground does
not exceed 3 cm.
never place your hands or feet under the
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raised vehicle.
never lie under the raised vehicle.
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never start the engine when the vehicle is
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raised.
never open or close a door or the tailgate
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when the vehicle is raised.
make sure that no persons are in the vehi-
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cle when the vehicle is raised.
X
Using wheel wrench :, loosen the wheel
bolts/wheel nuts on the wheel you wish to
change by about one full turn. Do not
unscrew the wheel bolts/wheel nuts com-
pletely.
Pump lever ;
X
Assemble the pump lever for the jack. It can
be found with the vehicle tool kit
( Y page 155).