Mercedes-Benz 2015 M-Class Operator's Manual page 428

Changing a wheel
426
Do not use wooden blocks or similar
R
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
R
underside of the tires and the ground does
not exceed 1.2 in (3 cm).
Do not place your hands or feet under the
R
raised vehicle.
Do not lie under the vehicle.
R
Do not start the engine when the vehicle is
R
raised.
Never open or close a door or the tailgate
R
when the vehicle is raised.
Make sure that no persons are present in
R
the vehicle when the vehicle is raised.
Using lug wrench :, loosen the bolts on
X
the wheel you wish to change by about one
full turn. Do not unscrew the bolts com-
pletely.
The jacking points are located just behind the
front wheel housings and just in front of the
rear wheel housings (arrows).
Take the ratchet wrench out of the vehicle
X
tool kit and place it on the hexagon nut of
the jack so that the letters AUF are visible.
Jacking point
;
Jack
=
Crank
?
Position jack = at jacking point ;.
X
The alignment bolt on the jack must be
inserted into the intended opening on the
jacking point.
Example
Make sure the foot of the jack is directly
X
beneath the jacking point.
Turn ratchet wrench ? until jack = sits
X
completely on jacking point ; and the
base of the jack lies evenly on the ground.
Turn ratchet wrench ? until the tire is
X
raised a maximum of 1.2 in (3 cm) from the
ground.