Mercedes-Benz M-Class 2012 Owners Manual - Manual (Page 336)

X Prepare the vehicle as described
(
Y
page 329).
X
If a trailer is coupled to the vehicle,
uncouple it.
X Remove the following items (depending on
the vehicle's equipment) from the stowage
well under the trunk floor:
R the emergency spare wheel 26
R the lug wrench
R the folding wheel chock
R the jack
R the ratchet wrench
R the alignment bolt
X Secure the vehicle to prevent it from rolling
away.
Securing the vehicle to prevent it from
rolling away
G WARNING
Only jack up the vehicle on level ground or on
slight inclines/declines. The vehicle could
otherwise fall off the jack and injure you or
others.
If your vehicle is equipped with a wheel chock,
it can be found in the vehicle tool kit
(
Y
page 328).
The folding wheel chock is an additional
securing measure to prevent the vehicle from
rolling away, for example when changing a
wheel.
X Fold both plates upwards :.
X Fold out lower plate ;.
X Guide the lugs on the lower plate fully into
the openings in base plate =.
Securing the vehicle on level ground
X
On level ground: place chocks or other
suitable items under the front and rear of
the wheel that is diagonally opposite the
wheel you wish to change.
Securing the vehicle on slight downhill gradients
X On downhill gradients: place chocks or
other suitable items in front of the wheels
of the front and rear axle.
Raising the vehicle
G WARNING
When jacking up the vehicle, only use the jack
which has been specifically approved by
Mercedes-Benz for your vehicle.
The jack is designed exclusively for jacking up
the vehicle at the jacking points built into both
26 Vehicles with an emergency spare wheel.
334
Flat tire
Breakdown
assistance