jack points MERCEDES-BENZ R-Class 2012 W251 Owner's Manual

XTurn retaining screw : counter-clockwise
and out of tool holder = and remove it.
i
If retaining screw : does not come out
immediately, turn tool holder = slightly
counter-clockwise.
Retaining screw : can then be unscrewed
with ease.
XTurn tool holder = approximately 180°, so
that the tire inflation compressor points
backwards.XRemove tool holder = from collapsible
spare wheel ;.XRemove collapsible spare wheel ; from
the emergency spare wheel well.
For further information on changing a wheel
and mounting the spare wheel, see
( Y page 299).
Stowing a used collapsible spare wheel
Take the following steps to stow a used
collapsible spare wheel. It will otherwise not
fit in the spare wheel well. Mercedes-Benz
recommends that you have this work carried
out at a qualified specialist workshop, e.g. an
authorized Mercedes-Benz Center.
! Only place the collapsible spare wheel in
the vehicle when it is dry. Otherwise,
moisture may get into the vehicle.
XUnscrew the valve cap from the valve.XIf possible, unscrew the valve insert from
the valve and release the air.
i Fully deflating the tire can take a few
minutes.
XScrew the valve insert back into the valve.XScrew the valve cap back on.
In the spare wheel well, there are two
guides : to keep the collapsible spare wheel
in place.
XLay collapsible spare wheel ; in the
emergency spare wheel well.
i Make sure that collapsible spare
wheel ; is positioned on guides :
precisely.
XLay the tool holder in collapsible spare
wheel ; so that the electric air pump is
pointing towards the tailgate (Y page 296).XTurn the tool holder approximately 180°,
so that the electric air pump points
forwards.
The tool holder should now be positioned
in accordance with the instructions on the
installation position.XTurn the retainer screw on the collapsible
spare wheel clockwise into the tool holder
as far as it will go.XStow the jack in the vehicle tool kit.298Where will I find...?Breakdown assistance

Securing the vehicle on level ground
XOn 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
XOn downhill gradients: place chocks or
other suitable items in front of the wheels
of the front and rear axle.
Raising the vehicle
GWARNING
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
sides of the vehicle. The jack saddle must be
placed centrally under the jacking point. The
jack must always be vertical when in use,
especially on inclines or declines.
The jack is intended only for lifting the vehicle
briefly for wheel changes. It is not suited for
performing maintenance work under the
vehicle. To help avoid personal injury, use the
jack only to lift the vehicle during a wheel
change.
Never get beneath the vehicle while it is
supported by the jack. Keep hands and feet
away from the area under the lifted vehicle.
Always lower the vehicle onto sufficient
capacity jackstands before working under the
vehicle.
Always firmly engage the parking brake and
block the wheels with wheel chocks or other
sizable objects before raising the vehicle with
the jack. Do not disengage the parking brake
while the vehicle is raised.
Make sure that the ground on which the
vehicle is standing and where you place the
jack is solid, level and not slippery. If
necessary, use a large underlay. On slippery
surfaces, such as tiled floors, you should use
a non-slip underlay, for example a rubber mat.
Do not use wooden blocks or similar objects
as a jack underlay. Otherwise, the jack may
not be able to achieve its load-bearing
capacity if it is not at its full height.
Never start the engine when the vehicle is
raised.
Also observe the notes on the jack.XUsing lug wrench :, loosen the bolts on
the wheel you wish to change by about one
full turn. Do not unscrew the bolts
completely.
The jacking points for the jack are located
behind the wheel housings of the front wheels
Flat tire305Breakdown assistanceZ

and in front of the wheel housings of the rear
wheels (arrows).GWARNING
The jack is designed exclusively for jacking up
the vehicle at the jacking points. The jack
saddle must be placed centrally under the
jacking point.
If you do not position the jack correctly in the
jacking point, the vehicle can fall off the jack
and seriously or fatally injure you or others.
! The jack is designed exclusively for
jacking up the vehicle at the jacking points.
Otherwise, your vehicle could be damaged.
XTake ratchet wrench out of the vehicle tool
kit and place it on the hexagon nut of the
jack so that the letters AUF are visible.XPosition jack = at jacking point ;.XMake sure that the base of the jack is
positioned directly under the jacking point.XTurn ratchet wrench ? until jack = sits
completely on jacking point ; and the
base of the jack lies evenly on the ground.XTurn ratchet wrench ? until the tire is
raised a maximum of 1.2 inches (3 cm) off
the ground.
Removing a wheel
XUnscrew the uppermost wheel bolt
completely.XScrew alignment bolt : into the thread
instead of the wheel bolt.XUnscrew the remaining wheel bolts fully.
! Do not place wheel bolts in sand or on a
dirty surface. The bolt and wheel hub
threads could otherwise be damaged when
you screw them in.
XRemove the wheel.306Flat tireBreakdown assistance