Mercedes-Benz R-Class Owner's Manual page 325

Practical advice
Flat tyre
The air pump can be operated again once
it has cooled down.
If the tyre pressure is higher than 3.0 bar:
Version 1: open pressure release
X
screw 4 on the pressure gauge until the
tyre pressure is correct.
Version 2: press pressure release button
X
6 until the tyre pressure is correct.
Switch off the electric air pump with on/off
X
switch 2, remove from the tyre valve and
stow it away.
Lowering the vehicle
Place the ratchet ring spanner onto the
X
hexagon nut of the jack so that the lettering
AB is visible.
Lower the vehicle by turning the ratchet
X
ring spanner until the vehicle is once again
standing firmly on the ground.
Place the jack to one side.
X
322
– 5 Wheel bolts
1
Tighten the wheel bolts evenly in a cross-
X
wise pattern in the sequence indica-
ted (1 to 5). The tightening torque is
150 Nm.
G Risk of accident
Have the tightening torque checked imme-
diately after a wheel is changed. The wheels
could work loose if they are not tightened
to a torque of 150 Nm.
Turn the jack back to its initial position and
X
stow it and the rest of the vehicle tool kit in
the luggage compartment.
Transport the faulty wheel in the boot.
X
or
Depending on the size of the wheel, you
X
may also be able to secure the faulty wheel
in the emergency spare wheel well. In this
case, you will have to remove the stowage
tray from the emergency spare wheel well
and stow it securely in the luggage com-
partment.
i
Do not activate the tyre pressure moni-
tor* until the deflated tyre has been
removed from the vehicle.
MOExtended run-flat system*
The MOExtended run-flat system must only
be used in conjunction with the tyre pressure
loss warning system*.
!
The maximum permissible distance which
can be driven in run-flat mode depends on
the load in the vehicle. It is 50 km if the
vehicle is partially laden and 30 km if fully
laden.
The maximum range that can be driven in
emergency operation is measured from the
point at which the pressure loss warning
message appears in the multi-function dis-
play.
* optional