for monitoring. In most cases,the tire pressure
monitor wil lautomatically detect the new refer-
ence values after you have changed the tire
pressure. However, you can als odefine refer-
ence values manually as described here. The tire
pressure monitor then monitors the new tire
pressure values.
XSet the tire pressure to the valu erecommen-
ded for the corresponding driving situation on
the Tire and Loading Informatio nplacard on
the driver's side B-pillar (
Ypag e319).
You can find more tire pressure values for
various operating conditions in the tire pres-
sure tabl einsidet he fuel filler flap
(
Ypag e319).
XMake sure that the tire pressure is correct on
all four wheels.
XMake sure that the SmartKey is in position 2
in the ignition lock (Ypag e131).
XPress òon the steering whee ltocall up
the menu list.
XPress 9or: on the steering whee lto
select the Servicemenu.
XConfirm by pressing aon the steering
wheel.
XPress 9or: to select Tire Pres‐sure.
XPressato confirm.
The multifunction display showst he current
tire pressure of each whee lortheTire
pressurew ill be displayed afterdrivingafew minutesmessage.
XPress the :button.
The UseCurrentPressuresasNewRef‐erence Valuesmessage is shownint he
multifunction display.
If you wis htoconfirm the restart:
XPress the abutton.
The TirePress.MonitorRestartedmes-
sage is shownint he multifunction display.
After driving for afew minutes ,the system
checks whethe rthe current tire pressures are
withi nthe specified range. The new tire pres-
sure sare then accepted as reference values
and monitored.
If you wis htocancel the restart:
XPress the %button.
The tire pressure values stored at the last
restart wil lcontinue to be monitored.
Loading the vehicle
Instruction labels for tires and loads
GWARNING
Overloade dtires can overheat, causing a
blowout. Overloade dtires can als oimpair the
steering and driving characteristics and lead
to brake failure. There is arisk of accident.
Observet he loadrating of the tires. The load
rating must be at least hal fofthe GAWR of
you rvehicle. Never overload the tires by
exceeding the maximu mload.
Two instruction labels on you rvehicles how the
maximu mpossible load.
(1) The Tire and Loading Informatio nplacard is
on the B-pillar on the driver's side .The Tire
and Loading Informatio nplacard showst he
maximu mpermissible numbe rofoccu-
pants and the maximu mpermissible vehicle
load. It als ocontains details of the tire sizes
and corresponding pressures for tires
mounted at the factory.
(2) The vehicl eidentificatio nplate is on the B-
pillar on the driver's side .The vehicl eiden-
tification plate informs you of the gross
vehicl eweight rating. It is made up of the
vehicl eweight, all vehicl eoccupants, the
fuel and the cargo. You can als ofind infor-
mation about the maximu mgross axle
weight rating on the front and rear axle.
The maximu mgross axle weight rating is
the maximu mweight that can be carrie dby
one axle (front or rear axle). Never exceed
the maximu mloadort he maximu mgross
axle weight rating for the front or rear axle.
:B-pillar, driver's side
326Loading the vehicle
Wheels and tires
Tire-mounting tools should not be used near
the valve. This could damage the electronic
components.
Only have tires changed ataqualified spe-
cialist workshop.
Always observe the instructions and safety
notes in the "Mounting awheel" section
(
Ypage 336).
The wear pattern sonthe front and rear tires
differ, depending on the operating conditions.
Rotate the wheels before aclear wear pattern
has formed on the tires. Frontt ires typically
wear more on the shoulders and the rear tires in the center.
On vehicles that have the same size front and
rear wheels, you can rotatet he wheels accord-
ing to the intervals in the tire manufacturer's
warranty book in your vehicle documents. If no
warranty book is available, the tires should be
rotated every 3,000 to 6,000 miles (5,000 to
10,000k m).Earlier may be necessary, depend-
ing on the degree of tire wear. Do not change the
direction of wheel rotation.
Clean the contact surfaces of the wheel and the
brake disc thoroughly every time awheel is rota-
ted. Check the tire pressure and, if necessary,
restart the tire pressure loss warning system
(
Ypage 323) or the tire pressure monitor
(Ypage 325).
Direction of rotation
Tires with aspecified direction of rotation have
additional benefits ,e.g. if there is arisk of hydro-
planing. These advantages can only be gained if
the tires are installed corresponding to the
direction of rotation.
An arrow on the sidewall of the tire indicates its
correctd irection of rotation.
Storing wheels
Storewheels that are not being used in acool,
dry and preferably dark place. Protectt he tires
from oil, grease, gasoline and diesel.
Mounting awheel
Preparing the vehicle
XStop the vehicle on solid, non-slippery and
level ground.
XApply the electric parking brake manually.
XBring the front wheels into the straight-ahead position.
XShift the transmission to position P.
XMake sure that the vehicle level is set to "Nor-
mal" on vehicles with AIRMATIC(Ypage 172).
XSwitch off the engine.
XVehicles without KEYLESS-GO: remove the
SmartKey from the ignition lock.
XVehicles with KEYLESS-GO start-function
or KEYLESS-GO: open the driver's door.
The on-board electronics now have status 0.
This is the same as the SmartKey having been
removed.
XVehicles with KEYLESS-GO start-function
or KEYLESS-GO: remove the Start/Stop but-
ton from the ignition lock (
Ypage 131).
XMake sure that the engine cannot be started
via your smartphon e(Ypage 134).
XIf included in the vehicle equipment, remove
the tire-change tool kit from the vehicle.
XSafeguard the vehicle against rolling away.
Securing the vehicle to prevent it from
rolling away
If your vehicle is equipped with awheel chock,i t
can be found in the vehicle tool kit (Ypage 300).
The folding wheel chock is an additional safety
measure to prevent the vehicle from rolling
away,f or example when changing awheel.
336Changing awheel
Wheels and tires
