Checking tir
epressures manually To determine and set th
ecorrec ttire
pressure ,procee dasfollows:
X Remove th evalvec ap of th etiret hatisto
be checked.
X Press th etirep ressure gauge securely onto
th ev alve.
X Read th etirep ressure and compar eitwith
th er ecommended value on th eTire and
Loading Information placard on the
B-pillar on th edriver' sside of your vehicle.
X If necessary, increas ethe tirep ressure to
th er ecommended value ( Ypage 315).
X If th etirep ressure is to ohigh,release air
by pressin gdown th emetal pin in th evalve
usin gthe tip of apen,for example .Then,
check the tire pressure again using the tire
pressure gauge.
X Screw the valve cap onto the valve.
X Repeatt hese steps for the other tires. Tire pressurel
oss warning system
General notes While the vehicle is in motion, the tire
pressure loss warning system monitors the
set tire pressure using the rotational speed of
the wheels. This enables the system to detect
significant pressure loss in atire. If the speed
of rotation of awheel changes as aresult of
al oss of pressure, acorresponding warning
message will appearint he multifunction
display.
You can recognizet he tire pressure loss
warning by the Run Flat Indicator Active Press 'OK' to Restart message
which appears in the Service menu of the
multifunction display. Further information on
the message displayc an be found under
"Restarting the tire pressure loss warning
system" (Y page 319). Important safety notes The tire pressure warning system does not
warn you of an incorrectly set tire pressure.
Observe the notes on the recommended tire
pressure (Y
page 315).
The tire pressure loss warning does not
replace the need to regularly check the tire
pressure. An even loss of pressure on several
tires at the same time cannot be detected by
the tire pressure loss warning system.
The tire pressure monitor is not able to warn
you of asudden loss of pressure, e.g. if the
tire is penetrated by aforeign object.Int he
event of asudden loss of pressure, bring the
vehicle to ahalt by braking carefully. Avoid
abrupt steering maneuvers.
The function of the tire pressure loss warning
system is limited or delayed if:
R snow chains are mounted on your vehicle's
tires.
R road conditionsa re wintry.
R you are driving on sand or gravel.
R you adopt avery sporty driving style
(corneringath igh speeds or driving with
high rates of acceleration).
R you are driving with aheavy load (in the
vehicle or on the roof).
Restarting the tire pressurel oss
warning system Restart the tire pressure loss warning system
if you have:
R
changed the tire pressure
R changed the wheels or tires
R mounted new wheels or tires
X Before restarting, make sure that the tire
pressures are set properly on all four tires
for the respective operating conditions.
The recommended tire pressure can be
found on the Tire and Loading Information
placard on the B-pillar on the driver's side.
Additionally, atire pressure table is
attached to the fuel filler flap. The tire Tire pressure
319Wheels and tires Z
Tires
Summe
rtires Allo
ywheels V1
BA
225/40 R18 92
WXL5, 6 7.5
Jx18H2
Whee loffset: 2.05 in (52 mm) 0012
All-weather tires Alloy wheels V1
BA
225/45 R17 91
HM+S5, 6 7.5
Jx17H2
Whee loffset: 2.07 in (52.5 mm) 0012
Winte
rtires Alloy wheels V1
BA
205/50 R17 93
HXLM+S000E 5 6.5
Jx17H2
Whee loffset: 1.93 in (49 mm) 0012
Emergency spare wheel
Important safety notes
G
WARNING
The wheel or tire size as wel lasthe tire type
of the spare wheel or emergency spare wheel
and the wheel to be replaced may differ.
Mounting an emergency spare wheel may
severely impair the driving characteristics.
There is arisk of an accident.
To avoi dhazardou ssituations:
R adapt you rdriving style accordingly and
drive carefully.
R never mount more than one spare whee lor
emergency spare whee lthat differs in size.
R only use aspare whee loremergency spare
whee lofad ifferent size briefly.
R do not switch ESP ®
off.
R have aspare whee loremergency spare
whee lofad ifferent size replaced at the
nearest qualified specialist workshop.
Observe that the whee land tire dimensions
as wellast he tire type must be correct. When using an emergency spare whee
lor
spare whee lofadifferent size, you must not
exceed the maximu mspee dof50m ph
(80 km/h).
Snow chains must not be mounted on
emergency spare wheels. General notes
i Apart from some country-specific
variants, the vehicles are not equipped with
an emergency spare wheel. Emergency
spare wheels are specifi ctothe vehicle. For
more information on which emergency
spare wheels are approved for your vehicle,
consult aqualified specialist workshop.
You should regularly check the pressure of
the emergency spare wheel, particularly prior
to long trips, and correct the pressure as
necessary (Y page 315). The value on the
wheel or as given in the "Wheels and tires"
section (Y page 343) is valid.
i When you are driving with the collapsible
spare wheel mounted, the tire pressure
loss warning system or the tire pressure
5 Also available as MOExtended tires.
6 Use of snow chains is not permitted. Observe the notes in the "Snow chains" section. 342
Emergency sparew
heelWheels and tires
