rofitted tyre pressure monitors which are
screwed on to the valve may overload it and
cause it to fail .Due to their design, the valve
is kept open continuously, which may lead to
air loss. G
Ris
kofa ccident
Should the tyre pressure drop repeatedly:
R check the tyre for foreign bodies.
R check whether the wheel is losing air or the
valve is leaking.
R make sure that only a valve cap approved
by Mercedes-Benz is fitted on the tyre
valve.
Tyre pressures that are to olow have a nega-
tive effect on vehicle safety, which could lead
you to cause an accident.
If possible, only correc ttyre pressures when
the tyres are cold. The tyres are cold when
the vehicle has been parked fo ratleast three
hours or has been driven less than 1.5 km.
Depending on the ambient temperature, the
speed you are driving at and the load on the
tyres, the tyre temperature and thus the tyre
pressure may change by approximately
10 kPa (0.1 bar, 1.5 psi) per 10 †. Take this
into accoun twhen checking the pressure of
warm tyres and only correct it if it is too low
for the current operating conditions.
Driving with tyre pressure that is too high or
too low can:
R shorten the service life of the tyres
R cause increased tyre damage
R have a negative effect on handling charac-
teristics and thus the driving safety (e.g. by
causing aquaplaning)
i The tyre pressure values given for low
loads are minimum values which offer you
good ride comfort characteristics.
However, you can also use the values given
for higher loads. These are permissible and
will not adversely affect the running of the
vehicle. H
Environmental note
Check the tyre pressure regularly, at least
every 14 days. Tyre pressure loss warning system
Important safety notes While the vehicle is in motion, the tyre pres-
sure loss warning system monitors the set
tyre pressure using the rotational speed of
the wheels. This enables the system to detect
significant pressure loss in a tyre. If the speed
of rotation of a wheel changes as a result of
a loss of pressure, a corresponding warning
message will appearint
he multifunction dis-
play. G
Risk of accident
The tyre pressure loss warning system does
not warn you of an incorrectly set tyre pres-
sure. The table on the inside of the fuel filler
flap will help you decide whether the tyre
pressures should be corrected.
The tyre pressure loss warning system does
not replace the need to regularly check your
vehicle's tyre pressures, since an even loss of
pressure on several tyres at the same time
cannot be detected by the tyre pressure loss
warning system.
The tyre pressure monitor is not able to warn
you of a sudden loss of pressure, e.g. if the
tyre is penetrated by a foreign object.
In the event of a sudden loss of pressure, bring
the vehicle to a halt by braking carefully. Do
not make any sudden steering movements
when doing so.
The function of the tyre pressure loss warning
system is limited or delayed if:
R snow chains are fitted to your vehicle's
tyres.
R road conditions are wintry.
R you are driving on sand or gravel. 306
Tyre pressureWheels and tyres
Tyres
Summer tyres Light-alloy wheels V1 V2 V3 V4
BA 245/45 R17 99 Y XL 8.0J x 17 H2 ET 30 #
— — —
BA 245/45 R17 99 Y XL
MOExtended
42 8.0J x 17 H2 ET 30 #
— — —
BA 245/45 R17 99 Y XL 8.5J x 17 H2 ET 34.5 # #
— —
BA 245/45 R17 99 Y XL
MOExtended
42 8.5J x 17 H2 ET 34.5 # #
— —
BA 255/40 R18 99 Y XL 8.5
Jx18 H2 ET 34.5 # # #
—
BA 255/40 R18 99 Y XL
MOExtended
42 8.5
Jx18 H2 ET 34.5 # # #
—
FA
RA 255/40 R18 99 Y XL
285/35 R18 97 Y
43 8.5
Jx18 H2 ET 34.5
9.5J x 18 H2 ET 48 # # #
—
FA
RA 255/40 R18 99 Y XL
MOExtended
42
285/35 R18 97 Y
MOExtended 42,43 8.5
Jx18 H2 ET 34.5
9.5J x 18 H2 ET 48 # # #
—
FA
RA 255/35 R19 96 Y XL
285/30 R19 98 Y XL
43 8.5
Jx19 H2 ET 34.5
9.5 J x 19 H2 ET 48 # # #
—
FA
RA 255/35 ZR 19 (96 Y) XL
285/30 ZR19 (98 Y) XL
43 9.0 J x 19 H2 ET 37
10.0 Jx19 H2 ET 47 — — — #
Winter tyres Light-allo
ywheels V1 V2 V3 V4
BA 245/45 R17 99 H XL M+Si 8.0J x 17 H2 ET 30 #
— — —
BA 245/45 R17 99 H XL
M+SiMOExtended
42, 44 8.0J x 17 H2 ET 30 #
— — —
BA 245/45 R17 99 H XL M+Si 8.5J x 17 H2 ET 34.5 # #
— —
BA 245/45 R17 99 H XL
M+SiMOExtended
42 8.5J x 17 H2 ET 34.5 # #
— —
BA 255/40 R18 99 V XL M+S
i 8.5
Jx18 H2 ET 34.5 # # #
—
42
MOExtended tyres (tyres featuring run-fla tcharacteristics) only in combination with an activated tyre pres-
sure loss warning system.
43 Use of snow chains not permitted. Observe the notes in the "Snow chains" section.
44 Not available from the factory. 312
Wheel and tyre combinationsWheels and tyres
Winter tyres Light-alloy wheels V1 V2 V3 V4
BA 255/40 R18 99 V XL
M+SiMOExtended
42,44 8.5
Jx18 H2 ET 34.5 # # #
—
BA 255/35 R19 96 V XL M+S
i 9.0 J x 19 H2 ET 37 — — — #
FA
RA 255/35 R19 96 V XL M+S
i
285/30 R19 98 V XL M+S i43 9.0 J x 19 H2 ET 37
10.0
Jx19 H2 ET 47 — — — #
"Minispare" emergency spare wheel
43Tyres Light-allo
ywheels V1 V2 V3 V4
T 155/60 R18 107 M
Tyre pressure: 420 kPa (4.2 bar/61 psi) 4.5 B x 18 H2 ET 36 # # #
—
Collapsible emergency spare wheel
43Tyres Light-alloy wheels V1 V2 V3 V4
175/50 - 19 97 P
Tyre pressure: 350 kPa (3.5 bar/51 psi) 6.5 B x 19 H2 ET 14 — — — #
Depending on the country, the engine and the wheels fitted, you
rvehicle may be equipped
with TIREFIT, a "Minispare" emergency spare wheel or a collapsible emergency spare wheel.
i The specified tyre pressure is printed in yellow on the emergency spare wheel.
42 MOExtended tyres (tyres featuring run-flat characteristics) only in combination with an activated tyre pres-
sure loss warning system.
44 Not available from the factory.
43 Use of snow chains not permitted. Observe the notes in the "Snow chains" section. Wheel and tyre combinations
313Wheels and tyres Z
