Page 336 of 469

It is only permissible
tofit a di fferent wheel
size in theev ent of a flat tyre in order to
drive tothe specialist workshop.
R Do not make any modifications tothe brake
sy stem, the wheels or the tyres.
The use of shims or brake dust shields is not
permitted and may in validate theve hicle's
ge neral operating pe rmit.
R Vehicles with a tyre pressure monitoring
sy stem: allfitted wheels mu stbe equipped
with functioning sensors forth e tyre pres‐
sure monitoring sy stem.
R Attemp eratures below 7 °C use winter tyres
or all-season tyres mar ked M+S for all
wheels.
Wi nter tyres bearing thei snowflake
symbol in addition tothe M+S marking pro‐
vide the best possible grip in wintry road
conditions.
R For M+S tyres, only use tyres with the same
tread.
R Obser vethe maximum permissible speed for
th e M+S tyres fitted. If
th e tyre's maximum speed is below that of
th eve hicle, this must be indicated byan
appropriate label in the driver's field of
vision.
R Run in new tyres at moderate speeds forthe
fi rs t10 0 km.
R Replace the tyres af ter six years at the latest,
re ga rdless of wear.
R When replacing with tyres that do not
fe ature run-flat characteristics: vehicles
with MOExtended tyres are not equipped
with a TIREFIT kit at thefa ctor y.Equip the
ve hicle with a TIREFIT kit af terre placing with
tyres that do not feature run-flat characteris‐
tics, e.g. winter tyres.
% You can permanently limit the maximum
ve hicle speed for driving with winter tyres
(/ page 194).
Fo r more information on wheels and tyres, con‐
ta ct a qualified specialist workshop.
Be sure toalso obse rveth efo llowing fur ther
re lated subjects:
R Notes on tyre pressure (/ page 326)R
Tyre pressure table (/ page 327)
R Notes on the emer gency spa rewheel
(/ page 340) Note
s on inter changing wheels &
WARNING Risk of inju rythro ugh dif fer‐
ent wheel sizes
Inter changing the front and rear wheels can
se verely impair the driving characteristics.
The disk brakes or wheel suspension compo‐
nents may also be damaged. #
Onlyinter change the front and rear
wheels if the wheels and tyres ha vethe
same dimensions. Inter
changing the front and rear wheels if the
wheels or tyres ha vediffere nt dimensions can
re nder thege neral operating pe rmit in valid.
The wear pat tern s on the front and rear wheels
dif fer:
R front wheels wear more on the tyre shoulder Wheels and tyres
333
Page 412 of 469
Display messages
Possible causes/consequences and M
MSolutions #
Stop theve hicle in accordance with the tra ffic conditions. #
Check the tyre pressure (/ page 326) andthe tyres. #
When the tyre pressure is cor rect, restart the tyre pressure loss warning sy stem (/ page 329).
Check tyre pressures then
restart Run Flat Indicator *T
he tyre pressure loss warning sy stem generated a displ aymessa geand has not been restar ted since. #
When the tyre pressure is cor rect, restart the tyre pressure loss warning sy stem (/ page 329).
Run Flat Indicator inopera-
tive *T
he tyre pressure loss warning sy stem is malfunctioning. #
Consult a qualified specialist workshop. Exhaust
gas af tertre atment Display messages
Possible causes/consequences and M MSolutions
Ø Refill AdBlue See Owner’s
Manual *
The AdBlue ®
leve l has fallen into there ser verange. #
Top up AdBlue ®
immediately (/ page 172). Displ
aymessa ges and warning/indicator lamps 409
Page 443 of 469

App
lybrake todeselect Park (P)
position ...............................................3 78
App lybrake toselect D or R ................378
App lybrake toselect R ........................ 378
Au xilia rybattery malfunction .............. 380
Beginning emer gency stop .................. 388
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ...................... 393
Blind Spot Assist inope rative ............... 393
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...3 93
Cannot start engine See Owner's
Manual ................................................ 404
Check tyre pressures then restart
Ru n Flat Indicator ................................ 409
Cruise control and Limiter inope ra‐
tive ...................................................... 385
Cruise control inope rative ................... 385
Cruise control off ................................ 385 Fr
ont-passenger airbag disabled See
Owner's Manual ................................... 361
Fr ont-passenger airbag enabled See
Owner's Manual ................................... 361
Hazard warning lamps malfunction‐
ing ...................................................... .369
Limi ter inoperative .............................. 386
Limiter passive .................................... 385
Mercedes me connect Services limi‐
te d See Owner's Manual ...................... 401
Mo tor can be star ted again .................4 04
N permanently active Risk of vehicle
ro lling .................................................. 379
Only select Park (P) when vehicle is
st ationary ............................................ 377
Place theke y in the mar ked space
See Owner's Manual ...........................364
PRE-SAFE inoperative See Owner's
Manual ................................................ 362
Re duce speed ...................................... 408 Re
versing not poss. Consult work‐
shop ....................................................3 79
Risk of vehicle rolling Driver door
open and transmission not in P ...........378
Ru n Flat Indicator inope rative ............. 409
Speed limit (winter tyres) XXX km/h ... 387
St op vehicle Lea veengine running
Wa itTransmission cooling ...................380
To shift out of P or N,depress brake
and start engine .................................. 378
To switch off the engine, press the
St art/ Stop button for at least 3 sec‐
onds or 3 times. .................................. 375
Tr af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ...................... 392
Tr af fic Sign Assi stinope rative ............. 392
Tr ansmission Malfunction Stop ........... 379
Ty re press. monitor cur rently una vail‐
able .................................................... .405
Ty re press. monitor inoperative ...........405 440
Index