
*
NO
TEDama geand malfunctions due to
impurities in AdBlue ® Impu
rities in AdBlue ®
lead to:
R Increased emissions values
R Damage tothe catalytic con verter
R Engine damage
R BlueTEC exhaust gas af tertre atment mal‐
functions #
Avoid impurities in AdBlue ®
. +
ENVI
RONMENTAL NOTEContamination
caused byAdBlue ® Ad
Blue ®
re sidues cr ystallise af ter a period of
time, and contamina tethe sur faces wi th
which they come into contact. #
Surfaces that ha vecome into contact
wi th Ad Blue®
while refilling must be
immediately rinsed wi thwa ter,or
Ad Blue ®
must be remo ved with a damp
clo thand cold water. If
Ad Blue ®
has al ready cr ystallised, clean it
with a spon geand cold water. When
you open theAd Blue ®
tank, small
amounts of ammonia vapour may escape. Do
not inhale any ammonia vapours that may be
re leased. Only fill th eAd Blue ®
tank in well-venti‐
lated areas.
Ad Blue ®
filling capacity
To tal capacity of AdBlue ®
tank Mode
lT otal capacity
All models 23.5 l Engine oil
Note
s on engine oil
Obser vethe no tes on service products
(→ page 368). *
NO
TEEngine dama gecaused byan
incor rect oil filter, incor rect oil or addi‐
tives #
Do not use engine oils or oil filters
which do not cor respond tothe specifi‐
cations explicitly prescribed forthe
service inter vals. #
Do not alter the engine oil or oil filter in
order toachie velonger change inter vals
th an presc ribed. #
Do not use additives. #
Have the engine oil rene we d at regular
inter vals. Te
ch nical da ta373 

Display messages
Possible causes/consequences and M
MSolutions
? *T
hefan mo tor is defective. #
Avoiding high loads on the engine, drive on tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C.
Ø
Refill AdBlue See Owner’s
Manual *
The AdBlue ®
leve l has fallen below there ser verange. #
Refill Ad Blue ®
immediately .
Ø Refill AdBlue No start in
XXX km *
The AdBlue ®
leve l is only suf ficient forth e displa yed dis tance. #
Refill Ad Blue ®
immediately .
% The message disappea rsafte r driving at a speed abo ve15 km/h for appro ximately one minu te.
Ø Refill AdBlue Eng. start not
possible *
The AdBlue ®
tank is em pty. Yo u can no lon gerst art the engine. #
Top up at least 4.5 l of AdBlue ®
. #
Switch the ignition on.
Yo u can restart the engine af ter appro ximately one minu te. Displ
aymessa ges and warning/indicator lamps 415 

Display messages
Possible causes/consequences and M
MSolutions
Ø Check AdBlue See Owner’s
Manual *
The AdBlue ®
sy stem is malfunctioning. #
Consult a qualified specialist workshop.
Ø Eng. start not possible in
XXX km *
The AdBlue ®
sy stem is malfunctioning. #
Consult a qualified specialist workshop immediatel y.
Ø
Eng. start not possible *
The AdBlue ®
sy stem is malfunctioning. you can no lon gerst art the engine. #
Consult a qualified specialist workshop immediatel y.416
Displaymessa ges and warning/indicator lamps 

Ad
aptive functions, MULTIBEAM LED
see Intelligent Light Sy stem
Ad aptive Highbeam Assist
Ac tivating/deactivating ...................... .133
Fu nction .............................................. 13 2
Ad aptive Highbeam Assist Plus
Ac tivating/deactivating ...................... .135
Fu nction .............................................. 13 4
Ad Blue ®
.................................................... 372
Ad ditives .............................................. 372
Filling capacity ..................................... 373
No tes ................................................... 17 9
Purity ................................................... 372
To pping up ...........................................1 79
Ad ditional door lo ck.................................. 71
Ad diti ves.................................................. 373
Ad Blue ®
............................................... 372
Engine oil ............................................. 373
Fu elling ................................................ 371
Ad diti ves (AdBlue ®
)
see AdBlue ®
Ad diti ves (engine oil)
see Additives Ad
diti ves (fuel)
see Fuelling
Ad justing the balance/ fader
Burmes ter®
sur round sound sy stem ... 305
Ad justing the headlamp range ............... 12 8
Ad justing the sound optimisation
Burmes ter®
sur round sound sy stem ... 305
ADS PLUS damping sy stem
see AIR BODY CONTROL
Ad versewe ather light ............................ .132
Af ter-sales service centre
see ASS YST PLUS
AIR BODY CONT ROL................................ .213
Setting ................................................. 215
Suspension .......................................... 213
Air conditioning sy stem
see Climate control
Air distribution ........................................ .147
Air freshener sy stem
see Frag rance sy stem
Air suspension see AIR BODY CONTROL Air
vents ................................................... 157
Ad justing (front) ................................... 157
Ad justing (rear) .................................... 15 8
Glo vebox .............................................1 58
Air vents
see Air vents
Ai r-re circulation mode ............................ 15 0
Airbag ........................................................ .38
Ac tivation .............................................. 32
Belt airbag ............................................ .36
Fr ont airbag (driver, front passenger) ....38
Ins tallation locations ............................ .38
Knee airbag ........................................... 38
Overview ............................................... 38
Pr otection ..............................................39
Re duced pr otection ...............................40
Side impact airbag ................................ 38
Wi ndowbag ............................................ 38
Ai rflow ...................................................... 147
AIRPANEL (Care) ...................................... 317
Alarm see Panic alarm Index
457 

Au
tomatic front passen ger airbag
shu toff ........................................................ 41
Fu nction of the automatic front
passenger airbag shutoff ....................... 41
Au tomatic front passen ger front air‐
bag deacti vation sy stem .................... .41, 42
PA SSENGER AIR BAG indicator lamp .... .42
Au tomatic front passen ger front air‐
bag deacti vation sy stem
see Automatic front passenger front
airbag deactivation sy stem
Au tomatic mir rorfo lding function
Ac tivating/deactivating ...................... .145
Au tomatic transmission
DIRECT SELECT le ver ........................... 172
Drive program display .......................... 17 0
Drive programs .................................... 17 0
DY NA MIC SELECT switch .................... 17 0
Engaging drive position ........................ 173
Engaging reve rsege ar ........................ .173
Kickdown ............................................. 175
Manual gearshifting ............................ .174
Selecting pa rkposition ........................ 173
Shifting toneutral ................................ 173St
eering wheel gearshift paddles ........ .174
Tr ansmission position display .............. 172
Tr ansmission positions ........................ 172
Axle load Perm issible .......................................... 366
Tr ailer operation .................................. 380 B
Ball neck Extending/r etra cting ........................... 24 5
BA S (Brake Assist Sy stem) .................... .191
Battery Charging (Remo teOnline) .................... 16 3
Ke y ........................................................ 69
Re mo tecontrol (s tationary heater) ...... 15 6
Battery (vehicle) Charging .............................................. 332
Notes .................................................. 330
St arting assis tance .............................. 332
Belt see Seat belt
Belt airbag Activation .............................................. 32 Fu
nction/no tes .....................................36
Bic ycle rack
Tr ailer operation .................................. 24 8
Blind Spot Assi st..................................... 239
Ac tivating/deactivating ...................... .241
Fu nction .............................................. 239
Sy stem limitations ...............................2 39
Blo wer
see Climate control
BlueTEC see AdBlue ®
Blue tooth ®
Ac tivating/deactivating ...................... .275
Settings ............................................... 274
Blue tooth ®
Au dio
Ac tivating ............................................ 300
Ad justing thevo lume .......................... .300
Displ aying device de tails .................... .301
Information .......................................... 299
Overview ............................................. 299
Sear ching for and auth orisingthe
device .................................................. 299 Index
459 

Ad
aptive Highbeam Assist cur rently
una vailable See Owner's Manual .........438
Ad aptive Highbeam Assist inopera‐
tive ...................................................... 437
Ad aptive Highbeam Assist Plus Cam‐
era view restricted See Owner's
Manual ................................................ 437
Ad aptive Highbeam Assist Plus cur‐
re ntly una vailable See Owner's Man‐
ual ...................................................... .437
Ad aptive Highbeam Assist Plus inop‐
erative ................................................ .436
4 Add 1 litre engine oil when
next refuelling ...................................... 413
Air conditioning Malfunction See
Owner's Manual .................................. 428
App lybrake todeselect Park (P)
position ...............................................4 25
Apply brake toselect R ....................... 429 À
ATTENTION ASSIST
inoperative .......................................... 399
À ATTENTION ASSIS T:Take a
break! .................................................. 399
b AUTO lights inope rative .............. 436
Au xilia rybattery malfunction ...............427
_ Before starting the engine, turn
th esteering wheel. .............................. 429
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ...................... 402
Blind Spot Assist inope rative ............... 403
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...4 03
Brake immediate ly............................... 391
 Change key bat teries ................. 422
Ø Check AdBlue See Owne r’s
Manual .................................................4 16
J Check brake fluid le vel.............. .391
4 Check eng. oil le v.when next
re fuelling .............................................. 411j
Check trailer hit chlock .............. 424
h Check tyre(s) .............................. 41 8
! Clean the fuel filter .................... .414
Clutch overheated Avoid pulling away
fo r XX:XX mins ................................... .428
? Coolant Stop vehicle Switch
engine off ............................................ 407
Cruise contro l and Limiter inope ra‐
tive ...................................................... 406
Cruise control inope rative ................... 405
Cruise control off ................................ 405
! currently una vailable See Own‐
er's Manual ........................................ .383
÷ currently una vailable See Own‐
er's Manual ........................................ .384
Dep ress clutch fully tostart engine .....4 28
È .................................................... 406
Ø Eng.start not possible in XXX
km ...................................................... .416
Ø Eng.start not possible ................416 Index
465 

Ø
Refill Ad Blue Eng. start not
possible .............................................. .415
Ø Refill Ad Blue No start in XXX
km ...................................................... .415
Ø Refill Ad Blue See Owne r’s
Manual .................................................4 15
! Release parking brake ................ 387
¸ Replace air cleaner .....................414
, Replace key See Owner's Man‐
ual ...................................................... .421
 Replace key ................................ 421
8 Reser vefuel le vel........................ 414
6 Restra int sys. malfunction Con‐
sult workshop ...................................... 395
Re versing not poss. Consult work‐
shop ....................................................4 27
Risk of vehicle rolling Driver door
open and transmission not in P ...........425
# See Owner's Manual .................. 408
Speed limit (winter tyres) XXX km/h ... 406#St
art engine See Owner's Man‐
ual ...................................................... .408
Ð Steering malfunction Drive
carefully Visit workshop ....................... 431
Ð Steering malfunction Incre ased
ph ysical ef fort See Owner's Manual .... 432
Ð Steering malfunction See Own‐
er's Manual ......................................... 430
Ð Steering malfunction Stop
immediately See Owner's Manual ........ 431
St op vehicle Lea veengine running
Wa itTransmission cooling ...................427
# Stop vehicle Lea veengine run‐
ning ...................................................... 411
# Stop vehicle See Owner's Man‐
ual .......................................................4 09
É Stop vehicle Vehicle too low .......4 00
b Switch off lights ......................... 436
b Switch on headla mps................. 436 To
shift out of P or N,depress brake
and start engine .................................. 425
To p up coolant See Owner ’sManual ... 407
¥ Top up washer fluid .................... 434
j Trailer coupling extending… ........ 423
Tr ansmission Malfunction Stop ........... 427
! Turn on the ignition torelease
th e parking brake ................................ 386
Ty re press. monitor cur rently una vail‐
able ...................................................... 419
Ty re press. monitor inoperative ...........420
Ty re press. monitor inoperative No
wheel sensors .................................... .420
Ty re pressure Check tyres ....................417
Ty re(s) ove rheated ...............................4 20
Ty re(s) ove rheated Reduce speed ........ 421
d Vehicle is operational Switch
off the ignition before exiting .............. 426
É Vehicle rising Please wait.......... .400
É Vehicle rising .............................. 399 Index
467 

Calling up menus ................................
.268
Central control elements ..................... 264
Configu ring displ aysettings ................2 73
Main functions .................................... 268
Overview ............................................. 264
Re storing thefa ctory settings .............. 276
Switching the sound on/off ................. 271N
Na vigation
Menu (on-board computer) .................. 258
Na vigation messages
On-board computer ............................. 258
Ne arField Communication (NFC)
Locking theve hicle (digital vehicle
ke yst icke r) ............................................ 72
Locking theve hicle (mobile phone) .......72
St arting theve hicle (Digital Car Key
st icke r) ................................................. 161
St arting theve hicle (mobile phone) ..... 161
Un locking theve hicle (digital vehicle
ke yst icke r) ............................................ 72
Un locking theve hicle (mobile phone) ....72 Ne
utral
Selecting .............................................. 173 O
Occupant saf ety
Pe ts in theve hicle ................................. 65
Occupant saf ety
see Airbag
see Automatic front passenger air‐
bag shutoff
see PRE-SAFE ®
(anticipatory occu‐
pant pr otection)
see PRE-SAFE ®
Impulse Side
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
see Restra int sy stem
see Seat belt
Odome ter
see Total dis tance recorder
Oil see Engine oil
On-board co mputer ................................. 261
Assis tance graphic menu .................... 256
Displaying the service due date ........... 306 Media menu ........................................2
60
Menu designs ...................................... 262
Menus ................................................. 253
Multifunction display ........................... 255
Na vigation menu ................................. 258
Operating ............................................ 253
Ra dio menu .........................................2 59
Service menu ...................................... 256
Te lephone menu .................................. 260
Tr ip menu ............................................ 257
On-boa rddiagno stics inter face
see Diagno stics connection
On-boa rdelectronics
Engine electronics .............................. .364
No tes ................................................... 364
Tw o-w ayradios .................................... 364
Open-source software .............................. 30
Opening the boot lid using your foot
HANDS-FREE ACCESS .......................... .79
Operating fluids
Ad Blue ®
............................................... 372
Brake fluid .......................................... .374
Coolant (engine) .................................. 375
Fu el (petrol) ......................................... 370 Index
477