
Ad
Blue ®
is a wate r-soluble fluid forth eex haust
ga s af tertre atment of diesel engines.
* NO
TEDama gecaused bymixing addi‐
tives with AdBlue ®
or from diluting
Ad Blue ® The BlueTEC
exhaust gas af tertre atment sys‐
te m could be destr oyed by:
R Additives in AdBlue ®
R Diluting AdBlue ® #
Only use AdBlue ®
in accordance wi th
ISO 222 41 . #
Do not add additives. #
Do not dilu teAd Blue ®
. *
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 25 l Engine oil
Note
s on engine oil
Obser vethe no tes on operating fluids
(→ page 412). 416
Tech nical da ta

Display messages
Possible causes/consequences and M
MSolutions
4 Engine oil pressure Stop
Switch off engine *D
isplay message only with cer tain engines:
The engine oil pressure is too lo w.
* NO
TEEngine dama gecaused bydriving with insuf ficient engine oil pressure #
Avoid long journe yswith insuf ficient engine oil pressure. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances. #
Consult a qualified specialist workshop.
5 Engine oil level cannot be
measured *T
he electrical connection tothe oil le vel sensor is inter rupte d or the oil le vel sensor is faulty.
The engine oil le vel has dropped tothe minimum le vel. #
Consult a qualified specialist workshop.
Ø Refill AdBlue See Owner’s
Manual *
The AdBlue ®
leve l has fallen below there ser verange. #
Refill Ad Blue ®
immediately . 456
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
! Clean the fuel filter *
Ve hicles with a diesel engine: thewate r inthe fuel filter must be drained off. #
Consult a qualified specialist workshop.
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.
Ø
Check AdBlue See Owner’s
Manual *
The AdBlue ®
sy stem is malfunctioning. #
Consult a qualified specialist workshop.
8 Reserve fuel level *T
he fuel le vel has dropped into there ser verange. #
Refuel. Displ
aymessa ges and warning/indicator lamps 457

Display messages
Possible causes/consequences and M
MSolutions
Ø Eng. start not possible in
XXX mi *
The AdBlue ®
sy stem is malfunctioning. #
Consult a qualified specialist workshop immediatel y.
¸
Replace air cleaner *
Ve hicles with a diesel engine: the engine air filter is dirty and must be replaced. #
Consult a qualified specialist workshop.
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.
Ø
Refill AdBlue No start in
XXX mi *
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. 458
Display messages and warning/indicator lamps

1,
2, 3 ...
12 V so cket
see Soc ket (12 V)
230 V so cket
see Soc ket (230 V)
360° Camera ........................................... 204
Assigning as a favo urite ...................... .207
Care .................................................... 363
Fu nction .............................................. 204
Selecting a view .................................. 206 A
A/C function Activating/deactivating (control
panel) .................................................. 13 0
Ac tivating/deactivating (multimedia
sy stem) ................................................ 13 0
ABS (Anti-lock Braking Sy stem) ............ .170
Ac celeration
see Kickdown
Ac cess data
Editing ................................................ .322
Setting ................................................. 320 Ac
oustic locking verification signal
Swit ching on/off .................................. .59
Ac tive Blind Spot Assi st......................... 222
Ac tivating/deactivating ...................... .224
Brake application ................................. 222
Fu nction/no tes ................................... 222
Sy stem limits ....................................... 222
Tr ailer operation .................................. 222
Ac tive bonn et(pedestrian pr otection) .. 353
Operation ............................................ 353
Re setting ............................................. 353
Ac tive Brake Assi st.................................. 175
Fu nction/no tes .................................... 175
Setting ................................................. 17 9
Ac tive Eme rgency Stop Assist ...............192
Ac tive Lane Change Assi st...................... 191
Ac tive Lane Keeping Assist .................... 224
Ac tivating/deactivating ...................... .226
Fu nction .............................................. 224
Sensitivity (function/no tes) ................. 227
Setting the sensitivity .......................... 227
Sy stem limits ....................................... 224
Tr ailer operation .................................. 224 Ac
tive light function ................................ 11 7
Ad aptive brake lights ..............................180
Ad aptive cruise control
see Dis tance Pilot DISTRONIC
Ad aptive functions, MULTIBEAM LED
see Intelligent Light Sy stem
Ad aptive Highbeam Assist Plus
Ac tivating/deactivating ...................... .120
Fu nction ............................................... 11 9
Ad Blue ®
.................................................... 41 5
Ad ditives .............................................. 41 5
Filling capacity ..................................... 416
No tes ................................................... 157
Purity ................................................... 41 5
Ad ditional door lo ck.................................. 62
Ad diti ves................................................... 416
Ad Blue ®
............................................... 41 5
Engine oil ............................................. 416
Fu el ...................................................... 414
Ad diti ves (engine oil)
see Additives
Ad diti ves (fuel)
see Fuel Index
497

Kickdown .............................................
15 3
Manual gearshifting ............................ .153
Selecting park position ........................ 15 2
Shifting toneutral ................................ 15 2
St eering wheel gearshift paddles ........ 15 3
Tr ansmission position display .............. 15 0
Tr ansmission positions ........................ 15 0
Au tomatic transmission
see Selector le ver
Axle load Perm issible .......................................... 41 0
Tr ailer operation .................................. 422 B
Bag hook .................................................. 104
Ball ne ck
Fo lding in/out .................................... .228
BA S (Brake Assist Sy stem) .................... .170
Battery Key ........................................................ 60
Re mo tecontrol (s tationary heater) ...... 137
Battery (vehicle) Charging .............................................. 377No
tes ................................................... 375
St arting assis tance .............................. 377
Battery (vehicle) see Vehicle battery
Belt .............................................................29
Bic ycle rack
Tr ailer operation .................................. 231
Blind Spot Assist .................................... .222
Ac tivating/deactivating ...................... .224
Fu nction/no tes ................................... 222
Sy stem limits ....................................... 222
Blind Spot Assist see Active Blind Spot Assi st
Blo wer
see Climate control
BlueTEC see AdBlue ®
Blue tooth ®
Ac tivating/deactivating ...................... .267
Setting up an Internet connection ....... 320
Settings ............................................... 267 Switching profile (DUN/PAN) .............. 321 Blue
tooth ®
Au dio
Ac tivating ............................................ 338
De-authorising (de-regis tering) the
device .................................................. 338
Information .......................................... 335
Overview .............................................3 36
Sear ching for and auth orisingthe
device .................................................. 337
Switching device via NFC .................... 338
Boot lid .......................................................67
Ac tivating/deactivating the boot lid
opening limiter ...................................... 72
Closing .................................................. 68 HANDS-FREE ACCESS .......................... .70
Loc ked separately .................................72
Opening .................................................67
Opening dimensions ............................4 19
Boot lid see Boot lid
see Locking/unlocking
Brake Assi stSystem
see BAS (Brake Assi stSystem)
Brake fluid Notes ................................................... 41 8500
Index

_Before
starting the engine, turn
th esteering wheel. .............................. 472
Blind Spot Assi stcur rently una vaila‐
ble See Owner's Manual ......................444
Blind Spot Assi stinope rative ............... 445
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...4 45
Brake immediate ly............................... 433
ÂChange key bat teries .................. 464
ØCheck AdBlue See Owne r’s
Manual ................................................ 457
JCheck brake fluid le vel................ 433
4Check eng. oil le v.when next
re fuelling ............................................. 454
jChe cktrailer hitch lo ck............... 467
hCheck tyre(s) ............................... 460
!Clean the fuel filter ...................... 457
Clutch overheated Avoid pulling away
fo r XX:XX mins ..................................... 470
É Compressor is cooling ................442?
Coolant Stop vehicle Switch
engine off ............................................ 451
Cruise contro l and Limiter inope ra‐
tive ...................................................... 449
Cruise cont rol inope rative ................... 449
Cruise cont rol off ................................ 449
! currently una vailable See Own‐
er's Manual ........................................ .425
÷cur rently una vailable See Own‐
er's Manual ........................................ .426
Depress clutch ful lyto start engine .....4 70
Dis tance Pilot available again ..............447
Dis tance Pilot cur rently una vailable
See Owner's Manual ...........................448
Dis tance Pilot inope rative ................... 448
È .................................................... 449
Ø Eng.start not possible in XXX
mi ........................................................ 458
ØEng. start not possible ................ 458 5Engine oil le
vel cannot be
measured ............................................ 456
4Engine oil le velRe duce oil le vel...4 55
4Engine oil le velSt op vehicle
Switch engine off ................................ 454
4Engine oil pressure Stop Switch
off engine ............................................ 456
6Example: Front left malfunction
Consult workshop ...............................4 37
b Example: Left dipped beam ........478
6 Example: Left windowbag mal‐
function Consult workshop ................. 437
Example: Parking Pilot Parking can‐
celled ................................................ .446
_Example: Rear left seat back‐
re st not lo cked .................................... 477
Fr ont-passenger airbag disabled See
Owner's Manual ..................................4 38
Fr ont-passenger airbag enabled See
Owner's Manual ..................................4 39506
Index

!inope
rative See Owner's Man‐
ual ....................................................... 424
÷inoperati veSee Owner's Man‐
ual ....................................................... 427
Tinoperati veSee Owner's Man‐
ual ....................................................... 428
GInoperati ve.................................. 434
bIntelli gent Light Sy stem inoper‐
ative ..................................................... 478
 Key not de tected (red displ ay
messa ge).............................................4 65
ÂKe y not de tected (white displ ay
messa ge).............................................4 64
Let fresh air into theve hicle interior!
Air conditioning malf. Visit workshop ..473
Limiter inoperative .............................. 449
Limiter passive .................................... 448
É Lowe ring .................................... 440
b Malfunction See Owner's Man‐
ual .......................................................4 78É
Malfunction See Owner's Man‐
ual .......................................................4 42
ðMaximum speed exceeded ..........4 50
N permanently active Risk of vehicle
ro lling .................................................. 468
ëOff .............................................. .447
Only select Park (P) when vehicle is
st ationary ............................................ 468
jOpe ration only possible in
transmission position N .......................471
j Operation only possible in
transmission position P .......................471
! Parking brake See Owner's
Manual ................................................ 430
Pa rking Pilot and PARKTRONIC inop‐
erative See Owner's Manual ................446
Pa rking Pilot Manoeuvring assis‐
ta nce limited See Owner's Manual ......446
 Place theke y in the mar ked
space See Owner's Manual ................. 465ÉPlease
reduce speed ...................4 42
PRE-SAFE inope rative See Owner's
Manual ................................................ 435
Ra dar sensors dirty See Owner's
Manual ................................................ 435
hRe ctify tyre pressure ................... 460
ØRe fill Ad Blue Eng. start not pos‐
sible .................................................... .457
Ø Refill Ad Blue No start in XXX mi
............................................................ .458
ØRe fill Ad Blue See Owne r’s Man‐
ual .......................................................4 56
!Re lease parking brake .................429
¸Re place air cleaner .....................458
,Re placekey See Owner's Man‐
ual ...................................................... .464
 Replace key ................................ .463
8Re servefuel le vel........................ 457
6Re stra int sys. malfunction Con‐
sult workshop ...................................... 436 Index
507