Engine
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
; Engine diagnosis warning
lamp The
yellow engine diagno stics warning lamp is lit while the engine is running.
A malfunction has occu rred in the engine, theex haust sy stem or the fuel sy stem.
The emissions limit value may ha vebeen exceeded and the engine may be running in eme rgency operation mode. #
Have theve hicle checked as soon as possible at a qualified specialist workshop.
Ve hicles with a diesel engine: the fuel tank may ha vebeen run dr y. #
Start the engine thre eto four times af terre fuelling.
If th eye llow engine diagnosis warning lamp goes out, emer gency operation mode is cancelled. The vehicle need not
be checked.
# Elect rical fault warning
lamp The
red elect rical fault warning lamp is lit.
There is a fault in the electrics. #
Obser vethe messages on the multifunction displa y.
8
Fu elreser ve wa rning lamp The
yellow fuel reser vewarning lamp is lit while the engine is running.
The fuel supply has dropped into there ser verange. #
Refuel. 626
Displaymessa ges and warning/indicator lamps
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
? Coolant warning lamp The
red coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The coolant le vel is too low
R The air supply tothera diator is obstructed
R The radiator fan is faulty
If th ere is an additional warning tone, the coolant temp erature has exceeded 120 °C. &
WARNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. #
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. Do not con‐
tinue driving under any circums tances. #
Obser vethe messages on the multifunction displa y.
If th e coolant temp erature display is at the lo wer end of thete mp erature scale: #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 627
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
or #
Exit theve hicle and keep a safe dis tance from it until the engine has cooled down. #
Check the coolant le vel (→ page 492). #
Make sure that the air supply tothera diator is not obstructed. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that the
coolant temp erature display remains below 120 °C. Ty
res Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
h Ty re pressure monitoring
sy stem warning lamp lights
up The
yellow tyre pressure monitoring sy stem warning lamp (pressure loss/malfunction) is lit.
The tyre pressure monitoring sy stem has de tected tyre pressure loss in at least one of the tyres. &
WARNING Risk of an accident due toinsuf ficient tyre pressure
Ty res with insuf ficient tyre pressure pose thefo llowing risks:
R The tyres may bur st, especially as the load and vehicle speed increase.
R The tyres may wearexc essively and/or une venly, which may greatly impair tyre traction.
R ‑ The driving characteristics, steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. 628
Display messages and warning/indicator lamps
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
Obser vethere commended tyre pressures. #
Adjust the tyre pressure if necessar y. #
Stop theve hicle, paying attention toroad and traf fic conditions. #
Check the tyre pressure and the tyres.
h Ty re pressure monitoring
sy stem warning lamp
fl ashes The
yellow tyre pressure monitoring sy stem warning lamp (pressure loss/malfunction) flashes for appro ximately one
minu teand then remains lit.
The tyre pressu remonitoring sy stem is faulty. &
WARNING Thereis a risk of an accident if the tyre pressure monitoring sy stem is malfunctioning
If th e tyre pressure monitoring sy stem is malfunctioning, it is not able toissue a warning if there is pressure loss in
one or more of the tyres.
Ty res with insuf ficient tyre pressure ma y,forex ample, af fect theve hicle's handling characteristics, steering and
braking. ‑ #
Have the tyre pressure monitoring sy stem checked at a qualified specialist workshop. #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 629
1,
2, 3 ...
4MATIC ..................................................... 19 9
Fu nction .............................................. 19 9
12 V battery
see Battery (vehicle)
12 V so cket
see Soc ket (12 V)
48 V on-board electrical sy stem
Operating saf ety .................................... 24
230 V soc ket
see Soc ket (230 V)
360° Camera ............................................ 271
Care .................................................... 499
Fu nction .............................................. 271
Opening the camera co ver (r eve rsing
camera) .............................................. .275
Selecting a view ................................... 274
Setting favo urites ................................ 275
Switching au tomatic operation
on/off (r eversing camera) .................. .274 A
A/C function Activating/deactivating (multimedia
sy stem) ................................................ 167
Switching on/off (control panel) .......... 167
ABS (Anti-lock Braking Sy stem) ............ .215
Ac celeration
see Kickdown
Ac cess data
Setting (Blue tooth®
) ............................ 457
Ac oustic locking verification signal
Ac tivating/deactivating ......................... 78
Ac tivating/deactivating automatic
vo lume adjustment
Burmes ter®
sur round sound sy stem ... 484
Ac tive Blind Spot Assi st......................... 286
Ac tivating/deactivating ...................... .289
Brake application ................................. 288
Fu nction .............................................. 286
Sy stem limitations ...............................2 86
AC TIVE BODY CONT ROL.......................... 253
Fr ee driving mode ...............................2 58
Individual wheel control ..................... .259 Setting
the le vel .................................. 259
Suspension .......................................... 253
Ac tive Brake Assi st
Fu nction/no tes ................................... 221
Setting .................................................2 27
Ac tive Di stance Assist DISTRO NIC........ 233
Ac tive Emergency Stop Assist .............2 42
Ac tive Lane Change Assi st................... 241
Calling up a speed .............................. .235
Displ ays in the Instrument Display ...... 24 3
Fu nction .............................................. 233
Increasing/decreasing speed .............. 235
Re quirements: .................................... .235
Ro ute-based speed adap tation ........... .238
Selecting ............................................. 235
St eering wheel buttons ....................... 235
St oring a speed ................................... 235
Switching off/deactivating .................. 235
Switching on/activating ......................2 35
Sy stem limitations ...............................2 33
Ac tive Eme rgency Stop Assist ...............242
Ac tive headlamps .................................... 15 0
Ac tive Lane Change Assi st...................... 241
Ac tivating/deactivating ...................... .242 630
Index
Fu
nction ............................................... 241
Ac tive Lane Keeping Assist .................... 289
Ac tivating/deactivating ...................... .291
Ac tivating/deactivating thewa rning .... 291
Fu nction .............................................. 289
Setting the sensitivity .......................... 291
Sy stem limitations ...............................2 89
Ac tive Parking Assist .............................. 275
Cross Traf fic Alert ............................... 280
Drive AwayAssi st................................ 279
Exiting a pa rking space ........................ 278
Fu nction .............................................. 275
Manoeuvring assis tance ...................... 280
Pa rking ................................................ 276
Sy stem limitations ...............................2 75
Ac tive Se rvice Sy stem PLUS
AS SYST PLUS ...................................... 487
Ac tive Speed Limit Assi st....................... 237
Display ................................................ 237
Fu nction .............................................. 237
Ac tive Steering Assist ............................ .239
Ac tivating/deactivating ...................... .241
Ac tive Emergency Stop Assist .............2 42
Ac tive Lane Change Assi st................... 241Displ
ays in the Instrument Display ...... 24 3
Fu nction .............................................. 239
Sy stem limitations ...............................2 39
Ac tive Traf fic Jam Assist
Fu nction .............................................. 24 3
Ad aptive brake lights .............................. 227
Ad aptive cruise control
see Active Dis tance Assi stDISTRONIC
Ad aptive functions, MULTIBEAM LED
see Intelligent Light Sy stem
Ad aptive Highbeam Assist Plus
Fu nction .............................................. 15 2
Switching on/off ................................. 15 3
Ad Blue ®
.................................................... 555
Ad ditives .............................................5 55
Capacity .............................................. 556
Consu mption ....................................... 556
Fill le vel .............................................. .305
No tes .................................................. 202
Purity ................................................... 555
Ra nge .................................................. 305
To pping up ...........................................2 03
Ad ditional door lo ck.................................. 81Ad
diti ves.................................................. 556
Ad Blue ................................................. 555
Engine oil ............................................ 556
Fu el ..................................................... 554
Ad diti ves (AdBlue ®
)
see AdBlue ®
Ad diti ves (engine oil)
see Additives
Ad diti ves (fuel)
see Fuel
Ad dress book
see Contacts
Ad justing the balance/ fader
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 486
Burmes ter®
sur round sound sy stem ... 484
Ad justing the bass, mid- range and
treble
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 485 Index
631
Ambient lighting
Setting (mutlimedia sy stem) ................1 54
Android Auto ............................................ 443
Connecting a mobile phone ................ .443
Ending ................................................. 444
Information ..........................................4 43
Overview ............................................. 443
Sound settings .................................... 444
Tr ans ferred vehicle data ......................4 44
Animals Pets in theve hicle ..................................76
Answering e-mails see In Car Of fice
Anti-lock braking sy stem
see ABS (Anti-lock Braking Sy stem)
Anti-theft alarm sy stem
see ATA (anti-theft alarm sy stem)
Anti-theft pr otection
Ad ditional door lock ...............................81
Immobiliser .........................................1 02
Anti-theft pr otection
see ATA (anti-theft alarm sy stem) Anticipatory occupant pr
otection
see PRE- SAFE®
(anticipatory occu‐
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Apple CarPlay™ ....................................... 441
Connecting an iPhone ®
...................... .442
Ending ................................................. 443
No tes .................................................. 442
Overview ..............................................4 41
Sound settings .................................... 443
Tr ans ferred vehicle data ......................4 44
Asht ray
Fr ont centre console ........................... 14 0
Assistance sy stems
see Driving saf ety sy stem
Assistant display Menu (on-board computer) .................. 305
ASS YST PLUS ........................................... 487
Battery disconnection pe riods .............4 88
Displ aying the service due date ........... 487
Fu nction/no tes ................................... 487
Re gular maintenance work .................. 487
Special service requ irements .............. 487 ATA
(anti-theft ala rmsystem) ................ .102
Deactivating the alarm ........................ 103
Fu nction .............................................. 102
Fu nction of interior pr otection .............1 04
Priming/deactivating interior pr otec‐
tion ...................................................... 104
Priming/deactivating tow- aw ay pro‐
te ction ................................................. 104
To w- aw ay protection function .............. 103
AT TENTION ASSI ST.......................... 281, 282
Fu nction .............................................. 281
Setting ................................................. 282
Sy stem limitations ...............................2 81
At tention assistant
see ATTENTION ASSIST
Au thorised workshop
see Qualified specialist workshop
Au tomatic distance control
see Active Dis tance Assi stDISTRONIC
Au tomatic driving lights .........................14 8
Au tomatic engine start (ECO start/
st op function) .......................................... 187 Index
633
Au
tomatic engine stop (ECO start/
sto p function) .......................................... 187
Au tomatic front passen ger front air‐
bag deacti vation sy stem
see Automatic front passenger front
airbag shutoff
Au tomatic front passen ger front air‐
bag shu toff .......................................... 42, 44
Fu nction of the automatic front
passenger front airbag deactivation
sy stem ................................................... 42
PA SSENGER AIR BAG indicator lamp .... .44
Au tomatic mir rorfo lding function
Ac tivating/deactivating ...................... .163
Au tomatic seat adjustment
Setting ................................................. 11 4
Au tomatic transmission
DIRECT SELECT le ver ........................... 19 3
Drive program display .......................... 191
Drive programs .................................... 19 0
DY NA MIC SELECT switch .................... 19 0
Engaging drive position ........................ 194
Engaging neutral .................................. 194
Engaging pa rkposition ........................ 194Engaging
reve rsege ar ........................ .194
Kickdown ............................................. 19 6
Manual gear changing ........................ .195
St eering wheel gearshift paddles ........ .195
Tr ansmission position display .............. 19 3
Tr ansmission positions ........................ 19 3
Axle load Perm issible .......................................... 550
Tr ailer operation .................................. 565 B
Bag hook .................................................. 13 5
Baidu CarLife Trans ferred vehicle data ......................4 44
Ball ne ck
Extending/r etra cting ........................... 292
BA S (Brake Assist Sy stem) .................... .215
Battery Key ........................................................ 79
Re mo tecontrol (s tationary heater) ...... 174
Battery see Battery (vehicle) Battery (vehicle)
....................................... 517
Charging .............................................. 516
No tes ................................................... 512
No tes (s tarting assis tance and
ch arging) .............................................. 514
Re placing .............................................5 17
St arting assis tance .............................. 516
Belt see Seat belt
Bic ycle rack
Tr ailer operation .................................. 296
Blind Spot Assist .................................... .286
Ac tivating/deactivating ...................... .289
Fu nction .............................................. 286
Sy stem limitations ...............................2 86
Blo wer
see Climate control
BlueTEC see AdBlue ®
Blue tooth ®
............................................... 369
Information .......................................... 368
Setting up an Internet connection ....... 457
Switching on/off ................................. 369 634
Index