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Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions &
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. #
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. 542
Displaymessa ges and warning/indicator lamps
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Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
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. Ve
hicle Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
Ð Po we rst eering sy stem
wa rning lamp The
red po werst eering sy stem warning lamp is lit while the engine is running.
The po wer-assis tedsteering or thesteering itself is malfunctioning. &
WARNING Risk of accident if steering capability is impaired
If th esteering does not function as intended, theve hicle's operating saf ety is jeopardised. #
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. #
Obser vethe messages on the multifunction displa y. Displ
aymessa ges and warning/indicator lamps 543
Page 547 of 593
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
ï Tr ailer tow hit chwarning
lamp The
red trailer tow hit chwarning lamp is on.
The trailer tow hit chis not operational or swivels. &
WARNING Risk of an accident if the ball neck is not loc ked
If th e ball neck is not in the loc ked position, the trailer may come loose. #
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. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivelling procedure and do not re-couple the trailer until the display message disappears. #
Obser vethe messages on the multifunction displa y.
If th e trailer hitch swivels: #
Wait until the ball coupling has reached the operational position. 544
Displaymessa ges and warning/indicator lamps
Page 548 of 593

1,
2, 3 ...
4MATIC ..................................................... 175
Fu nction ............................................... 175
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 .................................... 21
360° Camera .......................................... .228
Fu nction .............................................. 228
Opening the camera co ver (r eve rsing
camera) .............................................. .231
Selecting a view ................................... 231
Setting favo urites ................................ 232
Swit ching automatic operation
on/off (r eversing camera) .................. .231 A
A/C function Activating/deactivating (multimedia
sy stem) ................................................ 147
Switching on/off (control panel) .......... 147ABS (Anti-lock Braking Sy
stem) ............ .190
Ac celeration
see Kickdown
Ac cess data
Editing (Blue tooth®
) .............................3 67
Setting (Blue tooth®
) ............................ 366
Ac cident and breakdown manage‐
ment
Mercedes me connect ........................ .360
Ac oustic locking verification signal
Ac tivating/deactivating ......................... 72
Ac tivating/deactivating automatic
vo lume adjustment
Burmes ter®
sur round sound sy stem ... 398
Ac tive Blind Spot Assi st.......................... 247
Ac tivating/deactivating ...................... .250
Brake application ................................. 24 8
Fu nction .............................................. 247
Sy stem limitations ...............................2 47
Tr ailer operation .................................. 24 8
Ac tive bonn et(pedestrian pr otection) ...4 01
Operation ............................................ 401
Re setting ............................................. 401 Ac
tive Brake Assi st
Fu nction/no tes ................................... 19 6
Setting ................................................. 200
Ac tive Di stance Assist DISTRO NIC........ 205
Ac tive Emergency Stop Assist .............. 214
Ac tive Lane Change Assi st................... 213
Calling up a speed .............................. .207
Displ ays in the instrument display .......2 15
Fu nction .............................................. 205
Increasing/decreasing speed .............. 207
Re quirements: .................................... .207
Ro ute-based speed adap tation ........... .209
Selecting ............................................. 207
St eering wheel buttons ........................ 207
St oring a speed ................................... 207
Switching off/deactivating .................. 207
Switching on/activating ......................2 07
Sy stem limitations ...............................2 05
Ac tive Eme rgency Stop Assist ................ 214
Ac tive headlamps .................................... 131
Ac tive Lane Change Assi st...................... 213
Ac tivating/deactivating ...................... .214
Fu nction ............................................... 213 Index
545
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Ac
tive Lane Keeping Assist .................... 250
Ac tivating/deactivating ...................... .252
Fu nction .............................................. 250
Sy stem limitations ...............................2 50
Ac tive Parking Assist .............................. 232
Cross Traf fic Alert ................................ 24 2
Drive AwayAssi st................................ 24 2
Exiting a pa rking space ...................... .235
Fu nction .............................................. 232
Manoeuvring assi stance ...................... 24 3
Pa rking ................................................ 233
Sy stem limitations ...............................2 32
Ac tive Se rvice Sy stem PLUS
see AS SYST PLUS
Ac tive Speed Limit Assi st....................... 208
Display ................................................ 208
Fu nction .............................................. 208
Ac tive Steering Assist ............................ .211
Ac tivating/deactivating ...................... .213
Ac tive Emergency Stop Assist .............. 214
Ac tive Lane Change Assi st................... 213
Displ ays in the instrument display .......2 15
Fu nction ............................................... 211
Sy stem limitations ...............................2 11Ad
aptive brake lights .............................. 201
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 .............................................. 13 3
Switching on/off ................................. 13 4
Ad Blue ®
.................................................... 470
Ad ditives .............................................. 470
Capacity .............................................. 470
Fill le vel .............................................. .265
No tes ................................................... 178
Purity ................................................... 470
Ra nge .................................................. 265
To pping up ...........................................1 79
Ad ditional door lo ck.................................. 75
Ad ditional value range
Setting display content ........................ 263
Ad diti ves.................................................. 471
Ad Blue ®
............................................... 470
Engine oil ............................................. 471
Fu el ..................................................... 468 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 ...................................... 399
Burmes ter®
sur round sound sy stem ... 398
Ad justing the bass, mid- range and
treble
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 399
Ad justing the mid- range, treble and
bass
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 399
Ad justing the sound focus
Burmes ter®
sur round sound sy stem ... 398 546
Index
Page 550 of 593

Ad
justing the sound optimisation
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 399
Ad justing treble, mid- range and bass
settings
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 399
Burmes ter®
sur round sound sy stem ... 398
ADS PLUS damping sy stem
see AIR BODY CONTROL
Ad versewe ather light ............................ .133
Af ter-sales service centre
see ASS YST PLUS
AIR BODY CONT ROL................................ .218
Setting ................................................. 220
Suspension .......................................... 218
Air conditioning sy stem
see Climate control
Air distribution Setting ................................................ .145
Air freshener sy stem
see Frag rance sy stem Air inlet
see Air-water duct
Air pressure see Tyre pressure
Air suspension see AIR BODY CONTROL
Air vents ................................................... 15 5
Ad justing (front) .................................. 15 5
Ad justing (rear) .................................... 15 5
Ad justing the AIRSCARF vents ............. 15 6
Glo vebox .............................................1 56
Air vents
see Air vents
Ai r-re circulation mode ............................ 14 8
Air-water duct .......................................... 408
Ke eping free ........................................4 08
Airbag ........................................................ .38
Ac tivation .............................................. 31
Fr ont airbag (driver, front passenger) ....38
Ins tallation locations ............................ .38
Knee airbag ........................................... 38
Overview ............................................... 38
PA SSENGER AIR BAG indicator lamp .... .42Pr
otection ..............................................38
Re duced pr otection ...............................40
Side impact airbag ................................ 38
Wi ndow airbag ....................................... 38
Ai rflow
Setting ................................................ .145
AIRSCARF Adjusting the outlets ........................... 15 6
Switching on/off ................................. 108
Alarm see Panic alarm
Alarm sy stem
see ATA (anti-theft alarm sy stem)
All-wheel drive see 4MATIC
Alternative route
see Route
Ambient lighting Setting (multimedia sy stem) ................1 35
Android Auto ............................................ 356
Connecting a mobile phone ................. 356
Ending ................................................. 357
Information .......................................... 356 Index
547
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Overview ............................................. 356
Sound settings .................................... 357
Tr
ans ferred vehicle data ......................3 57
Animals Pets in theve hicle ................................. 70
Anti-lock braking sy stem
see ABS (Anti-lock Braking Sy stem)
Anti-skid chains
see Snow chains
Anti-theft ala rmsystem
see ATA (anti-theft alarm sy stem)
Anti-theft pr otection
Ad ditional door lock .............................. 75
Immobiliser ...........................................95
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™ ....................................... 354
Connecting an iPhone ®
....................... 355 Ending .................................................3
55
No tes .................................................. 355
Overview ............................................. 354
Sound settings .................................... 355
Tr ans ferred vehicle data ......................3 57
Asht ray
Fr ont centre console ........................... 12 3
Re ar passenger compartment ............ .123
Assistance sy stems
see Driving saf ety sy stem
Assistant display Menu (on-board computer) .................. 265
ASS YST PLUS ........................................... 400
Battery disconnection pe riods .............4 01
Displ aying the service due date ........... 400
Fu nction/no tes ................................... 400
Re gular maintenance work .................. 400
Special service requ irements .............. 400
ATA (anti-theft ala rmsystem) .................. 95
Deactivating the alarm .......................... 96
Fu nction ................................................ 95
Fu nction of interior pr otection ............... 96
Priming/deactivating interior pr otec‐
tion ........................................................ 97Priming/deactivating
tow- aw ay pro‐
te ction ................................................... 96
To w- aw ay protection function ................96
AT TENTION ASSI ST.......................... 243, 24 4
Fu nction .............................................. 24 3
Setting ................................................. 24 4
Sy stem limitations ...............................2 43
At tention assistant
see ATTENTION ASSIST
Au dio mode
Connecting USB devices ...................... 376
Copyrights .......................................... .373
Information ..........................................3 72
Inserting/removing an SD card ........... 374
Media sear ch....................................... 379
Overview ..............................................3 75
Pa use and playback function .............. .376
Selecting a track .................................. 376
Selecting pl ayback options .................. 376
Switching on media mode .................... 374
Tr ack list .............................................. 376
Au thorised workshop
see Qualified specialist workshop 548
Index
Page 552 of 593

Au
tomatic distance control
see Active Dis tance Assi stDISTRONIC
Au tomatic driving lights .........................12 9
Au tomatic engine start (ECO start/
sto p function) .......................................... 16 5
Au tomatic engine stop (ECO start/
sto p function) .......................................... 16 5
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 .......................................... 40, 42
Fu nction of the automatic front
passenger front airbag deactivation
sy stem ................................................... 40
PA SSENGER AIR BAG indicator lamp .... .42
Au tomatic mir rorfo lding function
Ac tivating/deactivating ...................... .142
Au tomatic transmission
DIRECT SELECT le ver ........................... 171
Drive program display .......................... 17 0
Drive programs .................................... 16 9DY
NA MIC SELECT switch .................... 16 9
Engaging drive position ........................ 172
Engaging neutral .................................. 172
Engaging pa rkposition ........................ 172
Engaging reve rsege ar ........................ .172
Kickdown ............................................. 174
Manual gear changing .......................... 173
St eering wheel gearshift paddles ........ .173
Tr ansmission position display .............. 171
Tr ansmission positions ........................ 171
Axle load Perm issible .......................................... 463
Tr ailer operation .................................. 477 B
Bag hook ................................................... 11 8
Ball ne ck
Fo lding out/in .................................... .254
BA S (Brake Assist Sy stem) .................... .191
Battery Charging (Remo teOnline) .................... 16 2
Ke y ........................................................ 73
Re mo tecontrol (s tationary heater) ...... 15 3Battery
see Battery (vehicle)
Battery (vehicle) ...................................... 431
Charging .............................................. 430
Charging (Remo teOnline) .................... 16 2
No tes .................................................. 426
No tes (s tarting assis tance and
ch arging) ............................................ .428
Re placing .............................................4 31
St arting assis tance .............................. 430
Belt see Seat belt
Bic ycle rack
Tr ailer operation .................................. 257
Blind Spot Assist .................................... .247
Ac tivating/deactivating ...................... .250
Fu nction .............................................. 247
Sy stem limitations ...............................2 47
Blo wer
see Climate control
BlueTEC see AdBlue ® Index
549