Page 435 of 482
Seat belts
Warning/indicator lamp
Possible causes/consequences and MSolutions
7
Seat beltwarning lamp
lights up Af
terst arting the engine, there d seat belt warning lamp lights up for 6 seconds.
In addition, an acou stic wa rning tone may sound.
The seat belt warning lamp reminds the driver and front passenger tofast entheir seat belts.#Fa sten your seat belt .
If yo u ha veplaced objects on the front passenger seat, thewa rning lamp may remain lit.
7
Seat belt warning lamp
fl ashes The
red seat belt warning lamp flashes and an intermitte ntwa rning tone sounds.
The driver or front passenger has not fastened their seat belt while theve hicle is in motion.#Fa sten your seat belt .
There are objects on the front passenger seat.
#Re mo vethe objects from the front passenger seat.
Display messages and warning/indicator lamps 433
Page 437 of 482
Vehicle
Wa rning/indicator lamp
Possible causes/consequences and MSolutions
Ð
Powe 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 werst eering assis tance 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 etyis jeopardized.
#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 in the multifunction displa y.
Displaymessage s andwarning/indicator lamps 435
Page 438 of 482

Engine
Warning/indicator lamp
Possible causes/consequences and MSolutions
;
Engine diagnosiswarning
lamp The
yellow engine diagnosis warning lamp is lit while the engine is running.
A malfunction has occurr ed inthe engine, theex haust sy stem or the fuel sy stem.
The emissions limit values may be exceeded and the engine may be running in emergency operation mode.
In some states, legal requ irements stipulate that you must immediately consult a qualified specialist workshop as soon
as theye llow engine diagnosis warning lamp lights up.
#Ha ve theve hicle checked as soon as possible at a qualified specialist workshop.
#
Electrical malfunction warn‐
ing lamp The
red electri cal malfunction warning lamp is lit.
There is a malfunction in the electrics.#Obser vethe messages in the multifunction displa y.
8
Fuelreser vewarning lamp The
yellow fuel reser ve wa rning lamp lights up while driving.
There has been pressure loss in the fuel sy stem. The fuel filler cap is not closed cor rectly or the fuel sy stem is leaking.#Close the fuel filler cap.
#If th e fuel filler cap was already proper lyclosed: consult a qualified specialist workshop.
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Display messages and warning/indicator lamps
Page 439 of 482
Warning/indicator lamp
Possible causes/consequences and MSolutions
8
Fuelreser ve wa rning lamp The
yellow fuel reser vewarning lamp is lit while the engine is running.
The fuel le vel has dropped into there ser verange.#Re fuel.
Display message s andwarning/indicator lamps 437
Page 440 of 482

Warning/indicator lamp
Possible causes/consequences and MSolutions
?
Coolantwarning lamp The
red coolant warning lamp is lit while the engine is running.
Po ssible causes are:RThe temp erature sensor is malfunctioning
RThe coolant le vel is too low
RThe air supply tothera diator is obstructed
RThe radiator fan is de fective
If th ere is an additional warning tone, the coolant temp erature has exceeded 248 °F (120 °C).
&
WARNING Danger of burn s when opening the hood
If yo u open the hood when the engine has overheated or during a fire inthe engine compartment, you could come
into contact with hot gases or other escaping operating fluids.
#Before opening the hood, allow the engine tocool down.
#Intheeve nt of a fire inthe engine compartment, keep the hood closed and call thefire service.
#Pull over and stop theve hicle safely and switch off the engine, paying attention toroad and traf fic conditions. Do
not continue driving under any circums tances.
#Obser vethe messages in 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.
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Display messages and warning/indicator lamps
Page 441 of 482
Warning/indicator lamp
Possible causes/consequences and MSolutions
Otherwise:
#Lea vetheve hicle and keep a safe dis tance from theve hicle until the engine has cooled down.
#Check the coolant le vel .
#Make sure that the air supply tothera diator is not obstructed.
#Av oiding high loads on the engine, drive on tothe nearest qualified specialist workshop. In doing so, ensure that the
coolant temp erature display remains below 248 °F (120 °C).
Display message s andwarning/indicator lamps 439
Page 444 of 482

1,2, 3 ...
12 V sock et
see Soc ket (12 V)
360° Camera ............................................ 181
Assigning as a favo rite ......................... 184
Care .................................................... .313
Fu nction ............................................... 181
Selecting a view ................................... 184
A
A/C function Activating/deactivating (control
panel) .................................................. 124
ABS (Anti-lock Braking Sy stem) ............ .151
Ac celeration
see Kickdown
Ac cess data
Editing ................................................ .276
Setting ................................................. 275
Ac oustic locking verification signal
Swit ching on/off .................................. .56
Ac tive Blind Spot Assi st.......................... 193
Ac tivating/deactivating .......................1 95Brake application .................................
194
Fu nction/no tes ................................... 193
Sy stem limits ....................................... 193
To wing a trailer .................................... 194
Ac tive Brake Assi st................................. 155
Fu nction/no tes ................................... 155
Setting ................................................. 159
Ac tive Eme rgency Stop Assist ...............169
Ac tive hood (pedestrian pr otection) ...... 304
Me thod of operation ............................3 04
Re setting ............................................. 304
Ac tive Lane Change Assi st..................... 169
Ac tive Lane Keeping Assist .................... 195
Fu nction .............................................. 195
Sensitivity (function/no tes) ................. 198
Setting the sensitivity ... .....
..................
198
Switching on/off ................................. 197
Sy stem limits ....................................... 195
To wing a trailer .................................... 195
Ad aptive cruise control
see Dis tance Pilot DISTRONIC
Ad aptive Highbeam Assist
Fu nction ............................................... 114 Switching on/off ..................................
115
Ad ditive s.................................................. 374
Engine oil ............................................. 374
Fu el ...................................................... 374
Ad ditive s (engine oil)
see Additives
Ad ditive s (fuel)
see Fuel
Ad dress book
see Contacts
Ad justing the balance/ fader
Burmes ter
®high-end 3D sur round
sound sy stem ...................................... 302
Burmes ter
®sur round sound sy stem ... .301
Ad justing the sound focus
Burmes ter
®sur round sound sy stem ... .301
Ad justing the sound optimization
Burmes ter
®high-end 3D sur round
sound sy stem ...................................... 302
Ad justing treble, mid and bass
Burmes ter
®high-end 3D sur round
sound sy stem ...................................... 302
44 2
Index
Page 446 of 482

Overview ............................................. 269
Sound settings .................................... 269
Trans ferred vehicle data ......................2 71
Asht ray
Fr ont center console ........................... 106
Re ar passenger compartment ............ .106
Assistance graphic
Menu (on-board computer) .................. 203
Assistance sy stems
see Driving saf etysy stem
ASS YST PLUS ........................................... 303
Battery disconnection pe riods .............3 04
Display ingthe service due date ........... 303
Fu nction/no tes ................................... 303
Re gular service work ........................... 303
Special service requirements .............. 303
ATA (Anti-Theft Alarm sy stem)
Deactivating the alarm .......................... 80
Fu nction ................................................ 79
ATA (anti-theft alarm system)
see Pr otection against theft
AT TENTION ASSIST ..........................189, 191
Ac tivating/deactivating .......................1 91Fu
nction .............................................. 189
Sy stem limitations .............................. .189
At tention assistant
see ATTENTION ASSIST
Au dio mode
Ac tivating media mode ........................ 283
Connecting USB devices ..................... 285
Co pyright ............................................. 283
Information .......................................... 281
Inserting/ removing an SD card ...........2 83
Media sea rc
h ....................................... 288
Overview ............................................. 284
Pa use an
d playback function .............. .285
Selecting a track ................................. 285
Selecting playba ckoptions .................. 285
Tr ack list .............................................. 285
Au thorized workshop
see Qualified specialist workshop
Au tomatic car wash (care) ......................3 10
Au tomatic distance control
see Dis tance Pilot DISTRONIC
Au tomatic driving lights ..........................113 Au
tomatic engine start (ECO start/
sto p function) .......................................... 134
Au tomatic engine stop (ECO start/
sto p function) .......................................... 134
Au tomatic front passen ger air bag
shu toff
see Front passenger air bag shutoff
Au tomatic mir rorfo lding function
Ac tivating/deactivating .......................1 22
Au tomatic transmission
DIRECT SELECT le ver ........................... 137
Drive program display .......................... 136
Drive programs .................................... 136
DY NA MIC SELECT switch .................... 136
Engaging drive position ....................... 139
Engaging reve rsege ar ........................ .138
Kickdown ............................................. 140
Manual gear shifting ................ ...
.........
139
Selecting pa rkposition ........................ 139
Shifting toneutral ................................ 138
St eering wheel gearshift paddles ........ .139
Tr ansmission position display .............. 137
Tr ansmission positions ........................ 137
444
Index