
Display messages
Possible causes/consequences and M
MSolutions
j Check trailer hitch lock *T
he trailer hitch is not operational. &
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. #
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. #
Uncouple the trailer and safeguard it against rolling away. #
Initiate a new swivelling procedure . #
When the display message disappears, couple up the trailer and drive on.
If th e display message does not disappear, the trailer hitch is defective and the ball neck is not loc ked. #
Do not couple up the trailer. Drive on without the trailer. Pay attention tothere duced ground clearance due to
th e unloc ked ball nec k. #
Consult a qualified specialist workshop.
Apply brake to deselect
Park (P) position *
Yo u ha veattem ptedto shift the transmission out of position jand into ano ther transmission position. #
Depress the brake pedal. Display messages and
warning/indicator lamps 467

Display messages
Possible causes/consequences and M
MSolutions
_ Before starting the engine,
turn the steering wheel. *
Ve hicles with manual transmission: the electric steering lock was unable tounlo ckthesteering. #
Switch the ignition off. #
Tounlo ckthesteering, mo vethesteering wheel slightly tothe left and right. #
Switch the ignition back on.
Ð Steering malfunction See
Owner's Manual *
Ve hicles with manual transmission: The electricsteering lock is malfunctioning. The steering may be loc kedby
th e electric steering loc k. &
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. #
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. 472
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
M *T
he engine bonnet is open. &
WARNING Risk of accident due todriving with the engine bonn etunlo cked
An unloc ked engine bonn etmay open up when theve hicle is in motion and block your vie w. #
Never unlock the engine bonn etwhen driving. #
Before every trip, ensure that the engine bonn etis loc ked. #
Pull over and stop theve hicle safely as soon as possible. #
Close the engine bonn et.
C *A
t least one door is open. #
Close all doors. 476
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
N *T
he boot lid is open. &
WARNING Risk ofexhaust gas poisoning
Combustion engines emit poisonous exhaust gases such as carbon monoxide. Exhaust gases can enter the
ve hicle interior if the boot lid is open when the engine is running, especially if theve hicle is in motion. #
Alw ays switch off the engine before opening the boot lid. #
Never drive with the boot lid open. #
Close the boot lid.
_ Example:Rear left seat
backrest not locked *T
he cor responding seat backrest of there ar ben chseat is not engaged. #
Foldthe cor responding seat backrest back until it engages.
¥
Top up washer fluid *T
hewasher fluid le vel in thewa sher fluid reser voir has dropped below the minimum. #
Top up thewa sher fluid . Display messages and
warning/indicator lamps 477

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
J Brake sy stem warning lamp The
red brake sy stem warning lamp is lit while the engine is running.
Po ssible causes:
R The brake forc e boosting is malfunctioning and the braking characteristics may be af fected.
R The reis insuf ficient brake fluid in the brake fluid reser voir. &
WARNING Thereis a risk of an accident if brake forc e boosting is malfunctioning
If brake forc e boosting is malfunctioning, the wheels may lock when braking. Braking characteristics may be
impaired. The braking dis tance may increase in an eme rgency braking situation. #
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. &
WARNING Risk of an accident due tolow brake fluid le vel
If th e brake fluid le vel is too lo w,the braking ef fect and the braking characteristics may be impaired. #
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.
Do not top up the brake fluid. Display messages and
warning/indicator lamps 483

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
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. #
Obser vethe messages in the multifunction displa y. #
Consult a qualified specialist workshop.
! ABS warning lamp The
yellow ABS warning lamp is lit while the engine is running.
ABS is malfunctioning.
If th ere is an additional acoustic warning signal, EBD is malfunctioning.
Other driving sy stems and driving saf ety sy stems may also be faulty. &
WARNING Thereisrisk of skidding if EBD or ABS is malfunctioning
If EBD or ABS is malfunctioning, the wheels could lock when braking
The steering capability and braking characteristics are thus se verely impaired. The braking dis tance may increase in
an emergency braking situation. In addition, other driving saf ety sy stems are switched off. #
Drive on carefull y. #
Have the brake sy stem checked immediately at a qualified specialist workshop. #
Drive on carefully. #
Obser vethe messages in the multifunction displa y. #
Consult a qualified specialist workshop. 484
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

Ad
dress book
see Contacts
Ad justing the balance/ fader
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 350
Burmes ter®
sur round sound sy stem ... 350
Ad justing the sound focus
Burmes ter®
sur round sound sy stem ... 350
Ad justing the sound optimisation
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 351
Ad justing treble, mid and bass
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 350
ADS PLUS damping sy stem
see AIR BODY CONTROL
Ad versewe ather light ............................ .118
Af ter-sales service centre
see ASS YST PLUS
AIR BODY CONT ROL................................ 19 5
Setting ................................................. 19 6
Suspension .......................................... 19 5Air conditioning sy
stem
see Climate control
Air distribution ........................................ 12 9
Air freshener sy stem
see Frag rance sy stem
Air suspension see AIR BODY CONTROL
Air vents ................................................... 13 8
Ad justing (front) .................................. 13 8
Ad justing (rear) .................................... 13 9
Glo vebox .............................................1 39
Air vents
see Air vents
Ai r-re circulation mode ............................ 13 2
Airbag Activation .............................................. 28
Fr ont airbag ...........................................34
Ins tallation locations ............................ .34
Knee airbag ........................................... 34
Overview ............................................... 34
Pr otection ..............................................35
Re duced pr otection ...............................36
Side impact airbag ................................ 34 Wi
ndow airbag ....................................... 34
Ai rflow ...................................................... 12 9
Alarm see Panic alarm
Alarm sy stem
see Anti- theft pr otection
Alternative route
see Route
Ambient lighting ...................................... 121
Android Auto ............................................ 312
Connecting a mobile phone ................ .312
Ending ................................................. .312
Overview ..............................................3 12
To ne settings ....................................... 312
Tr ans ferred vehicle data ....................... 313
Animals Pets in theve hicle ................................. 57
Anti-lock braking sy stem
see ABS (Anti-lock Braking Sy stem)
Anti-theft alarm sy stem
Anti- theft pr otection .............................. 82 498
Index