Page 538 of 609

Display messages
Possible causes/consequences and 0050
0050Solutions
, Replace key See Owner's
Manual *
Ve hicles with a digital vehicle key:only a few or no authorisations remain forst arting the engine. 0007
Make sure that the internet connection is not limited bycer tain mobile phone settings. 0007
Open the Mercedes me connect http://www.mercedes.me and call up the digital vehicle key service. 0007
Deactivate the service firs t and then activate it again. 0007
Ifth e display message still appears, con tact the Mercedes-Benz Cus tomer Assis tance Center (C AC).
Ve hicles with a digital vehicle keyst icke r:on lyafe w or no authorisations remain forst arting the engine. 0007
Order a new digital vehicle keyst icke r from a Mercedes-Benz Service Centre or at http://www.mercedes-
benz.com/connect. Ve
hicle Display messages
Possible causes/consequences and 0050 0050Solutions
00CA Trailer coupling extending… *E
xtending or retracting the ball nec k.
Do not attem pttospeed up, slow down or initiate there tracting or extending process using your hand, foot or other
aids. During there tracting or extending process, do not couple a traile r.
When the ball neck has reached an operational position, the display message disappears.
00CA *
Yo u ha veattem pted todisplace the ball neck and the transmission is in position 005E,005Cor005B. 0007
Depress the brake pedal. 0007
Shift the transmission toposition 005D. Display messages and
warning/indicator lamps 535
Page 558 of 609

Wa
rning/indicator lamp
Possible causes/consequences and 0050
0050Solutions 000A
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. 0007
Before opening the bonn et, allow the engine tocool down. 0007
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. 0007
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. 0007
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: 0007
Consult a qualified specialist workshop.
or 0007
Exit theve hicle and keep a safe dis tance from it until the engine has cooled down. 0007
Check the coolant le vel (0013 page413). 0007
Make sure that the air supply tothera diator is not obstructed. 0007
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. Displ
aymessa ges and warning/indicator lamps 555
Page 564 of 609

Ad
justing treble, mid- range and bass
settings
Burmes ter®
sur round sound sy stem ... 404
ADS PLUS damping sy stem
see AIRMATIC
Ad versewe ather light ............................ .140
Af ter-sales service centre
see ASS YST PLUS
Air conditioning sy stem
see Climate control
Air distribution Setting ................................................ .155
Air freshener sy stem
see Fragrance sy stem
Air inlet see Air-water duct
Air pressure see Tyre pressure
Air suspension see AIRMATIC
Air vents ................................................... 16 5
Ad justing (front) .................................. 16 5Ad
justing (rear) .................................... 16 5
Air vents
see Air vents
Ai r-re circulation mode ............................ 15 8
Air-water duct .......................................... 414
Ke eping free ......................................... 414
Airbag ........................................................ .39
Ac tivation .............................................. 33
Fr ont airbag (driver, front passenger) ....39
Ins tallation locations ............................ .39
Knee airbag ........................................... 39
Overview ............................................... 39
PA SSENGER AIR BAG indicator lamp .... .43
Pr otection ..............................................39
Re duced pr otection ...............................41
Side impact airbag ................................ 39
Wi ndow airbag ....................................... 39
Ai rflow
Setting ................................................ .155
AIRMATIC ................................................. 232
Setting ................................................. 234
Suspension .......................................... 232
AIRPANEL (Care) ...................................... 420 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 44
Android Auto ............................................ 362
Connecting a mobile phone ................. 363
Ending ................................................. 364
Information .......................................... 363
Overview ............................................. 362
Sound settings .................................... 364
Tr ans ferred vehicle data ......................3 64
Animals Pets in theve hicle ..................................71
Anti-lock braking sy stem
see ABS (Anti-lock Braking Sy stem)
Anti-skid chains
see Snow chains Index
561