Page 540 of 589

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. #
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 537
Page 542 of 589

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. #
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. Display messages and
warning/indicator lamps 539
Page 546 of 589

Ad
justing the sound optimisation
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 386
Ad justing treble, mid- range and bass
settings
Burmes ter®
high-end 3D sur round
sound sy stem ...................................... 385
Burmes ter®
sur round sound sy stem ... 384
ADS PLUS damping sy stem
see AIR BODY CONTROL
Ad versewe ather light ............................ .127
Af ter-sales service centre
see ASS YST PLUS
AIR BODY CONT ROL................................ .210
Setting ................................................. 212
Suspension .......................................... 210
Air conditioning sy stem
see Climate control
Air distribution Setting ................................................ .137
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 ................................................... 147
Ad justing (front) ................................... 147
Ad justing (rear) .................................... 147
Glo vebox .............................................1 48
Air vents
see Air vents
Ai r-re circulation mode ............................ 14 0
Air-water duct .......................................... 395
Ke eping free ........................................3 95
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 ................................................ .137
AIRPANEL (Care) ...................................... 400
Alarm see Panic alarm
Alarm sy stem
see ATA (anti-theft alarm sy stem)
Alternative route
see Route
Ambient lighting Setting (mutlimedia sy stem) ................1 30
Android Auto ............................................ 343
Connecting a mobile phone ................. 344
Ending ................................................. 344
Information .......................................... 343
Overview ............................................. 343
Sound settings .................................... 344
Tr ans ferred vehicle data ......................3 45
Animals Pets in theve hicle ................................. 65 Index
543