2020 MERCEDES-BENZ S-CLASS SALOON LONG lights

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
ü Seat belt warning lamp
fl ashes *T
he red seat belt warning lamp flashes and an intermit tent wa rning tone sounds.
The driver or front passenger has not fastened his/her seat belt while theve hicle is in motion. #
Fasten your seat belt (/ page 45).
There are objects on the front passenger seat. #
Remo vethe objects from the front passenger seat.
ü
Seat belt warning lamp
lights up *T
he red seat belt warning lamp lights up once the engine has star ted.
In addition, an intermittent warning tone may sound.
The red seat belt warning lamp reminds the driver and front passenger tofasten their seat belts. #
Fasten your seat belt (/ page 45).
If yo u ha veplaced objects on the front passenger seat, there d seat belt warning lamp may remain lit. Ve
hicle Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
ï Tr ailer tow hit chwarning
lamp *T
hered trailer hitch warning lamp is lit.
The trailer hitch is not operational or is swivelling. &
WARNING Risk of an accident if the ball neck is not loc ked
The trailer may become de tach ed. 552
Display messages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
; Engine diagnosis warning
lamp *T
he yellow engine diagno stics warning lamp is lit while the engine is running.
A malfunction has occu rred in the engine, theex haust sy stem or the fuel sy stem.
The emissions limit value may ha vebeen exceeded and the engine may be running in emergency operation mode. #
Have theve hicle checked as soon as possible at a qualified specialist workshop.
Ve hicles with a diesel engine: the fuel tank may ha vebeen run dr y. #
Start the engine thre eto four times af terre fuelling.
If th eye llow engine diagnosis warning lamp goes out, emer gency operation mode is cancelled. The vehicle need
not be checked.
#
Elect rical fault warning
lamp *T
hered elect rical fault warning lamp is lit.
There is a fault in the electrics. #
Notethe messages on the driver's displa y.
8
Fu elreser ve wa rning lamp
lights up *T
he yellow fuel reser vewarning lamp lights up while the engine is running.
The fuel supply has dropped into there ser verange. #
Refuel. Displ
aymessa ges and warning/indicator lamps 557

Brakes
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
! Elect ric pa rking brake indi‐
cator lamp (red)
!
The elect ric pa rking brake
(yellow) indicator lamp *T
he red elect ric pa rking brake indicator lamp flashes or is lit.
The yellow elect ric pa rking brake indicator lamp also lights up in theev ent of a malfunction. #
Notethe messages on the driver's displa y.
J
Brake sy stem warning lamp
(yellow) *T
he yellow brake sy stem warning lamp is lit while the engine is running. &
WARNING Risk of an accident due toa brake sy stem malfunction
If th e brake sy stem is malfunctioning, braking characteristics may be impaired. #
Drive on carefull y. #
Have the brake sy stem checked immediately at a qualified specialist workshop. The hill
start assist may be malfunctioning. #
Adjust your speed and drive on carefull y,leaving a suitable dis tance totheve hicle in front. 558
Display messages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
Consult a qualified specialist workshop. #
Do not top up the brake fluid. Driving sy
stems Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
L Wa rning lamp for dis tance
wa rning function *T
he red dis tancewarning lamp lights up while theve hicle is in motion.
The dis tance totheve hicle in front is too small forth e speed selected.
If th ere is an additional warning tone, you are approaching an obs tacle at too high a speed. #
Be prepared tobrake immediatel y. #
Increase the dis tance.
Fu nction of Active Brake Assi st (/ page 243).
ä Suspension warning lamp
(yellow) *T
heyellow AIRMATIC warning lamp is lit.
A fault has occur red in AIRMATIC. #
Notethe messages on the driver displa y.560
Display messages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
÷ ESP ®
wa rning lamp lights
up *
The yellow ESP ®
wa rning lamp is lit while the engine is running.
ESP ®
is malfunctioning.
Other driving sy stems and driving saf ety sy stems (e.g. BAS) may also be malfunctioning. #
Comp ly wi th th e messages on the driver's displa y. &
WARNING Risk of skidding if ESP ®
is malfunctioning
If ESP ®
is malfunctioning, ESP ®
cannot car ryout vehicle stabilisation. In addition, other driving saf ety sy stems
are switched off. #
Drive on carefull y. #
Have ESP ®
ch ecked at a qualified specialist workshop. å
ESP ®
OFF warning lamp *
The yellow ESP ®
OFF warning lamp is lit while the engine is running.
ESP ®
is deacti vated.
Other driving sy stems and driving saf ety sy stems may also be inoperative. &
WARNING Risk of skidding when driving wi thESP ®
deacti vated
ESP ®
does not act tostabilise theve hicle. The availability of fur ther driving saf ety sy stems is also limited. #
Drive on carefull y. #
Deactivate ESP ®
only for as long as the situation requ ires. Display messages and
warning/indicator lamps 563

Ty
re pressure moni tor Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
h Ty re pressure monitoring
sy stem warning lamp
fl ashes *The
yellow tyre pressure monitor warning lamp (pressure loss/malfunction) flashes for appro ximately one minu te
and then remains lit.
The tyre pressu remonitor is malfunctioning. &
WARNING Thereis a risk of an accident if the tyre pressure monitoring sy stem is malfunctioning
The tyre pressure monitoring sy stem cann otissue a warning if there is pressure loss in one or more of the tyres.
Ty res with insuf ficient tyre pressure may impair the driving characteristics as well as steering and braking. #
Have the tyre pressure monitoring sy stem checked at a qualified specialist workshop. h
Ty re pressure monitoring
sy stem warning lamp lights
up *T
he 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
R The tyres can bu rst.
R The tyres can wearexc essively and/or une venly.
R The driving characteristics as well as thesteering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. #
Obser vethere commended tyre pressures. Display messages and
warning/indicator lamps 565

Ac
tive Lane Keeping Assist
Ac tivating/deactivating......................... 257
Ac tivating/deactivating thewa rning.....2 57
Fu nction................................................ 255
Setting the sensitivity............................2 57
Sy stem limits.........................................2 55
Tr ailer operation.................................... 255
Ac tive Parking Assist
Cross traf fic wa rning............................. 281
Drive AwayAssi st.................................. 280
Exiting a pa rking space......................... .275
Fu nction................................................ 271
Manoeuvring brake function.................. 281
Pa rking................................................. .273
Sy stem limitations................................. 271
Ac tive Se rvice Sy stem PLUS
see AS SYST PLUS
Ac tive Speed Limit Assi st
Displ ay.................................................. 234
Fu nction................................................ 234
Ac tive Steering Assist
Ac tivating/deactivating......................... 239
Ac tive Emergency Stop Assis t............... 239
Ac tive Lane Change Assi st.................... 24 0Fu
nction................................................ 237
Sy stem limits.........................................2 37
Ac tive Traf fic Jam Assist
Fu nction................................................ 236
Ad aptive brake lights................................ 226
Ad aptive cruise control
see Active Dis tance Assi stDISTRONIC
Ad aptive Highbeam Assist Plus
Fu nction................................................ 15 9
Switching on/of f................................... 16 0
Ad Blue ®
Ad ditives...............................................4 84
Capacity................................................ 485
No tes....................................................2 09
Purity..................................................... 484
To pping up............................................. 210
Ad ditional door lo ck.................................... 81
Ad diti ves
Ad Blue ®
................................................ 484
Engine oil.............................................. 485
Fu el....................................................... 482
Ad diti ves (AdBlue ®
)
see AdBlue ® Ad
diti ves (engine oil)
see Additives
Ad diti ves (fuel)
see Fuel
ADS PLUS damping sy stem
see AIRMATIC
Af ter-sales service centre
see ASS YST PLUS
Air conditioning menu Calling up............................................... 174
Air distribution Setting................................................... 172
Setting (MBUX multimedia sy stem)........ 174
Air freshener sy stem
see Frag rance sy stem
Air inlet see Air-water duct
Air pressure see Tyre pressure
Air suspension see AIRMATIC
Air vents
Ad justing (front).................................... 185568
Index

Priming/deactivating
tow- aw ay pro‐
te ction................................................... 105
To w- aw ay protection function................1 05
AT TENTION ASSI ST
Setting................................................... 228
Sy stem limits.........................................2 26
AT TENTION ASSI STwith microsleep
de tection
Fu nction................................................ 226
At tention assistant
see ATTENTION ASSIST with micro‐
sleep de tection
Au gmented reality
Fu nction on the head-up displa y............ 294
Au thorised workshop
see Qualified specialist workshop
Au tomatic distance control
see Active Dis tance Assi stDISTRONIC
Au tomatic driving lights ...........................15 3
Au tomatic engine start (ECO start/
sto p function)............................................ 19 6
Au tomatic engine stop (ECO start/
sto p function)............................................ 19 6Au
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
Fu nction of the automatic front
passenger front airbag deactivation
sy stem..................................................... 50
PA SSENGER AIR BAG indicator lamp....... 52
Au tomatic lateral support adjustment
Setting................................................... 12 3
Au tomatic measures af ter an accident..... 56
Au tomatic mir rorfo lding function
Ac tivating/deactivating......................... 17 0
Au tomatic seat adjustment
Setting................................................... 12 2
Au tomatic transmission
DIRECT SELECT le ver............................. 201
Drive program displa y........................... 200
Drive programs...................................... 19 9
DY NA MIC SELECT button......................1 99
Engaging drive position......................... 203
Engaging neutral................................... 202 Engaging park position.......................... 203
Engaging
reve rsege ar........................... 202
Kickdown............................................. .205
Manual gear changing.......................... .204
St eering wheel gearshift paddles.......... 204
Tr ansmission position displa y................ 201
Tr ansmission position s.......................... 201
Axle load Perm issible............................................ 478
Tr ailer operation.................................... 491 B
Bad weather light...................................... 157
Bag hook.................................................... 13 9
Ball ne ck
Extending/r etra cting............................ .283
Extending/r etra cting (MBUX multi‐
media sy stem)....................................... 285
BA S (Brake Assist Sy stem)....................... 222
Battery Remo tecontrol (s tationary heater)........ 183
Battery see Battery (vehicle) 57 0
Index