check engine MERCEDES-BENZ E-CLASS CABRIOLET 2018 Owner's Manual

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
6 Re stra int sy stem warning
lamp The
redre stra int sy stem warning lamp is lit while the engine is running.
The restra int sy stem is faulty (→ page31). &
WARNING Risk of inju ryor fata l injury due toa malfunction in there stra int sy stem
If th ere stra int sy stem is malfunctioning, restra int sy stem components may be triggered unintentionally or might not
be triggered at all in theeve nt of an accident. This may af fect the seat belt tensioner or airbag, forex ample. #
Have there stra int sy stem checked and repaired immediately at a qualified specialist workshop. #
Drive on carefully. #
Obser vethe messages on the multifunction displa y. #
Consult a qualified specialist workshop immediatel y.Seat belt
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
7 Seat belt warning lamp
fl ashes The
red seat belt warning lamp flashes and an intermit tent wa rning tone sounds.
The driver or front passenger has not fastened their seat belt while theve hicle is in motion. #
Fasten your seat belt(→ page 36).
There are objects on the front passenger seat. #
Remo vethe objects from the front passenger seat. 532
Display messages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
Incre asethe dis tance.
Fu nction of Active Brake Assi st .Engine
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
; Engine diagnosis warning
lamp The
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 eme rgency 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 The
red elect rical fault warning lamp is lit.
There is a fault in the electrics. #
Obser vethe messages on the multifunction displa y.534
Display messages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
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.
or #
Exit theve hicle and keep a safe dis tance from it until the engine has cooled down. #
Check the coolant le vel (→ page 398). #
Make sure that the air supply tothera diator is not obstructed. #
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. 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. 536
Display messages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
Ty res with insuf ficient tyre pressure ma y,forex ample, af fect theve hicle's handling characteristics, steering and
braking. ‑ #
Have the tyre pressure monitoring sy stem checked at a qualified specialist workshop. #
Consult a qualified specialist workshop. Ve
hicle Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
Ð Po we 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 wer-assis tedsteering 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 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. #
Obser vethe messages on the multifunction displa y.538
Display messages and warning/indicator lamps

COMAND Online
see Multimedia sy stem
COMAND Touch
Managing devices ................................ 295
Combination switch ................................12 9
Compass .................................................. 329
Compu ter
see On-board computer
Connection status
Displ aying ............................................ 360
Overview ............................................ .360
Connectivity Setting up a hotspot via business tel‐
ephony ................................................ 292
Swit ching transmission of theve hicle
position on/off .................................... 292
Contacts ................................................... 339
Calling up ............................................ 340
Deleting ............................................... 342
Downloading (from mobile phone) ...... 340
Importing ............................................. 341
Importing (o verview) ............................ 341
Information .......................................... 339 Making a call ......................................
.341
Na me form at ...................................... .340
Options ................................................ 341
St oring .................................................3 41
Controller Operating ............................................ 283
Con venience closing ................................. 87
Con venience opening ................................ 86
Coolant (engine) Check le vel .......................................... 398
No tes ................................................... 467
Cooling see Climate control
Co pyright ...................................................29
Cornering light ........................................ .131
Cross Traf fic Alert .................................. .234
Crosswind Assist Function/no tes ................................... 19 2
Cruise control .......................................... 19 8
Ac tivating ............................................ 200
Buttons ................................................ 200
Calling up a speed ............................... 200 Deactivating ........................................ 200
Fu
nction .............................................. 19 8
Re quirements ...................................... 200
Selecting ............................................ .200
Setting a speed ................................... 200
St oring a speed ................................... 200
Sy stem limitations ...............................1 98
Cup holder Rear ben chseat ................................... 121
Cup holder in the centre console
ins talling/ removing (auto matic
transmission) ....................................... 121 D
Dashboa rd
see Cockpit
Dashboard lighting see Instrument lighting
Data acquisition Vehicle .................................................. 26
Data import/export ................................ 296
Fu nction/no tes ................................... 296
Importing/exporting ............................2 97548
Index

¯
AdBlue sy stem fault Perf.
re duced: XXX mph No start in XXX
miles .................................................. .505
¯ AdBlue sy stem fault See Own‐
er's Manual ........................................ .504
4Ad d 1 litre engine oil when next
re fuelling ............................................. 503
Air conditioning Malfunction See
Owner's Manual .................................. 520
Apply brake todeselect Park (P)
position ...............................................5 07
App lybrake toselect R ....................... 508
ÀAT TENTION ASSIST inoperative ... 492
ÀAT TENTION ASSIS T:Take a
break! .................................................. 488
bAu tomatic driving lights inoper‐
ative .................................................... 524
Au xilia rybattery malfunction .............. 508
Beginning emer gency stop .................. 484 Blind Spot Assist cur
rently una vaila‐
ble See Owner's Manual ...................... 494
Blind Spot Assist inope rative ............... 488
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...4 91
Cann otstart engine See Owner's
Manual ................................................ 498
ÁChan gekey bat teries ...................5 14
J Check brake fluid le vel................ 477
Check brake pads See Owner's Man‐
ual ...................................................... .486
4Che ckeng. oil le v.when next
re fuelling ............................................. 503
ïChe cktrailer hitch lo ck(white
display message) .................................5 18
Check tyre pressures then restart
Ru n Flat Indicator ................................. 512
h Check tyre(s) .............................. .510
! Clean the fuel filter ...................... 497
J Close boot separator .................. 522 K
Convertible Top Operation pos‐
sible to60 km/h ................................. 522
?Coolant Stop vehicle Switch
engine off ............................................ 499
Cruise contro l and Limiter inope ra‐
tive ...................................................... 494
Cruise control inope rative ................... 494
Cruise control off ................................ 493
!cu rrently unavailable See Own‐
er's Manual .......................................... 479
÷ currently una vailable See Own‐
er's Manual .......................................... 473
5 Engine oil le vel cannot be
measured ............................................ 501
4Engine oil le velRe duce oil le vel...5 01
4 Engine oil le velSt op vehicle
Switch engine off ................................. 501
4Engine oil pressure Stop Switch
off engine ............................................ 502 Index
551

Electronic
Stability Prog ram
see ESP ®
(Electronic Stability Prog ram)
Emer gency
Fire extinguisher ................................. .414
Fir st-aid kit (so ftsided) ........................ 413
Overview of the help functions .............. 16
Re moving thewa rning triangle ............ .413
Saf etyve st ........................................... 412
Setting up thewa rning triangle ............ 413
Emer gency braking ................................. 185
Emer gency braking
see BAS (Brake Assi stSystem)
Emer gency call sy stem
see Mercedes-Benz emer gency call sy stem
Emer gency engine start .......................... 431
Emer gency key
Inserting/removing ................................ 74
Locking a door ....................................... 80
Un locking a door .................................. .80
Emer gency operation mode
St arting theve hicle ............................. 15 9
Emer gency spare wheel .........................4 53
No tes .................................................. 453 Re
moving ............................................ 454
ENERGIZI NGcomfort
Overview of programs ........................ .302
St arting the program ........................... 303
Engine ECO start/ stop function ......................1 63
Engine number ................................... .457
St arting (Digital Vehicle Keyst icke r) .... 15 8
St arting (eme rgency operation
mode) .................................................. 15 9
St arting (mobile phone) ...................... .158
St arting (Remo teOnline) ..................... 16 0
St arting (s tart/s top button) .................1 57
St arting assis tance .............................. 424
Switching off (s tart/s top button) ........ 17 9
Engine bonnet Function (active bonnet) ...................... 392
Opening/closing ................................. 393
Re setting (active bonnet) .................... 392
Engine data Displaying ............................................ 16 8
Engine electronics Notes .................................................. 455
Engine number ........................................4 57Engine oil
................................................ .396
Ad ditives .............................................4 65
Capacity .............................................. 465
Che cking the oil le vel using the oil
dipstick ............................................... 395
Checking the oil le vel using the on-
board computer ................................... 396
MB-Fr eigabe or MB-Appr oval .............. .465
Quality ................................................. 465
To pping up ...........................................3 96
Entering characters
Fu nction/no tes ................................... 288
On theto uchpad ................................ .289
Using the controller ............................. 289
EQ Boost ECO start/ stop function (operation) ....1 63
Glide mode .......................................... 172
Operating saf ety .................................... 21
Qualified specialist workshop ................25
ERA-GLONASS test mode
St arting/ending .................................. 356
ESC (Elect ronic Stability Control)
see ESP ®
(Electronic Stability Prog ram) 556
Index