fuel MERCEDES-BENZ E-CLASS CABRIOLET 2018 Workshop Manual

Display messages
Possible causes/consequences and M
MSolutions
& inoperative Refuel vehicle *T
here is too little fuel in the fuel tank. The stationary heater cannot be swit ched on. #
Refuel theve hicle.
&
inoperative Battery low *T
he on-board electrical sy stem voltage is too lo w.
The stationary heater has swit ched itself off. #
Drive for an extended pe riod until the battery has reached a suf ficient charge leve l again. Soft
top Display messages
Possible causes/consequences and M
MSolutions
K 12 V battery See Owner's
Manual *T
he on-board electrical sy stem voltage is too lo w. #
Start the engine.
K *T
he soft top is not loc ked. If you drive at speeds of more than 60 km/h you cannot open or close the soft top. #
Do not drive at speeds greater than 60 km/h. #
Fully open or close the soft top. Display messages and
warning/indicator lamps 521

Ð
Po
we r-assis tedsteering malfunction
(→ page 538)
à AIR
BODY CONTROL malfunction
(→ page 533)
à DY
NA MIC BODY CONTROL malfunc‐
tion (→ page 533) ;
Engine diagnostics (→
page 534)
% Preglow
# Electrical
fault( →page 534)
8 Fu
elreser vewith fuel filler cap loca‐
tion indicator (→ page 534) ?
Coolant
too hot/cold (→ page 534)
h Ty
re pressure monitor (→ page 536)
ï Tr
ailer hit chis not operational or is
swivelling (→ page 538) Saf
ety sy stems Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
! Re d indicator lamp, elect ric
parking brake applied
!
Ye llow elect ric pa rking
brake indicator lamp is mal‐
functioning The
red elect ric pa rking brake indicator lamp flashes or is lit. The yellow indicator lamp is also lit if the electric parking
brake malfunctions. #
Obser vethe messages on the multifunction displa y. Displ
aymessa ges and warning/indicator lamps 527

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
8 Fu elreser ve wa rning lamp The
yellow fuel reser vewarning lamp is lit while the engine is running.
The fuel supply has dropped into there ser verange. #
Refuel.
?
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 under any circums tances. Display messa
ges and warning/indicator lamps 535

Ac
tive Lane Keeping Assist .................... 24 2
Ac tivating/deactivating ...................... .244
Ac tivating/deactivating thewa rning .... 24 5
Fu nction .............................................. 24 2
Setting the sensitivity .......................... 24 5
Sy stem limitations ...............................2 42
Ac tive Parking Assist .............................. 229
Cross Traf fic Alert ............................... 234
Drive AwayAssi st................................ 234
Exiting a pa rking space ...................... .232
Fu nction .............................................. 229
Manoeuvring assi stance ...................... 235
Pa rking ................................................ 230
Sy stem limitations ...............................2 29
Ac tive Se rvice Sy stem PLUS
see AS SYST PLUS
Ac tive Speed Limit Assi st....................... 205
Display ................................................ 205
Fu nction .............................................. 205
Ac tive Steering Assist ............................ .208
Ac tivating/deactivating ...................... .210
Ac tive Emergency Stop Assist .............. 211
Ac tive Lane Change Assi st................... 210
Displ ays in the instrument display .......2 12Fu
nction .............................................. 208
Sy stem limitations ...............................2 08
Ad aptive brake lights ..............................19 8
Ad aptive cruise control
see Active Dis tance Assi stDISTRONIC
Ad aptive functions, MULTIBEAM LED
see Intelligent Light Sy stem
Ad aptive Highbeam Assist Plus
Fu nction .............................................. 13 2
Switching on/off ................................. 13 3
Ad Blue ®
.................................................... 464
Ad ditives .............................................4 64
Capacity .............................................. 464
Fill le vel .............................................. .257
No tes ................................................... 176
Purity ................................................... 464
Ra nge .................................................. 257
To pping up ...........................................1 77
Ad ditional door lo ck.................................. 76
Ad ditional value range
Setting display content ........................ 255
Ad diti ves.................................................. 465
Ad Blue ®
............................................... 464 Engine oil ............................................ 465
Fu
el ..................................................... 462
Ad diti ves (AdBlue ®
)
see AdBlue ®
Ad diti ves (engine oil)
see Additives
Ad diti ves (fuel)
see Fuel
Ad dress book
see Contacts
Ad justing the balance/ fader
Burmes ter®
sur round sound sy stem ... 390
Ad justing the sound focus
Burmes ter®
sur round sound sy stem ... 390
Ad justing treble, mid- range and bass
settings
Burmes ter®
sur round sound sy stem ... 390
ADS PLUS damping sy stem
see AIR BODY CONTROL
Ad versewe ather light ............................ .132
Af ter-sales service centre
see ASS YST PLUS Index
541

¯
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

6Example: Left windowbag mal‐
function Consult
workshop ................. 483
Fa ult Drive at max. 80 km/h ...............490
6Fr ont left malfunction Consult
wo rkshop (Example) ............................4 85
_Fr ont left seat backrest not
loc ked (Example) .................................. 516
Fr ont-passenger airbag disabled See
Owner's Manual ..................................4 82
Fr ont-passenger airbag enabled See
Owner's Manual ................................... 481
b Hazard warning lamps mal‐
functioning .......................................... 524
&inoperative Bat tery low ................ 521
&inoperative Refuel vehicle ............ 521
&inoperative See Owner's Man. ....520
!inoperative See Owner's Man‐
ual ....................................................... 480
÷inoperative See Owner's Man‐
ual ....................................................... 480 Tinoperative See Owner's Man‐
ual
....................................................... 477
G Inoperative .................................. 484
bIntellige nt Light System inoper‐
ative ....................................................5 23
ÁKe y not de tected (red displ ay
messa ge).............................................5 13
Á Key not de tected (white dis‐
pl ay messa ge)...................................... 513
b Left dipped beam (Example) ....... 523
6Left windowbag malfunction
Consult workshop (Example) ............... 481
Let fresh air into theve hicle interior!
Air conditioning malf. Visit workshop .. 520
Limiter inoperative .............................. 494
Limiter passive .................................... 494
¢ Lowe ring .................................... 492
bMalfunction See Owner's Man‐
ual ....................................................... 524
ðMaximum speed exceeded ..........4 94 Mercedes me connect Services limi‐
te
d See Owner's Manual .....................484
Mo tor can be star ted again .................4 99
N permanently active Risk of vehicle
ro lling .................................................. 506
çOff .............................................. .492
ëOff ............................................... 489
Only select Park (P) when vehicle is
st ationary ............................................ 507
K Open/close top comple tely ........ 521
ïOpe ration only possible in
transmission position N .......................515
ï Operation only possible in
transmission position P ........................51 5
! Parking brake See Owner's
Manual ................................................ .474
Á Place theke y in the mar ked
space See Owner's Manual ..................514
K Please check direction of tr avel ...... 484
Please reduce speed ...........................4 87552
Index

ÛPlease
wait Charging high- volt‐
age battery .......................................... 500
PRE- SAFE inoperati veSee Owner's
Manual ................................................ 483
Ra dar sensors dirty See Owner's
Manual .................................................4 78
_ Rear left seat backrest not
loc ked (Example) .................................. 51 5
h Rectify tyre pressure ....................51 0
Re duce speed ...................................... 512
Ø Refill Ad Blue Eng. start not pos‐
sible .................................................... 504
ØRe fill Ad Blue See Owne r’s Man‐
ual .......................................................5 04
!Re lease parking brake .................476
¸ Replace air cleaner ...................... 497
ÀRe placekey See Owner's Man‐
ual ........................................................ 514
Á Replace key ................................ .513
8 Reser vefuel le vel........................ 500 6Re
stra int sys. malfunction Con‐
sult workshop ...................................... 486
Re versing not poss. Consult work‐
shop ....................................................5 07
Risk of vehicle rolling Driver door
open and transmission not in P ...........507
Ru n Flat Indicator inope rative .............. 512
# See Owner's Manual ................... 496
Speed limit (winter tyres) XXX km/h ... 494
ÐSt eering malfunction Incre ased
ph ysical ef fort See Owner's Manual .....516
Ð Steering malfunction Stop
immediately See Owner's Manual ........516
St op vehicle Lea veengine running
Wa itTransmission cooling ...................506
#St opvehicle Lea veengine run‐
ning ..................................................... 497
#St opvehicle See Owner's Man‐
ual .......................................................4 98
ÉSt opvehicle Vehicle too low ........ 491 çsuspended
..................................4 93
bSwitch off lights .......................... 523
bSwitch on headla mps.................. 524
To shift out of P or N,depress brake
and start engine .................................. 507
K Top lo wering ............................... 522
ØTo p upAdBlue Perf.re duced in
XXX miles See Owner's Manual ...........506
Ø Top up AdBlue Perf.re duced:
XXX km/h Nostart in XXX km ............ 505
To p up coolant See Owner ’sManual ... 497
¥To p upwasher fluid ...................... 51 8
Tr af fic Sign Assi stCamera view
re stricted See Owner's Manual ........... 490
Tr af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ...................... 489
Tr af fic Sign Assi stinope rative ............. 488
ïTr ailer coupling extending… .........51 5
Tr ansmission Malfunction Stop ........... 506 Index
553

Fu
elreser ve ........................................ 463
Low outside temp eratures ...................4 62
Pe trol ................................................... 461
Quality (diesel) .................................... 462
Quality (p etro l) .................................... .461
Re fuelling ............................................. 173
Sulphur content ................................... 461
Ta nk content ....................................... 463
Fu el consum ption
On-board computer ............................ .258
Fu nction seat
see Door cont rol panel
Fu ses ........................................................ 431
Before replacing a fuse ........................ 431
Fu se assignment diagram .................... 431
Fu se box in the boot ............................4 33
Fu se box in the engine compartment .. 432
Fu se box in the front passenger foot‐
we ll ...................................................... 433
Fu se box on the dashboard ................. 433
No tes ................................................... 431 G
Garage door opener Cleari ngthe memory ........................... 182
Opening or closing the door ................1 82
Programming buttons .......................... 180
Ra dio equipment appr oval numbers .... 182
Re solving problems .............................. 181
Synchronising thero lling code ............ .181
Gearshift recommendation .....................171
Genera l operating permit number
(EU) .......................................................... .457
Genuine parts ............................................ 20
Glide mode ............................................... 172
Glo vebox
Air vent ................................................ 154
Locking/unlocking ...............................1 16 H
Handbrake see Electric parking brake
Handling characteristics (unusual) ....... 435
HANDS-FREE ACCESS ................................ 82 Haza
rdwa rning lights ............................ .130
HD prog rammes
see CI+ module
Head airbag ............................................... 38
Head le vel heating (AIRSCARF) ..............109
Head restra int
Fr ont (adjusting mechanically) .............1 03
Re ar (fitting/removing) ........................ 105
Head-up display ....................................... 263
Ad justing display elements (on-board
compu ter) ............................................ 263
Ad justing the brightness (on-board
computer) ............................................ 263
Fu nction .............................................. 264
Menu (on-board compu ter) .................. 263
Operating the memory function ........... 11 3
Setting the position (on-board com‐
puter) .................................................. 263
Switching on/off ................................. 265
Headla mpflasher ................................... .129
Heating see Clima tecontrol 558
Index

Ne
utral
Engaging .............................................. 17 0
NFC see Near Field Communication (NFC)
No n-operational time
Ac tivating/deactivating standby
mode .................................................. .186
St andby mode function ...................... .186 O
Occupant saf ety
Pe ts in theve hicle ................................. 70
Occupant saf ety
see Airbag
see Automatic front passenger front
airbag shutoff
see PRE-SAFE ®
(anticipatory occu‐
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
see Restra int sy stem
see Seat belt
Odome ter
see Total dis tance Oil
see Engine oil
On-board co mputer ................................. 254
Assis tant displ aymenu ........................ 257
Displaying the service due date ........... 391
Head-up display menu .........................2 63
Media menu ........................................ 262
Menu designs ...................................... 255
Menu overview .................................... 254
Multifunction display .......................... .256
Na vigation menu ................................. 260
Operating ............................................ 254
Ra dio menu .......................................... 261
Service menu ...................................... 257
Te lephone menu .................................. 262
Tr ip menu ............................................ 258
On-boa rddiagno stics inter face
see Diagno stics connection
On-boa rdelectronics
Engine electronics .............................. .455
No tes .................................................. 455
Tw o-w ayradios .................................... 455
Open-source software .............................. 29 Opening
the boot lid using your foot
HANDS-FREE ACCESS .......................... .82
Operating fluids
Ad Blue ®
............................................... 464
Ad ditives (fuel) .................................... 462
Brake fluid .......................................... .466
Coolant (engine) .................................. 467
Engine oil ............................................ 465
Fu el (diesel) ......................................... 462
Fu el (petrol) ......................................... 461
No tes .................................................. 459
Wi ndsc reen washer fluid .................... .467
Operating saf ety
48 V on-boa rdelectrical sy stem ............ 21
Declaration of Conformity (electro‐
magnetic compatibility) ........................ .23
Declaration of conformity (ja ck) ............ 23
Declaration of con form ity (TIREFIT kit) .. 24
Declaration of conformity (wireless
ve hicle components) ............................. 23
EQ Boost ................................................ 21
Information ............................................ 21
Operating sy stem
see On-board computer 566
Index