service MERCEDES-BENZ E-CLASS CABRIOLET 2020 Repair Manual

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
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 in accordance with the traf fic conditions and switch off the engine. Do not continue
driving. #
Notethe 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 293). Display messages and
warning/indicator lamps 419

Ac
tive Se rvice Sy stem PLUS
see AS SYST PLUS
Ac tive Speed Limit Assi st....................... 19 8
Displ ay................................................. 19 8
Fu nction .............................................. 19 8
Ac tive Steering Assist ............................ .201
Ac tivating/deactivating ...................... .203
Ac tive Emergency Stop Assist .............2 03
Fu nction .............................................. 201
Sy stem limits ....................................... 201
Ac tive Traf fic Jam Assist
Ac tivating/deactivating ...................... .204
Fu nction .............................................. 203
Ad aptive brake lights ..............................19 0
Ad aptive cruise control
see Active Dis tance Assi stDISTRONIC
Ad aptive Highbeam Assist
Fu nction .............................................. 127
Switching on/off ................................. 12 8
Ad aptive Highbeam Assist Plus
Fu nction .............................................. 12 8
Switching on/off ................................. 13 0Ad
Blue ®
.................................................... 350
Ad ditives .............................................3 50
Capacity .............................................. 350
No tes ................................................... 171
Purity ................................................... 350
To pping up ...........................................1 72
Ad ditional door lo ck.................................. 74
Ad diti ves.................................................. 351
Ad Blue ®
............................................... 350
Engine oil ............................................. 351
Fu el ..................................................... 348
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 AIR BODY CONTROL
Ad versewe ather light ............................ .127
Af ter-sales service centre
see ASS YST PLUS AIR
BODY CONT ROL................................ 206
Setting ................................................ .207
Suspension .......................................... 206
Air conditioning menu Calling up ............................................ 14 0
Air distribution Setting ................................................ .139
Setting (MBUX multimedia sy stem) ...... 141
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) .................................... 14 8
Ad justing the AIRSCARF vents ............. 14 8
Air vents
see Air vents 430
Index

Air-conditioning sy
stem
see Climate control
Air-recirculation mode ............................14 2
Air-water duct .......................................... 295
Ke eping free ........................................2 95
Airbag ........................................................ .42
Ac tivation .............................................. 36
Fr ont airbag (driver, front passenger) ....42
Head airbag ........................................... 42
Ins tallation locations ............................ .42
Knee airbag ........................................... 42
Overview ............................................... 42
PA SSENGER AIR BAG indicator lamp .... .47
Pr otection ..............................................43
Re duced pr otection ...............................44
Side airbag ............................................ 42
AI RC AP
Ac tivating .............................................. 85
Deactivating .......................................... 85
Ai rflow
Setting ................................................ .139
AIRSCARF Adjusting the outlets ........................... 14 8
Switching on/off ................................. 107Alarm sy
stem
see ATA (anti-theft alarm sy stem)
All-wheel drive see 4MATIC
Ambient lighting Setting (multimedia sy stem) ................1 31
Android Auto
see Smartphone integration
Animals Pets in theve hicle ................................. 70
Anti-lock braking sy stem
see ABS (Anti-lock Braking Sy stem)
Anti-skid chains
see Snow chains
Anti-theft pr otection
Ad ditional door lock ...............................74
Immobiliser ........................................... 92
Anticipatory occupant pr otection
see PRE- SAFE®
(anticipatory occu‐
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus) Apple CarPlay
®
see Smartphone integration
Assistance sy stems
see Driving saf ety sy stem
ASS YST PLUS ........................................... 288
Battery disconnection pe riods .............2 89
Displ aying the service due date ........... 288
Fu nction/no tes ................................... 288
Re gular maintenance work .................. 288
Special service requ irements .............. 288
ATA (anti-theft ala rmsystem) .................. 93
Deactivating the alarm .......................... 93
Fu nction ................................................ 93
Fu nction of interior pr otection ............... 94
Priming/deactivating interior pr otec‐
tion ........................................................ 95
Priming/deactivating tow- aw ay pro‐
te ction ................................................... 94
To w- aw ay protection function ................93
AT TENTION ASSI ST.......................... 22 4, 226
Fu nction .............................................. 224
Setting ................................................. 226
Sy stem limitations ...............................2 24 Index
431

St
oring a speed ................................... 19 2
Sy stem limitations ...............................1 91D
Dashboa rd
see Cockpit
Data acquisition Vehicle ................................................... 31
Data storage
Electronic control units .......................... 31
Online services ...................................... 33
Ve hicle ................................................... 31
Deactivating the ala rm(ATA ).................... 93
Dealership see Qualified specialist workshop
Declaration of conformity Electromagnetic compatibility ............... 24
Jack ...................................................... .27
TIREFIT kit ............................................. 28
Wi reless vehicle components ................24
Decorative foil (cleaning instructions) .. 297
DeNOx agent see AdBlue ® De
stination entry .................................... 260
En tering a POI or address .................... 260
De tecting inat tentiveness
see ATTENTION ASSIST
Diagnostics connection ............................28
Diesel Low outside temp eratures ...................3 48
No tes .................................................. 348
Digital Owner's Manual .............................18
Digital Vehicle Keyst icker
Locking theve hicle ................................ 76
St arting theve hicle ............................. 15 2
Unlocking theve hicle ............................76
Dinghy towing
see Tow- bar sy stem
Dipped beam Setting .................................................1 30
DIRECT SELECT le ver............................... 16 4
Engaging drive position ....................... 16 6
Engaging neutral .................................. 16 5
Engaging pa rkposition ........................ 16 6
Engaging pa rkposition automatically .. 16 6
Engaging reve rsege ar ........................ .165 Fu
nction .............................................. 16 4
Display (care) .......................................... .302
Display (MBUX multimedia sy stem)
Home screen ...................................... .249
Display (multimedia sy stem) ................ .250
Operating ............................................ 250
Display (on-board comp uter)
Displ ays on the multifunction display .. 24 5
Display message .................................... .359
Calling up (on-board computer) ........... 359
No tes .................................................. 359
Display messages ¯ - - - km/h ................................... 385
ç - - - km/h ................................... 386
È - - - km/h ................................... 385
# 12V battery See Owner's Man‐
ual ....................................................... 402
K 12V battery See Owner's Man‐
ual ....................................................... 366
Û 48 V battery See Owner's Man‐
ual ....................................................... 403 436
Index

App
lybrake todeselect Park (P)
position ...............................................3 78
App lybrake toselect D or R ................378
App lybrake toselect R ........................ 378
Au xilia rybattery malfunction .............. 380
Beginning emer gency stop .................. 388
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ...................... 393
Blind Spot Assist inope rative ............... 393
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...3 93
Cannot start engine See Owner's
Manual ................................................ 404
Check tyre pressures then restart
Ru n Flat Indicator ................................ 409
Cruise control and Limiter inope ra‐
tive ...................................................... 385
Cruise control inope rative ................... 385
Cruise control off ................................ 385 Fr
ont-passenger airbag disabled See
Owner's Manual ................................... 361
Fr ont-passenger airbag enabled See
Owner's Manual ................................... 361
Hazard warning lamps malfunction‐
ing ...................................................... .369
Limi ter inoperative .............................. 386
Limiter passive .................................... 385
Mercedes me connect Services limi‐
te d See Owner's Manual ...................... 401
Mo tor can be star ted again .................4 04
N permanently active Risk of vehicle
ro lling .................................................. 379
Only select Park (P) when vehicle is
st ationary ............................................ 377
Place theke y in the mar ked space
See Owner's Manual ...........................364
PRE-SAFE inoperative See Owner's
Manual ................................................ 362
Re duce speed ...................................... 408 Re
versing not poss. Consult work‐
shop ....................................................3 79
Risk of vehicle rolling Driver door
open and transmission not in P ...........378
Ru n Flat Indicator inope rative ............. 409
Speed limit (winter tyres) XXX km/h ... 387
St op vehicle Lea veengine running
Wa itTransmission cooling ...................380
To shift out of P or N,depress brake
and start engine .................................. 378
To switch off the engine, press the
St art/ Stop button for at least 3 sec‐
onds or 3 times. .................................. 375
Tr af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ...................... 392
Tr af fic Sign Assi stinope rative ............. 392
Tr ansmission Malfunction Stop ........... 379
Ty re press. monitor cur rently una vail‐
able .................................................... .405
Ty re press. monitor inoperative ...........405 440
Index

Mercedes me app
Information .......................................... 273
Mercedes me calls Arranging a service appointment ......... 271
Calling the Mercedes-Benz Cus tomer
Centre ................................................. 270
Calling the Mercedes-Benz Cus tomer
Centre af ter auto matic accident or
breakdown de tection ........................... 270
Consenting todata transfer .................2 71
Information ..........................................2 70
Making a call via theove rhead con‐
trol panel ............................................. 269
Tr ans ferred data ..................................2 72
Mercedes me connect Accident and Breakdown Manage‐
ment .................................................... 268
Information .......................................... 267
Tr ans ferred data ..................................2 69
Mercedes-AMG vehicles
No tes ................................................... 15 0
Mercedes-Benz emer gency call sys‐
te m ............................................................ 276
Au tomatic emergency call ................... 277Information ..........................................2
76
Information on data transfer ................ 278
Manual emer gency call ........................ 278
Overview ..............................................2 76
Self-diagnosis (Russia) ........................ 279
St arting/ending ERA-GLONASS test
mode .................................................. .279
Mercedes-Benz Link see Smartphone integration
Mercedes-Benz service centre see Qualified specialist workshop
Message (multifunction display) see Display message
Message memory .................................... 359
Mir rors
see Outside mir rors
Mobile phone Frequencies ......................................... 342
Tr ansmission output (maximum) ........ .342
Wi reless charging ................................ 12 0
Mobile phone see Smartphone integration
see Telephone Model series
see Vehicle identification plate
MOExtended tyres ..................................3 06
Mo torw ay mode ....................................... 12 6
MULTIBEAM LED ...................................... 12 5
Multifunction display Overview of the displa ys...................... 24 5
Multifunction steering wheel
Overview of buttons ............................ 24 3
Multifunction steering wheel
see Steering wheel
Multimedia sy stem
see Display (multimedia sy stem)
see MBUX multimedia sy stem
see Touchpad N
Na vigation
No tes ................................................... 257
Overview ............................................. 259
Showing/hiding the menu ...................2 58
Switching on ....................................... 258 Index
449

Na
vigation
see Destination entry
see Map
see Route
Ne arField Communication (NFC)
Locking theve hicle (Digital Vehicle
Ke yst icke r) ............................................ 76
St arting theve hicle (Digital Vehicle
Ke yst icke r) .......................................... 15 2
Un locking theve hicle (Digital Vehicle
Ke yst icke r) ............................................ 76
Ne utral
Engaging .............................................. 16 5
Note s........................................................ 15 5
Optimised acceleration ........................ 15 5O
Occupant saf ety
see Airbag
see Automatic front passenger front
airbag shutoff
see Pets in theve hicle
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
Oil see Engine oil
On-board computer ................................. 24 3
Displ aying the service due date ........... 288
Head-up display menu .........................2 46
Multifunction display ........................... 24 5
Operating ............................................ 24 3
Overview of menus .............................. 24 3
On-board diagnostics inter face
see Diagno stics connection
On-boa rdelectronics
Engine electronics .............................. .341
No tes ................................................... 341
Tw o-w ayradios .................................... 341
Online services Data storage .......................................... 33
Online services see In-Car Of fice
Open-source so ftwa re .............................. 34 Opening the bo
otlid using your foot
HANDS-FREE ACCESS .......................... .80
Operating fluids
Ad Blue ®
............................................... 350
Ad ditives (fuel) .................................... 348
Brake fluid .......................................... .353
Coolant (engine) .................................. 353
Engine oil ............................................. 351
Fu el (diesel) ......................................... 348
Fu el (petrol) ......................................... 347
No tes .................................................. 345
Wi ndsc reen washer fluid .................... .354
Operating saf ety
48 V on-boa rdelectrical sy stem ............ 22
Declaration of confo rmity (elect ro‐
magnetic compatibility) ......................... 24
Declaration of conformity (ja ck) ............ 27
Declaration of conformity (TIREFIT kit) .. 28
Declaration of conformity (wireless
ve hicle components) ............................. 24
EQ Boo st............................................... 22
Information ............................................ 22
Ope rating sy stem
see On-board computer 450
Index

Operating
the memory function ........... 11 2
Pa nel heating ....................................... 107
Re setting the settings .......................... 104
Setting options ...................................... 14
Switching AIRSCARF on/off ................ 107
Wo rkout programme overview ............ .103
Seat belt ............................................... 37,41
Ac tivating/deactivating seat belt
adjustment ............................................ 41
Care .................................................... 302
Fa stening ............................................... 40
Pr otection ..............................................37
Re ar seat belt status display .................. 41
Re duced pr otection ...............................38
Re leasing .............................................. .41
Seat belt adjustment (function) ............. 41
Seat belt extender ................................. 39
Wa rning lamp ........................................ .41
Seat belt adjustment Activating/deactivating ......................... 41
Fu nction ................................................. 41
Seat belt extender .....................................39
Seat belt tensioners
Ac tivation .............................................. 36 Seat belt
warning
see Seat belt
Seat co ver (Care) ..................................... 302
Seat hea ter
Ac tivating/deactivating ...................... .105
Seat ventilation
Switching on/o ff................................. 107
Selecting a gear
see Changing gears
Selector le ver
see DIRECT SELECT le ver
Self-test Automatic front passenger front air‐
bag shutoff ............................................ 47
Sensors (care) .......................................... 301
Service see ASS YST PLUS
Service centre see Qualified specialist workshop
Service inter val display
see AS SYST PLUS Setting a speed
see Cruise control
Setting the map scale
see Map
Shift paddles see Steering wheel gearshift paddles
Shifting gears
Gea rshift recommendation .................. 167
Side airbag .................................................42
Side windo ws............................................. 88
Au tomatic function ................................ 90
Child saf ety lock in there ar .................. .68
Closing .................................................. 88
Closing (all) .......................................... .88
Closing using theke y ............................ .91
Con venience closing .............................. 91
Con venience opening ............................ 91
Opening .................................................88
Opening (all) .......................................... 88
Opening with theke y ............................ .91
Problem .................................................92
Ra in-closing feature .............................. .90
Smartphone see Smartphone integration 454
Index