ECU MERCEDES-BENZ E-CLASS CABRIOLET 2021 Manual PDF

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
&
inoperative Battery low *T
he on-board elect rical system voltage is too lo w.
The stationa ryheater has switched itself o.. #
Drive an extended distance until the battery has reached a su1cient charge leve l again.
&
inoperative Refuel vehicle *T
here is too little fuel in the fuel tank. The stationary hea ter cannot be switched on. #
Refuel theve hicle. V
V
ehicle
ehicle Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/conseq uences and
uences andM
MSolutions
Solutions
d
Vehicle is operational
Switch off ignition before
exiting *Y
ou are leaving theve hicle in a ready-to-drive state. #
Get out of theve hicle, secure it against rolling away and take theke y with you. #
Ifyo u do not lea vetheve hicle, switch o. the electrical consumers, e.g. the seat heating. Otherwise, the 12‑V bat-
te ry may dischar geand starting the engine may be possible only with the help of a second battery (jump start). Display messages and
warning/indicator lamps
383 383

Displa
Displa
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y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
ï
Check trailer hitch
lock (white display message) *T
he trailer hitch is not operational during a jou rney with a trailer. &
W WARNING
ARNING Risk of an accident if the ball neck is not loc ked
The trailer may become de tach ed. #
Stop theve hicle immediately in accordance with the tra1c conditions. Do not continue driving. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivel mo vement and do not re-couple the trailer until thewa rning/indicator lamp goes out. #
Initiate a new swivel mo vement (/ page 240). #
When the display message disappears, couple up the trailer and drive on.
If th e display message does not disappear, the trailer hitch is malfunctioning and the ball neck is not loc ked. #
Do not couple up the trailer. Drive on without the trailer. No tethere duced ground clearance due tothe unloc ked
ball nec k. #
Consult a quali/ed specialist workshop.
*W hen theve hicle is stationary with a coupled trailer, the trailer hitch is not operational. #
Uncouple the coupled trailer and secure it against rolling away. #
If t
If t he ball nec
he ball nec k has been f
k has been f olded in:
olded in:unlockthe ball neck (/ page 240). #
Swivel the ball neck into the end position manually and let it engage. #
If t
If t he ball nec
he ball nec k has been f
k has been f olded out
olded out::unlock the ball neck (/ page 240).384
384
Display messages and
warning/indicator lamps

Displa
Displa
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es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
Auxiliary battery malfunc-
tion (red display message) *V
Vehicles wit ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: The auxiliary battery forth e transmission is no longer being charge d. #
Consult a quali/ed specialist workshop. #
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: untilthen, alw ays select park position jbefore you switch o. theve hicle. #
Before leaving theve hicle, apply the electric parking brake. Br
Br
ak
ak es
es Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/conseq uences and
uences andM
MSolutions
Solutions
!
Parking brake See Owner's
Manual *T
heyellow ! indicator lamp is lit. The electric parking brake is malfunctioning.
T
T o apply o apply :
: #
Switch theve hicle o. and switch it back on #
App lythe electric parking brake manually (/ page 182).
If it is not possible toapply the electric parking brake: #
Consult a quali/ed specialist workshop. #
Where necessar y,also secure the par kedve hicle against rolling away.
*T heyellow ! indicator lamp and there d! indicator lamp are lit. The electric parking brake is malfunctioning.
T
T o r
o r elease:
elease: #
Switch theve hicle o. and switch it back on 394
394
Displ
aymessages and warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Release the electric parking brake manually (/ page 182).
or #
Release the electric parking brake automatically (/ page 181).
If it is still not possible torelease the electric parking brake: #
Do not continue driving. Consult a quali/ed specialist workshop.
*T heyellow ! indicator lamp is lit and there d! indicator lamp is 0ashing. The electric parking brake is malfunc-
tioning.
The electric parking brake could not be applied or released. #
Switch theve hicle o. and switch it back on
T T o apply
o apply :
: #
Release and then apply the electric parking brake manually (/ page 182).
T
T o r
o r elease:
elease: #
Apply and then release the electric parking brake manuall y.
If it is not possible toapply the electric parking brake or there d! indicator lamp continues to0ash: #
Do not continue driving. Consult a quali/ed specialist workshop. #
Where necessar y,also secure the par kedve hicle against rolling away. Display messages and
warning/indicator lamps
395
395

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
*T heyellow ! indicator lamp is lit and there d! indicator lamp 0ashes for appr oximately ten seconds aTer the
electric parking brake has been applied or released. It then remains lit or goes out. The electric parking brake is mal-
functioning.
If t
If t he st he st at
ate of c
e of c harg
harge is t
e is t oo low
oo low :
: #
Char gethe 12 V batter y.
T
T o apply
o apply :
: #
Switch o. theve hicle.
The elect ric parking brake will be applied automatical ly.
If yo u do not wantthe electric parking brake tobe applied, e.g. at an automatic car wash or when theve hicle is being
to we d, lea vetheve hicle switched on. This does not include having theve hicle towe d with there ar axle raised.
If th e electric parking brake is not applied automaticall y: #
Switch theve hicle o. and switch it back on #
Release and then apply the electric parking brake manually (/ page 182).
If it is still not possible toapply the electric parking brake: #
Consult a quali/ed specialist workshop. #
Where necessar y,also secure the par kedve hicle against rolling away.
T
T o r
o r elease:
elease: 396
396
Display messages and
warning/indicator lamps

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
ï
Tr ailer tow hitch warning
lamp *T
hered trailer hitch warning lamp is lit.
The trailer hitch is not operational. &
W
WARNING
ARNING Risk of an accident if the ball neck is not loc ked
The trailer may become de tach ed. #
Stop theve hicle immediately in accordance with the tra1c conditions. Do not continue driving. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivel mo vement and do not re-couple the trailer until thewa rning/indicator lamp goes out. #
Notethe messages on the instrument displa y.Engine
Engine
W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
ÿ
Coolant warning lamp (red) *T
he 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 Display message
s andwarning/indicator lamps
433
433

Seat belt................................................ 312
Seat co ver.............................................3 12
Sensors................................................. 311
SoT top................................................ .308
St eering wheel....................................... 312
Ta ilpipes................................................ 311
Tr ailer hitc h............................................ 311
Wa shing byhand.................................... 307
Wheels/rims.......................................... 311
Wi nd de0ector....................................... 309
Wi ndo ws................................................ 311
Wi per blades.......................................... 311
Car Car pe
pet (Car
t (Car e)
e)............................................... 312
Changing g
Changing g ears
ears
Manually................................................ 169
Changing hub caps
Changing hub caps ....................................... 346
Char
Char ging
ging
Mobile phone (wireless)........................ .121
On-board electrical system battery
(12 V).................................................... 326
USB port................................................1 21
Chassis
Chassis
Damping characteristics........................ .217
DY NAMIC BODY CONTROL................... .217 Chassis lev
Chassis lev el (AIR BOD el (AIR BOD Y C
Y CONTR
ONTR OL)
OL)
Setting................................................... 218
Child safe
Child safe ty lock
ty lock
Re ar side wind ows................................... 72
Child seat
Child seat Appr oval catego ries.................................60
At tach ing (no tes)..................................... .59
Basic instructions.................................... 55
Fr ont passenger seat (no tes).................... 70
Fr ont passenger seat (without auto-
matic airbag shuto.)............................... .69
ISOFIX/i-Size (/tting).............................. .63
No tes on risks and danger s...................... 56
Re commendations forch ild restraint
systems................................................... 58
Seats suitable for belt-secured child
re straint systems..................................... 66
Seats suitable for i‑Size child restraint
systems................................................... 63
Seats suitable for ISOFIX child
re straint systems..................................... 62
Securing on the co-driver seat..................70
Securing on there ar seat......................... 68
To pTe ther................................................ 65 Childr
Childr en en
Av oiding dangers in theve hicle............... .56
Basic instructions.................................... 55
Chock
Chock Storage location..................................... 345
Chock
Chock see Chock
City lighting
City lighting.................................................. 129
Cleaning
Cleaning
see Care
Climat
Climat e contr
e contr ol
ol
Ac tivating/deactivating.......................... 143
Ac tivating/deactivating the A/C func-
tion (control panel).................................1 43
Ac tivating/deactivating the A/C func-
tion (MBUX multimedia system).............. 144
Ac tivating/deactivating the synchro-
nisation function (control panel).............1 44
Ac tivating/deactivating the synchro-
nisation function (MBUX multimedia
system).................................................. 145
Air-recirculation mode............................1 45
Au tomatic control................................. .144
Calling up the air conditioning menu....... 143 450 450
Index

Fu
se box in the front passenger foot-
we ll........................................................ 334
Fu se box on the dashboar d.................... 334
No tes..................................................... 332 G
G
Gar
Gar ag
age door opener
e door opener
Clea ring the memory.............................. 180
Gar
Gar ag
age door openers
e door openers
Opening/closing the door......................1 80
Prog ramming buttons............................. 178
Re solving problems................................ 179
Syn chronising thero lling code................ 179
Gear
Gear shiT
shiT r
recommendation
ecommendation........................... 170
Genuine par
Genuine par ts
ts................................................ 21
Glide mode
Glide mode.................................................. 170
Gr
Gr oss mass
oss mass.................................................. 356 H
H
Handbr Handbr ake
ake
see Electric parking brake
Handling c Handling c har
haract
acter
eris
istics (unusual)tics (unusual) ................ 336
HANDS-FREE A
HANDS-FREE A CCESS CCESS................................... 83 Hazar
Hazar
d w
d war
arning lights
ning lights................................... 127
Head airbag
Head airbag................................................... 46
Head r Head r es
estr traint
aint
Fr ont (adjusting mechanically)................ 103
Re ar (removing//tting)........................... 104
Head space heating (AIRSC
Head space heating (AIRSC ARF)
ARF).................. .109
Head-up display
Head-up display Adjusting brightness (on-board com-
puter).................................................... 252
Ad justing display elements (on-board
co mp uter).............................................. 252
Care...................................................... 312
Fu nction................................................ 251
Menu (on-boa rdcomputer)..................... 252
Operating the memory function.............. 114
Setting the position (on-board com-
puter).................................................... 252
Switching on/o.....................................2 53
Headlam Headlam p
p0ashing
0ashing ........................................ 127
Headlam
Headlam ps
ps
see Automatic driving lights
Heating
Heating see Climate control Help call
Help call
see Mercedes-Benz emer gency call system
High beam
High beam Activating/deactivating.......................... 127
High beam
High beam see Adaptive Highbeam Assist
see Adaptive Highbeam Assist Plus
High-pr
High-pr essur
essure cleaner (car
e cleaner (car e)
e)........................ 306
Hill St
Hill Star
art Assist
t Assist............................................ 190
HOLD function
HOLD function Function/no tes...................................... 188
Switching on/o..................................... 189
Home scr
Home scr een (media displa
een (media displa y)
y)
Overview................................................ 256
Hooking t
Hooking t he lugg
he luggag
age net
e net.............................. .120 I
I
i-Size c
i-Size c hild seat secur
hild seat secur ing syst
ing system
em
Fi tting...................................................... 63
Seats suitable for attaching...................... 63
Identi/cation
Identi/cation plate
plate
Engine................................................... 356
Ve hicle.................................................. 356 460
460
Index

Ignition
key
Ignition key
see Key
Immobiliser
Immobiliser .................................................... 95
Im
Im plied w
plied w arr
arranty
anty
Ve hicle..................................................... 34
In-Car
In-Car O1ce
O1ce
Fe atures................................................ 283
Indicat
Indicat or lamp
or lamp
see Warning/indicator lamp
Individual dr
Individual dr iv
ive pr
e pr ogr
ogram
am
Con/guring............................................ 166
Selecting............................................... 166
Inspection Inspection see ASS YST PLUS
Ins
Instr trument clust
ument clust er
er
Fu nction/no tes.............................. 247, 248
Ins
Ins tr
trument display
ument display
Fu nction/no tes...................................... 248
Instrument clus ter.................................... 10
Overview of displa ys............................... 251
Wa rning/indicator lamps........................ 429 Ins
Instr trument displa
ument displa y and on-boar
y and on-boar d com-
d com-
put
put er
er
Fu nction/no tes...................................... 247
Int
Int ellig
ellig ent Light Syst
ent Light Syst em
em
Ac tivating/deactivating.......................... 129
Ac tive headlamps................................... 128
Ad aptive Highbeam Assis t...................... 130
Ad aptive Highbeam Assist Plu s............... 131
Bad weather light................................... 129
City lighting........................................... .129
Cornering light....................................... 128
Fo g light (enhanced).............................. 129
Mo torw ay mode.................................... .129
Overview................................................ 128
Int
Int er erior lighting
ior lighting
Ad justing............................................... 133
Ambient lighting.................................... .133
Re ading lamp......................................... 133
Switch-o. delay time.............................. 134
Int
Int er
erior pr ot
ior pr otection
ection
Fu nction.................................................. 97
Priming/deactivating.............................. .97
Int
Int er
erne
ne t r
t radio
adio
see TuneIn Ionisation
Ionisation
Activating/deactivating (MBUX multi-
media system)....................................... 145
iPhone
iPhone ®
®
see Smartphone integ ration
ISOFIX c
ISOFIX c hild seat anc
hild seat anc hor
hor
Seats suitable for attaching...................... 62
ISOFIX c
ISOFIX c hild seat secur
hild seat secur ing syst
ing system
em
Fi tting...................................................... 63 J
J
Jack
Jack Declaration of conformity......................... 30
Storage location.................................... .345
Jum Jum p-st
p-st ar
art connection
t connection
General no tes....................................... .324 K
K
K
K e
ey
y
Ac oustic locking veri/cation signal.......... .75
Battery..................................................... 76
Deacti vating a function............................ 75
Emer gency key......................................... 76
Energy consum ption................................ 75 Index
461 461

Pe
rm anent setting.................................. 195
Re quirements........................................ 193
Selecting............................................... 193
Setting a speed...................................... 193
St oring a speed.............................. 193, 198
Switching o./deactivating.................... .198
Switching on/activating......................... 198
System limits......................................... 192
Limiting speed Limiting speed see Limiter
LIN
LIN GUA
GUA TR
TRONIC
ONIC
Fu nction................................................ 259
St arting................................................ .260
Liv
Liv e
eTr
Tra1c
a1c Inf
Infor
ormation
mation
Switching the tra1c information dis-
play on................................................... 271
Loading
Loading Bag hook............................................... 119
No tes..................................................... 115
Ti e-down eyes........................................ 119
Loading guidelines
Loading guidelines.......................................1 15
Loads
Loads
Fixing..................................................... 115 Loc
Loc king/unloc
king/unloc king
king
Ad ditional door loc k................................. 77
Emer gency key......................................... 81
KEYLESS-GO............................................ 79
Switching the automatic locking fea-
ture on/o.............................................. .80
Unlo cking/opening the doors from
th e inside................................................. 78
Lo Lo w beam
w beam
Ac tivating/deactivating.......................... 125
Light adjustment (driving abroad)........... 125
Setting................................................... 133
L L ubr
ubr icant additiv
icant additiv es
es
see Additives
L
L ugg
ugg age
age
Lu ggage net........................................... 120
Securing................................................ 115
L
L umbar support
umbar support
see Lumbar support (4-w ay)
L
L umbar suppor
umbar suppor t (4-wa
t (4-way)
y)...............................1 02 M
M
MA MA GIC VISION C GIC VISION C ONTR
ONTROL
OL
Wi ndsc reen wiper s................................. 137 Maint
Maint
enance
enance
see ASS YST PLUS
Malfunction
Malfunction Restraint system..................................... .40
Manoeuvr
Manoeuvr ing aid
ing aid
see Manoeuvring assistance
Manoeuvr
Manoeuvr ing Assist
ing Assist
see Trailer Manoeuv ring Assist
Manoeuvr
Manoeuvr ing assist
ing assistance
ance
Cross Tra1c Ale rt.................................. 236
Drive Away Assist................................... 235
Manoeuvring brake function................... 236
Manoeuvr
Manoeuvr ing assist
ing assistant
ant
Ac tivating/deactivating.......................... 237
Manoeuvr
Manoeuvr ing br
ing brak
ake function
e function ......................... 236
Map
Map Displaying online map contents.............. 271
Displaying weather informatio n.............. 271
Moving................................................... 270
Selecting the map orientation................ 270
Setting the map scale............................ 270
Switching mo torw ay information
on/o.................................................... 270 Index
463 463