2021 MERCEDES-BENZ E-CLASS COUPE battery

Displa
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es Possible causes/conseq
ossible causes/consequences and uences andM
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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
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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 183).
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 392
392
Displ
aymessages and warning/indicator lamps

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Device detected at diagnos-
tics connection See Own-
er's Manual *T
hevehicle functions forfa ult de tection are restric ted.
At least one of the main functions of the Mercedes me connect system is malfunctioning. #
Obser vethe no tes on the diagnostics connection (/ page 31). #
Consult a quali/ed specialist workshop. Batt Batt
ery
ery Displa
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#
12 V battery See Owner's
Manual *T
hevehicle is o. and thech arge leve l is too lo w. #
Switch o. elect rical consume rsthat are not requ ired.
To charge the 12 V batter y: #
Leavetheve hicle running for a few minutes, or drive an extended distance.
*I fth e message appears while theve hicle is switched on, this indicates an on-board electrical system malfunction. #
Consult a quali/ed specialist workshop.
#
See Owner's Manual *T
he 12 V battery is not being charge d.
* N
NO OTE TE Possible engine damage if you continue driving #
Do not continue driving under any circumstances. 414
414
Display message
s andwarning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Consult a quali/ed specialist workshop. #
Stop immediately in accordance with the tra1c conditions and switch o. theve hicle. #
Consult a quali/ed specialist workshop.
#
Stop vehicle See Owner's
Manual *T
he 12 V battery is no lon ger being charge d and the state of charge istoo lo w.
* N
N O OTE
TE Possible engine damage if you continue driving #
Do not continue driving under any circumstances. #
Consult a quali/ed speciali stwo rkshop. #
Stop theve hicle immediately in accordance with the tra1c conditions. Do not continue driving. #
Switch o. theve hicle. #
Consult a quali/ed specialist workshop.
#
Stop vehicle Leave engine
running *T
he 12 V battery charge leve l is too lo w. #
Stop theve hicle immediately in accordance with the tra1c conditions. Do not continue driving. #
Leavethe engine running. #
Ifth e display message disappears: drive on. #
Ifth e display message does not disappear: consult a quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
415
415

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es Possible causes/conseq
ossible causes/consequences and uences andM
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Solutions
Û
48 V battery See Owner's
Manual *T
he 48 V on-board elect rical system has function restrictions.
Comfort functions ma y berestric ted. #
Consult a quali/ed specialist workshop immediatel y.
Ý
Please wait 48 V battery
charging *T
he 48 V battery is dischar ged. You ha veswitched on theve hicle while the 12 V battery was being charge d with a
suitable charge r or while ano ther vehicle was pr oviding starting assistance.
The dischar ged 48 V battery is charge d automatically via thevo ltage con verter. ATer a fewminutes, theMotor can be
started again display message will be shown on the instrument displa y. #
Start theve hicle. #
Drive theve hicle for a while tocharge the 12 V battery and the 48 V battery aTer disconnecting thech arge r from
th eve hicle.
If th eMotor can be started again display message does not appear aTer a fewminutes: #
Tryto start theve hicle. #
Ifth eve hicle does not start, consult a quali/ed specialist workshop.
Cannot start engine See
Owner's Manual *T
he state of charge ofthe 48 V battery is too lo w.You can no longer start theve hicle. #
Switch o. elect rical consume rsthat are not requ ired. 416 416
Display message
s andwarning/indicator lamps

Displa
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y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Connect a suitable charge r appr ovedfo r Mercedes-Benz with su1cient charge output tothe jump-start connection
point of the 12 V battery (/ page 327).
The 48 V battery is charge d via thevo ltage con verter in theve hicle.
Motor can be started again *The 48 V battery has been charge d automatically via thevo ltage con verter. #
Start theve hicle and drive for a while tocharge the 12 V battery and the 48 V batter y. T
T
yr
yr e pr
e pr essur
essur e monit
e monit or
or Displa
Displa
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y messag es P
es Possible causes/conseq
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MSolutions
Solutions
Tyre press. monitor cur-
rently unavailable *T
here is inter fere nce from a po werful radio signal source. As a result, no signals from the tyre pressure sensors are
being received. The tyre pressure monitoring system is temp orarily una vailable.
The tyre pressure monitoring system will restart au tomatically as soon as the cause has been recti/ed. #
Drive on.
Tyre press. monitor inoper-
ative *T
he tyre pressure moni toring system is malfunctioning. &
W WARNI NG
ARNI NGThere is a risk of an accident if the tyre pressure monitoring system is malfunctioning
The tyre pressure monitoring system cannot issue a warning if there is pressure loss in one or more of the tyres.
Ty res with insu1cient tyre pressure may impair the driving characteristics as well as steering and braking. #
Have the tyre pressure monitoring system checked at a quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
417
417

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Make sure that the air supply tothera diator is not obstructed. #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop. In doing so, ensu rethat the
coolant temp erature display remains below 120°C.
ÿ
Coolant warning lamp (yel-
low) *T
he yellow coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The charge air, transmission oil or battery cooling is faulty
R The radiator shutters are bloc ked or defective #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop.
; Engine diagnosis warning
lamp *T
he yellow engine diagnostics warning lamp is lit while the engine is running.
A malfunction has occur red in the engine, theex haust system or the fuel system.
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 quali/ed specialist workshop.
V
V ehicles wit
ehicles wit h a diesel engine:
h a diesel engine: the fuel tank may ha vebeen run dr y. #
Start the engine thre eto four times aTer refuelling.
If th eye llow engine diagnosis warning lamp goes out, emer gency ope ration mode is cancelled. The vehicle need not
be checked. Display messages and
warning/indicator lamps
433
433

Airbag
Airbag
Activation................................................ 40
Au tomatic co-driver airbag shuto............ .49
Fr ont airbag (driver, front passenger)........ 46
Installation locations................................ 46
Knee airbag............................................. 46
Overview.................................................. 46
PA SSENGER AIR BAG indicator la mps...... 50
Pr otection................................................ 47
Re duced pr otection.................................. 48
Side airbag.............................................. 46
Wi ndow airbag......................................... 46
Air0 ow
Air0ow
Setting................................................... 143
AIRSC AIRSC ARF
ARF
Ad justing the outlets.............................. 153
Switching on/o.....................................1 08
Alar
Alar m syst
m syst em
em
see ATA (anti-theT alarm system)
All-wheel dr
All-wheel dr ive
ive
see 4M ATIC
Ambient lighting
Ambient lighting Setting (MBUX multimedia system)........ .135 Andr
Andr oid A
oid A uto
uto
see Smartphone integ ration
Animals
Animals Pets in theve hicle.................................... 72
Anti-loc
Anti-loc k br
k braking syst
aking syst em
em
see ABS (Anti-lock Braking System)
Anti-skid c
Anti-skid c hains
hains
see Sn owchains
Anti-t
Anti-theT heTprot
pr otection
ection
Ad ditional door loc k................................. 76
Immobiliser.............................................. 94
Anti-t
Anti-theT heTprot
pr otection
ection
see ATA (anti-theT alarm system)
Anticipat
Anticipat or
ory occupant pr ot
y occupant pr otection
ection
see PRE-SAFE ®
(anticipatory occu-
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Apple CarPlay
Apple CarPlay ®
®
see Smartphone integ ration
Assist
Assist ance syst
ance syst ems
ems
see Driving saf ety sy stem ASS
YS
ASS YST PL
T PL US
US
Battery disconnection period s................ 303
Displaying the service due dat e.............. 302
Fu nction/no tes...................................... 302
Re gular maintenance work..................... 302
Special service requ irements................. 302
AT
ATA A(anti-t
(anti-theT heTalar
alarm syst
m syst em)
em)
Deactivating the alarm............................. 95
Fu nction.................................................. 94
Interior pr otection function....................... 95
Priming/deactivating interior pr otection... 96
Priming/deactivating tow- awa y pro-
te ction..................................................... 95
To w- awa y protection function................... 95
A A TTENTION ASSIST TTENTION ASSIST
Function................................................ 191
Setting.................................................. .193
System limitations.................................. 191
A
A tt
tt ention assist
ention assist ant
ant
see ATTENTION ASSIST
A
A ut
ut hor
hor ised w
ised w ork
orkshop
shop
see Quali/ed specialist workshop
A
A ut
ut omatic co-dr
omatic co-dr iv
iver airbag
er airbag shut
shuto.
o.
Fu nction of co-driver airbag shuto........... 49 Ind
ex
445
445

Wi
ndo ws................................................ 312
Wi per blades.......................................... 312
Car
Car pe
pet (Car
t (Car e)
e)............................................... 314
Changing g
Changing g ears
ears
Manually................................................ 170
Changing hub caps
Changing hub caps ....................................... 347
Char
Char ging
ging
Mobile phone (wireless)........................ .123
On-board electrical system battery
(12 V).................................................... 327
USB port................................................1 23
Chassis
Chassis
Damping characteristics........................ .218
DY NAMIC BODY CONTROL................... .218
Chassis lev
Chassis lev el (AIR BOD el (AIR BOD Y C
Y CONTR
ONTR OL)
OL)
Setting................................................... 220
Child safe
Child safe ty lock
ty lock
Re ar side wind ows................................... 71
Child seat
Child seat
Appr oval catego ries.................................59
At tach ing (no tes)..................................... .58
Basic instructions.................................... 54
Fr ont passenger seat (no tes).................... 69 Fr
ont passenger seat (without auto-
matic airbag shuto.)............................... .68
ISOFIX/i-Size (/tting).............................. .62
No tes on risks and danger s...................... 55
Re commendations forch ild restraint
systems................................................... 57
Seats suitable for belt-secured child
re straint systems..................................... 66
Seats suitable for i‑Size child restraint
systems................................................... 62
Seats suitable for ISOFIX child
re straint systems..................................... 61
Securing on the co-driver seat..................70
Securing on there ar seat......................... 67
To pTe ther................................................ 64
Childr
Childr en
en
Av oiding dangers in theve hicle............... .55
Basic instructions.................................... 54
Chock Chock Storage location..................................... 346
Chock Chock see Chock
City lighting
City lighting.................................................. 130 Cleaning
Cleaning
see Care
Climat
Climat e contr
e contr ol
ol
Ac tivating/deactivating.......................... 144
Ac tivating/deactivating the A/C func-
tion (control panel).................................1 44
Ac tivating/deactivating the A/C func-
tion (MBUX multimedia system).............. 145
Ac tivating/deactivating the synchro-
nisation function (control panel).............1 45
Ac tivating/deactivating the synchro-
nisation function (MBUX multimedia
system).................................................. 146
Air-recirculation mode............................1 46
Au tomatic control................................. .145
Calling up the air conditioning menu....... 144
Climate style function............................ 145
Demisting the windscreen...................... 143
Demisting windo ws................................ 146
Fr ont air vents........................................ 152
Inserting/removing the 0acon (fra-
gr ance system)...................................... 147
Ionisatio n.............................................. .146
No te...................................................... 143
Re ar air vents......................................... 152 448 448
Ind
ex