2021 MERCEDES-BENZ E-CLASS CABRIOLET warning

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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
417
417

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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. 418 418
Display message
s andwarning/indicator lamps

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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 326).
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
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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
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419

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Tyre press. monitor inoper-
ative No wheel sensors *T
he wheels /tted do not ha vesuitable tyre pressure senso rs. The tyre pressure monitoring system is deactivated. #
Fit wheels with suitable tyre pressure sensors.
h
Wheel sensor(s) missing *T
here is no signal from the tyre pressure sensor of one or more wheels. No pressure value is displa yedfo rth e a.ected
tyre. #
Have thefa ulty tyre pressure sensor replaced at a quali/ed specialist workshop.
h
Check tyre(s) *T
he tyre pressure in one or more tyres has dropped signi/cantl y.
The wheel position is displa yed. A warning tone also sounds. &
W WARNI NG
ARNI NGRisk of an accident due toinsu1cient tyre pressure
R The tyres can burst.
R The tyres can wearexcessively and/or une venly.
R The driving characteristics as well as the steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. #
Obser vethere commended tyre pressures. #
Adjust the tyre pressure if necessar y. #
Stop theve hicle in accordance with the tra1c conditions. #
Check the tyre pressure (/ page 337) andthe tyres. 420
420
Display messages and
warning/indicator lamps

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h
Rectify tyre pressure *T
he tyre pressure is too low in at least one of the tyres, or the di.erence in tyre pressure between the individual
wheels is toogr eat. #
Check the tyre pressure and add air, if necessar y. #
When the tyre pressure is cor rect, restart the tyre pressure monitoring system (/ page 340).
h Warning tyre defect *T
he tyre pressure in one or more tyres has dropped suddenl y.The wheel position will be displa yed. &
W
WARNING
ARNING Risk of an accident from driving with a 0at tyre
R The tyres can overheat and be damaged.
R The driving characteristics as well as the steering and braking characteristics may be greatly impaired.
Yo u could then lose control of theve hicle. #
Do not drive with a 0at tyre. #
Do not exceed the maximum permissible driving distance in emer gency mode and the maximum permissible
speed with a 0at MOExtended tyre. #
Obser vethe no tes on 0at tyres. No
tes in theev ent of a 0at tyre (/ page 317). #
Stop theve hicle in accordance with the tra1c conditions. #
Check the tyres. Display messages and
warning/indicator lamps
421
421

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Tyre(s) overheated *At least one tyre is overheating. The a.ected tyres are displa yed in red. At temp eratures close tothe limit value, the
tyres are displa yed in yello w. &
W
WARNI NG
ARNI NGRisk of an accident from driving with overheated tyres
Overheated tyres can burst. #
Reduce speed so that the tyres cool down. Reduce speed
*At least one tyre is overheating. The a.ected tyres are displa yed in red. At temp eratures close tothe limit value, the
tyres are displa yed in yello w. &
W
WARNI NG
ARNI NGRisk of an accident from driving with overheated tyres
Overheated tyres can burst. #
Reduce speed so that the tyres cool down. T
T
yr
yr e pr
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essur e loss w
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arning syst
ning syst em
em Displa
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Tyre pressure Check tyres *The tyre pressure loss warning system has de tected a signi/cant loss of pressure. 422
422
Display messages and
warning/indicator lamps

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W
WARNING
ARNING Risk of an accident due toinsu1cient tyre pressure
R The tyres can burst.
R The tyres can wearexcessively and/or une venly.
R The driving characteristics as well as the steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. #
Obser vethere commended tyre pressures. #
Adjust the tyre pressure if necessar y. #
Stop theve hicle in accordance with the tra1c conditions. #
Check the tyre pressure (/ page 337) andthe tyres. #
When the tyre pressure is cor rect, restart the tyre pressure loss warning system (/ page 340).
Check tyre pressures then
restart Run Flat Indicator *T
he tyre pressure loss warning system generated a display messa geand has not been restar ted since. #
When the tyre pressure is cor rect, restart the tyre pressure loss warning system (/ page 340).
Run Flat Indicator inopera-
tive *T
he tyre pressure loss warning system is malfunctioning. #
Consult a quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
423 423

Exhaus
Exhaust g
t gas
as aTer
aTer tr
treatment
eatment Displa
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Ø
Refill AdBlue See Owner’s
Manual *
The AdBlue ®
leve l has fallen into there ser verange. #
Top up AdBlue ®
immediately (/ page 175).
Ø Top up AdBlue Emergency
op. in XXX miles See Own-
er's Manual *
The low AdBlue ®
leve l will lead tolimited per form ance aTer there maining distance displa yed has been co vered. #
Top up AdBlue ®
immediately (/ page 175).
Ø XX,X l Top up AdBlue Emer.
op.: max. XXX km/h Start
not poss. in XXX km *
The low AdBlue ®
leve l will lead tolimited per form ance from the speed displa yed.
ATer there maining distance displa yed has been co vered, it will no longer be possible tostart theve hicle. #
Add at least the amount of AdBlue ®
displa yed (/ page 175). 424 424
Display messages and
warning/indicator lamps