warning light MERCEDES-BENZ E-CLASS CABRIOLET 2021 Service Manual

The cou
rse-cor recting brake application is availa-
ble in the speed range between app roximately
30 km/h and 200 km/h. &
W
WARNING
ARNING Risk of accident despi tebrake
application of Active Blind Spot Assist
A course-cor recting brake application cannot
alw ays pr event a collision. #
Always steer, brake or accelerate your-
self, especially if Active Blind Spot Assist
wa rnsyo u or makes a course-cor recting
brake application. #
Always maintain a safe dis tance at the
sides. If a course-cor
recting brake application occurs,
th ere dwa rning lamp 0ashes in the outside mir ror
and a warning tone sounds. In addition, display
1 indicating the danger of a side collision
appears in the Instrument Displa y.
In rare cases, the system may make an inappro-
priate brake application. This brake application
may be inter rupted at any time if you steer slightly
in the opposite direction or accelerate.
Syst
Syst em limits
em limits
No tethe system limitations of Active Blind Spot
Assist; you may otherwise not recognise the dan-
ge rs ( / page 212).
Either a course-cor recting brake application
appropriate tothe driving situation, or none at all,
may occur in thefo llowing situations:
R Vehicles or obs tacles, e.g. crash bar riers, are
located on bo thsides of your vehicle.
R Ave hicle approaches too closely on the side.
R You ha veadop ted a sporty driving style with
high cornering speeds.
R You brake or accelerate signi/cant ly.R
A driving sa fety system inter venes, e.g. ESP ®
or Active Brake Assist.
R ESP ®
is deactivated.
R A loss of tyre pressure or a defective tyre is
detected.
R You are driving with a trailer and the electrical
connection tothe trailer hitch has been cor-
re ctly es tablished.
A
A ctiv ctiv ating/deactiv
ating/deactiv ating Blind Spo
ating Blind Spo t Assis
t Assist ort or
A
A ctiv
ctiv e Blind Spo
e Blind Spo t Assist
t Assist
Multimedia system:
4 © 5
Settings 5
Assistance #
Activate or deactivate Blind Spot Assist.
or #
Activate or deactivate Act. Blind Spot Assist . A
A
ctiv
ctiv e Lane K
e Lane K eeping Assist
eeping Assist F
F
unction of A
unction of A ctiv
ctive Lane K
e Lane K eeping Assist
eeping Assist
Ac tive Lane Keeping Assist monitors the area in
front of your vehicle bymeans of the multifunction
camera (/ page 183). It ser vesto protect you
against unintentionally leaving your lane. You will 214
214
Driving and parking

5
Driven sur face depending on the cur rent
steering angle (dynamic)
6 Guide line at a distance of app roximately
0.3 m from there ar area
The colour of warning display 1/2changes
dynamically and is based on the distance tothe
de tected obs tacle:
R Blue:
Blue: no obs tacles de tected at a dis tance less
th an 1.0 m
R Y
Yellow
ellow :
:obs tacles at a dis tance between
app roximately 0.7 m and 1.0 m
R Or
Or ang
ang e:
e:obstacles at a dis tance between
app roximately 0.4 m and 0.7 m
R R
Red:
ed: obstacles at a very short dis tance of
app roximately 0.4 m or less
% V
Vehicles wit
ehicles wit h A
h Activ
ctiv e P
e Par
arking Assist
king Assist: :when
Ac tive Parking Assist is active, lane markings
4 are displa yed in green. Wi
de-angle view
1 Display of Parking Assist PARKTRONIC Tr
ailer view (vehicles with a trailer hitch)
1 Yellow guide line, locating aid 2
Red guide line at a distance of appr oximately
0.3 m from the ball head of the trailer hitch
3 Ball head of the trailer hitch
Syst
Syst em malfunction
em malfunction
If th ere ve rsing camera is not operational, the
System inoperative message appears in the
media displa y.
Syst
Syst em limits
em limits
The reve rsing camera will not function or will only
partially function in thefo llowing situations:
R The boot lid is open.
R The weather conditions are poor, e.g. heavy
ra in, sno w,fog, storm or spr ay.
R The light conditions are poo r,e.g. at night.
R Cameras, or vehicle components in which the
cameras are /tted, are damaged, dirty or co v-
ered. Obser vethe information on vehicle sen-
sors and cameras (/ page 183).
% Do not use there ve rsing camera in these
types of situations. You could otherwise injure
ot hers or collide with objects when parking
th eve hicle. 222
222
Driving and parking

If an obs
tacle in theve hicle path is de tected and
th eCamera & parking menu is not open in the
media displa y,pop-up window 1appears:
R v
v ehicles wit
ehicles wit hout A
hout Activ
ctive P
e Par
ar king Assist
king Assist: :at
speeds below 12 km/h
R v
v ehicles wit
ehicles wit h A
h Activ
ctiv e P
e Par
arking Assist
king Assist: :at speeds
below 18 km/h Optionall
y,obstacles de tected byParking Assist
PA RKTRONIC from a distance of app roximately
1.0 m in front 2and 0.7 m on the side 3can
also be displa yed in the head-up displa y.Syst
Syst em limits
em limits
Pa rking Assist PARKTRONIC does not necessarily
ta ke into account thefo llowing obstacles:
R Obstacles below the de tection range, e.g. per-
sons, animals or objects.
R Obstacles abo vethe de tection range, e.g.
ov erhanging loads, overhangs or loading
ra mp s of lor ries.
R Pedest rians or animals approaching theve hi-
cle from the side.
R Objects placed next totheve hicle.
Obs tacles on the sides are not shown in thefo l-
lowing situations, forex ample:
R You park theve hicle and switch it o..
R You open the doors.
ATer an engine start, obstacles must be de tected
again bydriving past them before a warning can
be issued.
Obser vethe information on vehicle senso rsand
cameras; the system otherwise cann otfunction
proper ly (/ page 183). V
V ehicles wit ehicles wit h tr
h trailer hitc
ailer hitc h:
h: Parking Assist
PA RKTRONIC is deactivated forth ere ar zone
when you establish an electrical connection
between your vehicle and a trailer.
Pr
Pr oblems wit
oblems wit h P
h Par
arking Assis
king Assis t P
t P ARK
ARK TR
TRONIC
ONIC 1
Vehicles with 360° Camera
2 Vehicles without 360° Camera
If th ePa rking Assist PARKTRONIC display lights
up redfo r appr oximately thre e seconds then goes
out, and theé symbol appears in the inst ru-
ment cluster, the system may ha vebeen deactiva-
te d due tosignal inter fere nce. Start theve hicle Driving and parking
229
229

Ensure
thefo llowing before starting a journe y:
R The tyre pressure on there ar axle of theto w-
ing vehicle is set for a maximum load
R The lighting of the connected trailer is opera-
tional
R V
V ehicles wit
ehicles wit hout LED headlam
hout LED headlam ps or MUL
ps or MULTI-
TI-
BEAM LED headlam
BEAM LED headlam ps:
ps:the headlamps ha ve
been set cor rectly
In theev ent of increased rear axle load, the car/
trailer combination must not exceed a maximum
speed of 100 km/h forre asons conce rning the
operating permit. This also applies in countries in
which the permissible maximum speed for car/
trailer combinations is abo ve100 km/h.
% When you are reve rsing with a trailer, remem-
ber touse theTrailer Manoeuvering Assist
function (/ page 237). F
F
olding t
olding t he ball nec
he ball nec k out and in
k out and in &
W
WARNING
ARNING Risk of accident due tothe ball
neck not being engaged
If th e ball neck is not engaged, the trailer may
come loose. #
Always engage the ball neck as descri-
bed. &
W
WARNING
ARNING Risk of injury from ball neck
swinging outwards
The ball neck may swing outwards when
unlocking or when it has not been proper ly
engaged.
There is a risk of injury within the ball neck's
ra nge of mo vement! #
Unlock the ball neck only when its range
of mo vement is unobstructed. #
Always be sure the ball neck is engaged
when folding in wards. *
N NOOTE
TE Increased risk of damage toprop-
erty due tofolded-out ball neck #
When the trailer is not coupled or the
bicycle rack is attached, fold in the ball
neck or, in the case of a fully electric
trailer hitch, retract the ball nec k. *
N
NO
OTE
TE Damage totheve hicle due toincor-
re ct use of the trailer hitch When a trailer hitch is used
toreco ver a vehi-
cle, theve hicle may be damaged in the proc-
ess. #
Use the trailer hitch only for pulling a
trailer or attaching appr oved car rier sys-
te ms (e.g. a bicycle rack ). R
R
eq
eq uir
uir ements:
ements:
R The vehicle is secured against rolling away.
R The swivel range is clear.
R The trailer cables or ada pter plugs ha vebeen
re mo ved. 240
240
Driving and parking

Coupling up/uncoupling a tr
Coupling up/uncoupling a tr
ailer
ailer&
W
WARNING
ARNING Risk of injury due toach ange
in vehicle le vel
V
V ehicles wit
ehicles wit h lev
h level contr
el contr ol:
ol:theve hicle le vel
may be changed unintentionall y,e.g. by ot her
people. If you couple or uncouple the trailer
during this time, you may become trapped. In
addition, other people could become trapped
if parts of their body are between theve hicle
body and the tyres or underneath theve hicle.
Obser vethefo llowing when coupling or
uncoupling: #
Do not open or close any doors or the
boot lid. #
Do not initiate the le vel control and do
not operate theDY NAMIC SELECT
switch. #
Do not lo ckor unlock theve hicle. R
R
eq
eq uir
uir ements:
ements:
R The ball neck is extended and engaged in a
securely loc ked position. Tr
ailers with a 7-pin plug can be connected tothe
ve hicle with thefo llowing adap ters:
R Adapter plug
R Adapter cable
The trailer will be cor rectly de tected bytheve hi-
cle only if thefo llowing conditions are met:
R The trailer is connected cor rectl y.
R The trailer lighting system is in working order.
The functions of thefo llowing systems will be
a.ec tedbya cor rectly connected trailer:
R ESP ®
trailer stabilisation
R Trailer Manoeuvering Assist
R Active Lane Keeping Assist
R Parking Assist PARKTRONIC
R Active Parking Assist
R Blind Spot Assist or Active Blind Spot Assist
R Drive Away Assist
R Cross Tra1c Ale rt
R Reversing camera
R 360° camera R
AIR BODY CONTROL
Coupling up a tr
Coupling up a tr ailer
ailer
* NO
NOTE
TEDamage tothe star ter battery due
to full dis charge Charging
the trailer battery using the po wer
supply of the trailer can damage the star ter
batter y. #
Do not use theve hicle's po wer supply to
ch arge the trailer batter y. #
Remo vethe co ver cap from the ball head and
store it in a safe place. #
Position the trailer on a le vel sur face behind
th eve hicle and couple it up totheve hicle. 242
242
Driving and parking

#
Open the soc ket cap. #
Inse rtthe plug with lug 1ingroo ve 3 on
th e soc ket. #
Turn bayonet coupling 2totheright as far as
it will go. #
Let the cap engage. #
Secure the cable tothe trailer with cable ties
(only if you are using an adap ter cable). #
Make sure that the cable is alw ays slack for
ease of mo vement during cornering. Under
thefo llowing conditions, a message may
appear on the inst rument display even if the
trailer has been connec ted cor rectl y:
R LEDs ha vebeen ins talled in the trailer lighting
system.
R The cur rent has fallen below the trailer lighting
system's minimum cur rent (50 mA).
% Accessories can be connected tothe perma-
nent po wer supply up to180 W and tothe
po we r supply that is switched on via the igni-
tion loc k.
U
U ncoupling a tr
ncoupling a tr ailer
ailer &
W
WARNI NG
ARNI NGRisk of being crushed and
becoming trapped when uncoupling a
trailer
When uncoupling a trailer with an engaged
inertia-activated brake, your hand may
become trapped between theve hicle and the
trailer dr awbar. #
Do not uncouple trailers with an engaged
ove rrun brake. *
N NOOTE
TE Damage when uncoupling in a state
of ove rrun Uncoupling in a state of
overrun can damage
th eve hicle. #
Do not uncouple trailers with an engaged
ove rrun brake. &
W
WARNING
ARNING Risk of becoming trapped when
disconnecting the trailer cable
V
V ehicles wit
ehicles wit h lev
h level contr
el contr ol syst
ol system:
em:Thevehicle
may lo wer when the trailer cable is disconnec-
te d.
This could result in you or other people
becoming trapped if your or their limbs are
between theve hicle body and the tyres or
underneath theve hicle. #
Make sure that nobody is underneath the
ve hicle or in the immediate vicinity of the
wheel ar ches when you disconnect the
trailer cable. #
Secure the trailer against rolling away. Driving and parking
243
243

S
S
t
tar
ar ting LIN
ting LIN GUA
GUATR
TRONIC
ONIC #
Press 1.
or #
Say "Hello Mercedes". Inf
Inf
or
ormation on
mation on pr
pro/les,
o/les, t
themes, sugg
hemes, sugg es
estions and
tions and
fav
fav our
our it
ites
es Fo
r electrically adjustable seats obser vethefo l-
lowing no tes. &
W
WARNING
ARNING Risk of becoming trapped dur-
ing adjustment of the driver's seat aTer
calling up a driver pro/le
Selecting a user pro/le may trigger an adjust-
ment of the driver's seat tothe position sa ved
under the user pro/le. You or other vehicle
occupants could be injured in the process. #
Make sure that when the position of the
driver's seat is being adjus ted via the
multimedia system, no people or body
parts are in the seat's range of mo ve-
ment.
If th ere is a risk of someone becoming trap-
ped, stop the adjustment process immedi-
atel y: #
a)Tapth ewa rning message onthe
media displa y. or
#
b) Press a memory function position but-
ton or a seat adjustment switch on the
driver's door.
The adjustment process will be stopped. The driver's seat is equipped with an access pre-
ve
nter.
If th e driver's door is open, the driver's seat will
not not be set aTer calling up the driver's pro/le.
Pro/les store your vehicle settings and settings
fo rth e multimedia system. If theve hicle is used
by several drivers, the driver can select their own
pro/le without changing the stored pro/le settings
of other drivers.
% Information on pro/les from Mercedes me
connect can be found in the Digital Opera-
to r's Manual.
Ve hicle settings are, forex ample, driver's seat,
steering wheel and mir ror settings, climate control
and ambient lighting. Forth e settings of the multi-
media system, you can select, forex ample, radio
stations, pr evious destinations as well as themes,
suggestions and favo urites. 260 260
MBUX multimedia system

Then,
you can select a service and be connected
to a specialist at the Mercedes-Benz Customer
Centre.
Calling t Calling t he Mer
he Mercedes-Benz Cust
cedes-Benz Cust omer Centr
omer Centre
eaTer
aTer
aut
aut omatic accident or br
omatic accident or br eakdo
eakdown det
wn det ection
ection
R
R eq
eq uir
uir ements:
ements:
R The vehicle has de tected an accident or break-
down situation.
R The vehicle is stationar y.
R The hazard warning lights are switched on.
% This function is not available in all countries.
The vehicle can de tect accident or breakdown sit-
uations under cer tain circumstances.
In theev ent an accident or breakdown is de tec-
te d, the emer gency guide sh ows saf ety no tes in
th e multimedia system displa y.
ATer quitting the emer gency guide display on the
multimedia system, a prom ptappears asking
whe ther youwo uld like toget support from the
Mercedes-Benz Customer Centre. #
Select Call.
R ATer your ag reement, or if the Mercedes
me connect service "Accident and Break-
down Management" is active, theve hicle
data is transfer red automatically
(/ page 282).
R The Mercedes-Benz Customer Centre
ta ke syo ur call and or ganises the break-
down and accident assistance.
Yo u may be charge dfo rth ese services.
% Depending on the se verity of the accident, an
automatic emer gency call can be initia ted.
This has priority over all other active calls.
% In addition, if the Mercedes me connect
service "Telediagnostics" is active, a similar
prom ptcan appear aTer a delay in theev ent
of a breakdown. If you are already in contact
with the Mercedes-Benz Customer Centre or
ha ve already received support, this prom pt
can be ignored or declined.
% Ifyo u answer the prom ptfor support from the
Mercedes-Benz Customer Centre with Later,
th e message will be hidden and appear again
later. The prom
pttriggered bythe Mercedes me
connect service "Telediagnostics", can either
be con/ rmed or declined. ATer being
declined, this will not be shown again.
Arr Arr anging a ser
anging a ser vice appointment via a Mer
vice appointment via a Mer cedes
cedes
me call
me call
If yo u ha veactivated the maintenance manage-
ment service, releva nt vehicle data is transfer red
automatically tothe Mercedes-Benz Customer
Centre. You will then receive individual recom-
mendations rega rding the maintenance of your
ve hicle.
Re gardless of whe ther you ha veconsen tedto the
maintenance management service, the multime-
dia system reminds you aTer a cer tain amount of
time that a service is due. A prom ptappears ask-
ing if youwo uld like tomake an appointment. #
T To arr
o arr ang
ange a ser
e a ser vice appointment
vice appointment: :select Call.
ATer your ag reement, theve hicle data is
transfer red and the Mercedes-Benz customer
centre take syo ur prefer red appointment date.
The information is then sent toyour desired
service outlet. MBUX multimedia system
279
279

R
With th e wiper arms folded out, clean the
wiper blades with a damp clo th.
% Make sure that the wiper blades are coated.
The coating can lea veresidues on a clo th. Do
not rubth e wiper blades excessively or clean
th em too oTen.
Ext
Ext er
erior lighting
ior lighting
R Clean the lenses with a wet sponge and mild
cleaning agent, e.g. car sha mpoo.
R Only use cleaning agents or cleaning clo ths
th at are suitable for plastic lenses.
Sensors
Sensors
R Clean the sensors in the front and rear bump-
ers with a soT clo thand car shampoo
(/ page 183).
R When using a high-pressure cleaner, main tain
a minimum distance of 30 cm.
Rev
Rev er
ersing camer
sing camer a and 360° Camera
a and 360° Camera
R Open the camera co ver with the multimedia
system (/ page 227).
R Use clean water and a soT clo thtoclean the
camera lens. R
Do not use a high-pressure cleane r.
T
T ailpipes
ailpipes
R Clean with a cleaning agent recommended for
Mercedes-Benz, especially in the winter and
aTer washing theve hicle.
R Do not use acidic cleaning agents.
Tr
Tr ailer hitch
ailer hitch
R Obser vethe no tes on care in the trailer hitch
manufacturer's operator manual.
R Do not clean the ball neck with a high-pres-
sure cleaner or sol vent.
R Remo vetraces of rust on the ball, forex ample,
with a wire brush.
R Remo vedirt with a lint-free clo th.
R ATer cleaning, lightly oil or grease the ball
head.
% Before using trailers with anti-torsional cou-
pling, obser vethe manufacturer's operator
manual. N No
ot
tes on car
es on car e of t
e of the int
he int er
erior
ior &
W
WARNING
ARNING Risk of injury from plastic parts
breaking o. aTer the use of sol vent-based
ca re products
Care and cleaning products containing sol-
ve nts can cause sur faces in the cockpit to
become porous. When the airbags are
deplo yed, plastic parts may break away. #
Do not use any care or cleaning products
containing sol vents toclean the cockpit. &
W WARNING
ARNING Risk of injury or fatal injuries
from bleached seat belts
Bleaching or dyeing seat belts can se verely
we aken them.
This can, forex ample, cause seat belts to tear
or fail in an accident. #
Never bleach or dye seat belts. To
avo id damage totheve hicle, obser vethefo l-
lowing no tes on cleaning and care: 312
312
Main
tenance and ca re

#
Take care toonly connect battery term i-
nals of identical polarity when receiving
starting assistance. #
Obser vethe sequence described for
connecting and disconnecting the jump
leads when receiving starting assistance. #
Do not connect or disconnect the bat-
te ry term inals while the engine is run-
ning. &
W
W ARNI NG
ARNI NGRisk of explosion due toexplo-
sive mixture of gases
An explosive mixture of gases can escape
from the battery during charging and starting
assis tance. #
Fire , naked 0ames, smoking and creating
spar ksmust be avoided. #
Make sure there is adequate ventilation. #
Do not stand overth e batter y. &
W
WARNI NG
ARNI NGRisk of explosion from a frozen
battery
A dischar ged battery may freeze at temp era-
tures slightly abo veor below freezing point.
During starting assistance or battery charging,
battery gas can be released. #
Always allow a battery tothaw before
ch arging it or per form ing starting assis-
ta nce. If
th e indicator/warning lamps in the inst rument
clus ter do not light up at low temp eratures, it is
ve ry likely that the dischar ged battery has frozen.
In this case you may neither jump-start theve hi-
cle nor charge the batter y.
The service life of a bat tery that has been thawed
may be dramatically shor tened. The starting char-
acteristics may be impaired, especially at low
te mp eratures.
It is recommended that you ha veath awe d battery
ch ecked at a quali/ed specialist workshop. All v
All v ehicles
ehicles
* NO
NOTE
TEDamage caused bynume rous or
ex tended attem ptsto start the engine Numerous or
extended attem ptsto start the
engine may damage the catalytic con verter
due tonon-combusted fuel. #
Avoid numerous and extended attem pts
to start the engine. Obser
vethefo llowing points during starting assis-
ta nce and when charging the batter y:
R Only use undamaged jump lead/charging
cables with a su1cient cross-section and
insulated term inal clamps.
R Non-insulated parts of thete rm inal clamps
must not come into contact with other me tal
parts while the jump lead/charging cable is
connected tothe battery/jump-start connec-
tion point.
R The jump lead/charging cable must not come
into contact with any parts which may mo ve
when the engine is running. Breakdown assistance
325 325