steering MERCEDES-BENZ E-CLASS CABRIOLET 2020 Service Manual

8
Selected transmission position
9 Multifunction displ ay(exa mp le:standard dis‐
play for a trip): assi stance / telephone /
navigation / trip / media / radio / styles
and displa ys/ service / possible settings
fo r head-up display
A Fuel le vel and fuel filler flap location indica‐
tor Overview of
the but tons on thest eering
wheel
Depending on the equipment, the la yout and the
design of the control elements on thesteering
wheel may dif fer. 1
Control panel for cruise control/limiter or
Ac tive Dis tance Assi stDISTRONIC
(/ page 192)
2 G Back button, on-board compu ter
3 Touch Control, on-board co mputer
Swipe (navigate)
Press a(confirm)
4 ò Main menu, on-board co mputer 5
ò Main menu, MBUX multimedia sy stem
6 Touch Control, MBUX multimedia sy stem
Swipe (navigate)
Press (confirm)
7 G Back button, MBUX multimedia sy stem
8 Control panel forth e MBUX multimedia sys‐
tem
£ LINGU ATRO NIC
9 Toadjust the brightness of the instrument
lighting Operating
the on-boa rdcompu ter
Obser vethe legal requ irements forth e count ry
in which you are cur rently driving when operat‐
ing the on-board computer. Instrument display and on-board computer
243

Fu
ll-screen menus
Yo u can displ aythefo llowing menus full-screen
on the instrument display:
R Assistance
R Trip
R Navigation #
Onthe cor responding menu, use the left-
hand Touch Control toscroll tothe end of the
list. #
Press the left-hand Touch Control.
The selected menu will be displ ayed full-
screen. Overview of displa
yson the multifunction
display
Displa yson the multifunction display
u Active Parking Assist activated
(/ page 221)
é Parking Assist PARKTRONIC deacti vated
( / page 211)
h Cruise control (/ page191) È
Limi
ter (/ page191)
ç Active Dis tance Assi stDISTRONIC
(/ page 194)
ê Active Brake Assi st (/ page 190)
à Active Steering Assist (/ page 201)
¬ Active Traf fic Jam Assi st (/ page 203)
à Ac
tive Lane Keeping Assist (/ page 231)
è ECO
start/ stop function (/ page158)
ë HOLD fu
nction (/ page 204)
_ Ad
aptive Highbeam Assist (/ page127)
Ad aptive Highbeam Assist Plus
(/ page 128)
ð Maximum pe rmissible speed exceeded
(for cer tain countries only)
Ve hicles with Traf fic Sign Assis t:de tected
instructions and traf fic signs (/ page 226).
Fo r an overview of the indicator and warning
lamps, see (/ page415). Head-u
p Display Fu
nction of the head-up display *
NO
TEMercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. The head-up displ
ayprojects thefo llowing infor‐
mation abo vethe cockpit into the driver's field
of vision, forex ample:
R Driving speed
R Info rm ation from the navigation sy stem
R Information from the driving sy stems and
driving saf ety sy stems
R Some warning messages
Depending on theve hicle's equipment, dif fere nt
content can be shown in theth re e areas of the
head-up display (/ page246). Instrument display and on-boa
rdcompu ter245

#
Dial the emer gency number 11 2onyour
mobile phone.
If an eme rgency call has been initiated:
R Remain in theve hicle if thero ad and traf fic
conditions permit youto do so until a voice
connection is es tablished with the emer‐
ge ncy call centre operator.
R Based on the call, the operator decides
whe ther it is necessary tocall rescue teams
and/or the police tothe accident site.
R If no vehicle occupant answers, an ambu‐
lance is sent totheve hicle immediately. Tr
iggering a manual Mercedes-Benz emer‐
ge ncy call #
Touse the SOS but ton in theov erhead
control panel: press and holdthe SOS but‐
to nfo r at least one second (/ page 269).#
Touse voice control: usethe LINGUA‐
TRONIC voice commands . The emer
gency call has been made:
R Avo ice connection is made tothe Mercedes-
Benz emer gency call centre.
R A messa gewith accident data is transmit ted
to the Mercedes-Benz emer gency call centre.
The Mercedes-Benz eme rgency call cent re
can transmit theve hicle position data toone
of the public emer gency services call cen‐
tres.
R Under cer tain circums tances da tais also
transmitte d inthevo ice channel tothe
Mercedes-Benz emer gency call centre.
This allo wsmeasu resfo rre scue, reco very or
to wing toa Mercedes-Benz Service Cent reto
be initiated quickl y.
R Remain in theve hicle if thero ad and traf fic
conditions permit youto do so until a voice
connection is es tablished with the emer‐
ge ncy call centre operator.
R Based on the call, the operator decides
whe ther it is necessary tocall rescue teams
and/or the police tothe accident site. If
th e Mercedes-Benz emer gency call sy stem
cann otconnect tothe Mercedes-Benz emer‐
ge ncy call centre, the emer gency call is au tomat‐
ical lysent tothe public emer gency services call
centre.
If no connection can be made tothe public
emer gency services, a cor responding message
appears inthe media displa y. #
Dial the emer gency number 11 2onyour
mobile phone.
Ending an unin tentionally triggered manual
Mercedes-Benz emer gency call #
On the multifunction steering wheel:
select ~. Data transfer of
the Mercedes-Benz emer‐
ge ncy call sy stem In
theeve nt of an au tomatic or manual emer‐
ge ncy call thefo llowing data is transmitte d,for
ex ample:
R Vehicle's GPS position data
R GPS position data on thero ute
(a few hund red metres before the incident) 278
MBUX multimedia sy stem

R
Direction of tr avel
R Vehicle identification number
R Vehicle drive type
R Number of people de term ined tobe in the
ve hicle
R Whe ther Mercedes me connect is available
or not
R Whe ther the emer gency call was initiated
manually or automatically
R Time of the accident
R Language setting on the multimedia sy stem
Fo r accident clarification purposes, thefo llowing
measures can be take n up toan hour af terthe
emer gency call has been initia ted:
R The cur rent vehicle position can be de ter‐
mined.
R Avo ice connection totheve hicle occupants
can be es tablished.
% ForRu ssia: various functions, e.g. receiving
traf fic information, cannot be per form ed for
up totwo hou rsafte r sending an emer gency
call. Fu
nction of the emer gency call sy stem self-
diagnosis (Russia) Yo
ur car verifies the operability of the emer‐
ge ncy call sy stem each time the ignition is ON.
In case of sy stem failure, you will be informed
with text messa geon the instrument clus ter and
with red indicator SOS NOT READY onthe dis‐
pla y.
Please, make sure, that during 30 seconds af ter
switching ignition ON there d indicator SOS
NOT READY inthe upper right corner of display
is switched OFF, this means the emer gency call
sy stem passed diagnostics successfully. St
arting/ending ERA-GLONASS test mode
(Russia) Re
quirements:
R The star ter battery is suf ficiently charge d.
R The ignition is switched on.
R The vehicle has been stationary for at least
one minute. #
Tostart thete st mode: press and hold the
~ button on the multifunction steering
wheel for at least five seconds.
The test mode is star ted and automatically
ends af terth e language test has been per‐
fo rm ed. #
Toend thete st mode manuall y:switch off
th e ignition.
The test mode is ended. MBUX multimedia sy
stem 279

ASS
YST PLUS se rvice inter val display Fu
nction of the ASS YST PLUS se rvice inter val
displ ay The ASS
YST PLUS service inter val display on the
instrument display pr ovides information on the
re maining time or dis tance be fore the next
service due date.
Yo u can hide this service display using the back
button on the left-hand side of thesteering
wheel.
Depending on how theve hicle is used, the
ASS YST PLUS service inter val display may
shor tenth e service inter val, e.g. in thefo llowing
cases:
R mainly short-dis tance driving
R when the engine is of ten le ftidling for long
periods
R intheeve nt of frequent cold start phases
R vehicles with a diesel particulate filter: in
th eev ent of frequently inter rupted rege nera‐
tion of the diesel particulate filter Mercedes-Benz
recommends avoiding such
operating conditions.
Yo u can obtain information concerning the serv‐
icing of your vehicle from a qualified specialist
wo rkshop, e.g. a Mercedes-Benz Service Centre. Displaying
the service due da te On-board computer:
4 Service 5
ASSYST PLUS
The next service due date is displa yed. #
Toexitth e displa y:press the back button
on the left-hand side of thesteering wheel.
Bear in mind thefo llowing related topic:
R Operating the on-board computer
(/ page 243). Infor
mation on regular maintenance work *
NO
TEPremature wearthro ugh failure to
obser veservice due dates Service
workwhich is not car ried out at the
ri ght time or incomple tely can lead to
inc reased wear and damage totheve hicle. #
Alw ays obser vethe prescribed service
inter vals. #
Alw ays ha vethe prescribed service
wo rkcar ried out at a qualified specialist
wo rkshop. Special service
requ irements The prescribed service inter
val is based on nor‐
mal operation of theve hicle. Maintenance work
will need tobe per form ed more of ten if theve hi‐
cle is operated under arduous conditions or
increased loads.
The ASS YST PLUS service inter val display is only
an aid. The driver of theve hicle bears responsi‐
bility as rega rdsto whe ther maintenance work
needs tobe per form ed more of tenth an speci‐ 288
Maintenance and care

#
Left-hand drive vehicle: pulltab1
upwards. #
Remo vefire extinguisher 2. Flat tyre
Note
s onflat tyres &
WARNING Risk of accident due toaflat
tyre
A flat tyre se verely affects the driving charac‐
te rist ics as well as thesteering and braking
of theve hicle. Ty
res without run-flat characteristics: #
Do not drive with a flat tyre. #
Chan getheflat tyre immediately with
an emer gency spa rewheel or spare
wheel. Alternativel y,consult a qualified
specialist workshop.
Ty res with run-flat characteristics: #
Obse rveth e information and warning
no tes on MOExtended tyres (run-flat
tyres). In
theeve nt of a flat tyre, thefo llowing options
are available depending on your vehicle's equip‐
ment:
R Vehicles with MOExtended tyres: it is pos‐
sible tocontinue the journey for a short
period of time. Make sure you obse rvethe
no tes on MOExtended tyres (run-flat tyres)
(/ page 306).
R Vehicles with a TIREFIT kit: you can repair
th e tyre so that it is possible tocontinue the
jou rney for a short period of time. Todo this,
use the TIREFIT kit (/ page 308). R
Vehicles with Mercedes me connect: you
can make a call for breakdown assi stance via
th eov erhead control panel in the case of a
breakdown (/ page 269).
R Allvehicles: change the wheel
(/ page 335). Note
s on MOExtended tyres (run-flat tyres) &
WARNING Risk of accident when driving
in li mp-home mode
Driving in emergency mode impairs the han‐
dling characteristics of theve hicle. #
Do not exceed the permissible maxi‐
mum speed of the MOEx tended tyres. #
Avoid any abrupt steering and driving
manoeuvres as well as driving over
obs tacles (kerbs, pot holes, off-road).
This applies, in pa rticular, toa loaded
ve hicle. #
Stop driving in the emer gency mode if
yo u notice: 306
Breakdown assis tance

#
Toreduce the tyre pressure: press pres‐
su re re lease button 1next tomanome ter
2 . #
When the tyre pressure is cor rect, unscr ew
th efilling hose from theva lve of the sealed
tyre. #
Screw theva lve cap onto theva lve of the
sealed tyre. #
Pull the tyre sealant bottle out of the tyre
inflation compressor.
The filling hose stay s on the tyre sealant bot‐
tle. #
Drive tothe nearest qualified specialist work‐
shop and ha vethe tyre, tyre sealant bottle
and filling hose replaced there. Batte
ry(vehicle) Note
s onthe12 V battery &
WARNING Risk of an accident due to
wo rkcar ried out incor rectly on the bat‐
te ry
Wo rkcar ried out incor rectly on the battery
can, forex ample, lead toa short circuit. This
can restrict functions releva nt for saf ety sys‐
te ms and impair the operating saf ety of your
ve hicle.
Yo u could lose cont rol of theve hicle in the
fo llowing situations in particular:
R when braking
R intheeve nt of ab rupt steering manoeu‐
vres and/or when theve hicle's speed is
not adap tedto thero ad conditions #
Intheeve nt of a sho rtcircuit or a simi‐
lar incident, contact a qualified special‐
ist workshop immediately. #
Do not drive on. #
Alw ays ha vewo rkon the battery car ried
out at a qualified specialist workshop. R
Further information on ABS (/ page182)
R Further information on ESP ®
(/ page 183)
Fo r saf etyre asons, Mercedes-Benz recommends
th at you on lyuse bat teries which ha vebeen tes‐
te d and appr ovedfo ryo ur vehicle byMercedes-
Benz.
All vehicles except vehicles with a lithium-
ion battery &
WARNING Risk ofexplosion due toelec‐
tros tatic charge
Electros tatic charge can igni tethe highly
ex plosive gas mixture in the batter y. #
Todischar geany electros tatic charge
th at may ha vebuilt up, touch the me tal 312
Breakdown assis tance

Fo
rto wing, use a tow rope or tow bar with bo th
axles on the ground. Do not use tow bar sys‐
te ms.
* NO
TEDama getotheve hicle due to tow‐
ing away incor rectly #
Obser vethe instructions and no tes on
to wing away. Ve
hicles with automatic transmission
Bo th axles on
th e ground Ye
s, max. 50 km at 50 km/h
Fr ont axle
ra ised No
Re ar axle
ra ised Ye
s, if thesteering wheel is
fi xe d in the cent reposition
with a steering wheel lock 4MATIC
vehicles
Bo th axles on
th e ground Ye
s, max. 50 km at 50 km/h
Fr ont axle
ra ised No
Re ar axle
ra ised No To
wing with a raised axle: towing should be
per form ed byato wing compan y. To
wing theve hicle with bo thaxles on the
gr ound #
Obser vethe no tes on the permitted towing
me thods (/ page317). #
Make sure that the battery is connected and
ch arge d.
Obser vethefo llowing points when the battery is
dischar ged:
R the engine cann otbe star ted R
the electric parking brake cann otbe released
or applied
R vehicles with automatic transmission: the
automatic transmission cannot be shif tedto
position iorj
% Vehicles with automatic transmission: if
th e automatic transmission cann otbe shif‐
te dto position i, orthe multifunction dis‐
play in the instrument clus ter does not show
anything, ha vetheve hicle transpor tedaw ay
( / page 320). A towing vehicle with lifting
equipment is requiredforve hicle transpor ta‐
tion.
* NO
TEDama gedue to to wing away at
exc essively high speeds or over long dis‐
ta nces The driv
etra in could be damaged when tow‐
ing at excessively high speeds or over long
dis tances. #
Atowing speed of 50 km/h must not
be exc eeded. 318
Breakdown assis tance

#
Atowing dis tance of 50 km must not be
exc eeded. &
WARNING Risk of accident when towing
a ve hicle which is too heavy
If ano ther vehicle is tow- star ted or towed
aw ay, its weight must not exceed the permis‐
sible gross mass of your ow nve hicle, other‐
wise thefo llowing could occur:
R theto wing eye may become de tach ed.
R theve hicle/trailer combination may
swer veoreve nov erturn. #
If ano ther vehicle is tow- star ted or
to we daw ay, its weight must not exceed
th e permissible gross mass of your own
ve hicle. If a
vehicle must be tow- star ted or towe daw ay,
its permissible gross weight must not exceed the
permissible gross weight of theto wing vehicle. #
Information on the permissible gross mass of
th eve hicle can be found on theve hicle iden‐
tification plate (/ page 343). #
Vehicles with automatic transmission: do
not open the driver's door or front passenger
door, otherwise the automatic transmission
automatically shifts toposition j. #
Fittheto wing eye (/ page 321). #
Fasten theto w bar.
* NO
TEDama gedue toincor rect connec‐
tion of theto w bar #
Onlyconnect theto w rope or tow bar to
th eto wing eyes. #
Deactivate the automatic locking mechanism
(/ page 77). #
Do not activate the HOLD function. #
Deactivate tow- aw ay protection
(/ page 94). #
Deactivate Active Brake Assi st
( / page 190). #
Vehicles with automatic transmission:
shift the automatic transmission toposition
i. #
Release the electric parking brake. &
WARNING Risk of accident due tolimi‐
te d saf ety-re lated functions during the
to wing process
Saf ety-re lated functions are limited or no lon‐
ge rav ailable in thefo llowing situations:
R the ignition is switched off.
R the brake sy stem or po werst eering sys‐
te m is malfunctioning.
R the energy supply or the on-board electri‐
cal sy stem is malfunctioning.
When your vehicle is then towe daw ay, signif‐
icantly more ef fort may be requ ired tosteer
and brake than is no rmally requ ired. #
Use a tow bar. #
Make sure that thesteering wheel can
mo vefreely before towing theve hicle
aw ay. Breakdown assis
tance 319

ing condition (/
page 327). Observethe
no tes on tyre temp erature (/ page 326).
% The values displa yed in the driver display
may deviate from those of the tyre pressure
ga uge as they referto sea le vel.At high ele‐
va tions, the tyre pressure values indicated
by a pressure gauge are higher than those
shown bythe driver displa y.In this case, do
not reduce the tyre pressure.
Re starting the ty repressure moni toring sys‐
tem
Re quirements:
R The recommended tyre pressure is cor rectly
set forth ere spective operating status on all
of the wheels (/ page 326).
Re start the tyre pressure monitoring sy stem in
th efo llowing situations:
R The tyre pressure has changed.
R The wheels or tyres ha vebeen changed or
newly fitted. Driver display:
4 Service 5
Tyres #
Swipe down wards on Touch Control on the
left-hand side of thesteering wheel.
The Use current pressures as new reference
values? message is shown in the multifunc‐
tion displa y. #
Torestart, press Touch Control on the left-
hand side of thesteering wheel.
The Tyre press. monitor restarted message is
shown in the multifunction displa y.
Cur rent wa rning messages are dele ted and
th eye llow h warning lamp goes out.
Af teryo u ha vebeen driving for a few
minutes, the sy stem checks whe ther the cur‐
re nt tyre pressures are wi thin the specified
ra nge. The cur rent tyre pressures are then
accep ted as refere nce values and monitored.
Be sure toalso pay attention tothefo llowing
re lated topic:
R Notes on tyre pressure (/ page 326) Ty
re pressure loss warning sy stem Fu
nction of the ty repressure loss warning
sy stem
The tyre pressure loss warning sy stem warnsthe
driver bymeans of display messa ges when there
is a se vere tyre pressu reloss.
Sy stem limits
The sy stem may be impaired or may not function
particular lyin thefo llowing situations:
R incor rectly set tyre pressure
R sudden pressure loss caused, forex ample,
by afo re ign object penetrating the tyre
R steady pressure loss in se veral tyres
The sy stem has a restricted or del ayed function
particularly in thefo llowing situations:
R poor ground cond itions, e.g. snow or gr avel
R driving with snow chains
R when adopting a very sporty driving style
with high cornering speeds or sudden accel‐
eration
R driving with a very heavy or lar getrailer Wheels and tyres
329