air condition MERCEDES-BENZ SL ROADSTER 2019 Owner's Manual

Qualified
specialist workshop ........... 28 R
RACE START
Import antsafety notes.................. 166
RACE START (Mercedes-AMG
vehicles) ............................................. 166
RACE TIMER (on-board computer,
Mercedes-AMG vehicles).................. 203
Rad io
Select ingastation .........................1 95
see Digita lOpera tor'sManu al
Radio mode
see also Digita lOpera tor'sMan-
ua l....... ..................... ......................243
Radio-w averece ption/ transmis-
sio nin the vehi cle
Decla rationof conformity ................27
REA CHRegul ation ...............................28
Readin glamp .....................................112
Rear foglamp
Displ aymessa ge....... ..................... 217
Rear lamps
see Ligh ts
Rear viewcamera
Cl eani nginstructio ns....... .............. 275
Displ ayinthe multimedi asys tem ..180
Function/notes .............................179
Switchi ngon/off ........................... 180
Rear window defros ter
Gene ralnotes ................................ 121
Prob lem(malfunction) ................... 121
Switchi ngon/off ........................... 121
Rear-vie wmirror
Dippi ng(automa tic)....... ................106
Refrig erant(air-conditioningsys-
tem)
Importa ntsafe tynotes .................. 326
Refue ling
Fuel gauge....... ................................ 33
Importa ntsafe tynotes .................. 144
Ref ueling proces s....... ................... 145
see Fuel
Remote control
Progra mming (garage door
opene r)....... ................................... 260 Replac
ingbulb s
Gene ralnotes ................................ 113
Reportin gsafety defects....... ............. 29
Resc uecard ......................................... 29
Rese rve(fue ltank)
see Fuel
Rese rvefuel
Displ aymessa ge....... ..................... 221
Warni nglamp ....... .......................... 239
Resi dual heat (climate control) ........122
Restrain tsyste m
Displ aymessa ge....... ..................... 214
Introducti on....... ..............................40
Warni nglamp ....... .......................... 238
Warni nglamp (function) ................... 41
Reve rsegear (selector lever) ....... ....136
Reve rsing feature
Side windows ................................... 87
Trunk lid....... ....................................82
Reve rsinglamps (displa ymes-
sag e)<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011[ <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011[ 217
Roads ideAssistanc e(b reakdo wn).... 26
Rol lbar
Disp laymess age<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011001100110011[ 213
Ope ration<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> 52
Rol lersun blind<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011> 94
Roo f
Disp laymes sage <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011001100110011[ 230
Imp orta ntsafety notes <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011[ 90
Ope ning/ closing (with roo f
sw itch) <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011> 91
Ope ning/ closing (with Smar tKey).... 92
Ove rview <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> 90
Pro blem (ma lfunction) <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011[ 95
Re locking <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> 92
Roo fsw itch<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> 91
Route guidanc e
see also Digi talOpe rator'sMan-
ua l<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011[ 243
Route guidanc eacti ve<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011[ 194 S
Safe ty
Ch ildre nin the vehicle<0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011[ 57
see Occu pant safety
Safe tysys tem
see Drivi ngsafety system s 16
In
dex

Protecting
theenvironment General
notes H
Environmental
note
Daimler's declaredpolicyisone ofcompre-
hensive environm entalprotect ion.
The object ivesareforthe natural resources
that form thebasis ofour existen ceon this
planet tobe used sparingly andinamanner
that takes therequirements ofboth nature
and humanity intoaccount.
You toocan help toprotect theenvironm ent
by operating yourvehicle inan environm en-
tally responsible manner.
Fuel consumpt ionand therate ofengine,
transm ission,brakeandtirewear areaffec-
ted bythese factors:
R operating conditionsof your vehicle
R your personal drivingstyle
You caninfluence bothfactors. Youshould
bear thefollowing inmind:
Operating conditions:
R avoid shorttripsasthese increase fuel
consumpt ion.
R alwa ysmake surethatthetire pressures
are correct .
R do not carry anyunnecessary weight.
R remove roofracks onceyounolonger
need them.
R aregularly servicedvehiclewillcont ribute
to environm entalprotect ion.You should
therefore adheretothe service intervals.
R alwa yshave service workcarried outata
quali fiedspecialist workshop.
Personal drivingstyle:
R do not depress theaccelerator pedal
when startin gthe engine.
R do not warm upthe engine whenthevehi-
cle isstationary.
R drive carefully andmaintain asafe dis-
tance fromthevehicle infront .
R avoid frequent, suddenacceleration and
braking. R
change gearingood timeanduseeach
gear onlyupto00C3 ofits maximum engine
speed.
R switch offthe engine instationary traffic.
R keep aneye onthe vehicle's fuelcon-
sumption. Environmental
concerns andrecom-
mendat ions
Wherever theoperating instructionsrequire
you todispose ofmaterials, firsttrytoregen-
erate orre-use them.Observe therelevant
environm entalrulesandregulations whendis-
posing ofmaterials. Inthis way youwillhelp to
protect theenvironm ent. Genuine
Mercedes-Benz parts H
Environmental
note
Daimler AGalso supplie srecondit ioned
major assemblies andparts which areofthe
same qualityas new parts. Theyarecovered
by the same Limited Warranty entitlements
as new parts.
! Air
bags andEmergen cyTensioning Devi-
ces, aswell ascont rolunits andsensors for
these restraint systems, maybeinstalled in
the following areasofyour vehicle:
R doors
R door pillars
R door sills
R seats
R cock pit
R instrumen tcluster
R cent erconsole
Do not install accessories suchasaudio sys-
tems inthese areas. Donot carry out
repairs orwelding. Youcould impair the
operating efficiency ofthe restraint sys-
tems.
Have aftermark etaccessories installedata
quali fiedspecialist workshop.
You could jeopardize theoperating safetyof
your vehicle ifyou useparts, tiresandwheels
as well asaccessories relevanttosafety which 24
Genuine
Mercedes-Benz partsIntrodu ction

have
notbeen approved byMercedes-Ben z.
This could leadtomalfunctions insafety-rele-
vant systems, e.g.thebrake system. Useonly
genuine Mercedes-Ben zparts orparts ofequal
qual ity.Only usetires, wheels andaccessories
that have been specifically approvedforyour
vehicle.
Genuine Mercedes-Ben zparts aresubject to
strict qualitycont rol.Every parthasbeen spe-
cifically developed, manufactured orselected
for and adapted toMercedes-Ben zvehicles.
Therefore, onlygenuine Mercedes-Ben zparts
should beused.
More than300,000 differentgenuine
Mercedes-Ben zparts areavaila blefor
Mercedes-Ben zmodels.
All authorized Mercedes-Ben zCenters main-
tain asupply ofgenuine Mercedes-Ben zparts
for necessary serviceandrepair work.Inaddi-
tion, strategically locatedpartsdelivery cen-
ters provide quickandreliabl eparts service.
Always specify thevehicle identification num-
ber (VIN) when ordering genuineMercedes-
Benz parts (Ypage 320). Operat
or'sManual Vehicle
equipment
i This
Operator's Manualdescribes allmod-
els and allstandard andoptional equipment
of your vehicle availableatthe time ofgoing
to print. Country-specific differencesare
possible. Bearinmind thatyour vehicle may
not feature allfunct ionsdescribed here.
This also appli estosafety-relevant systems
and funct ions. Theequipment inyour vehi-
cle may therefore differfromthatshown in
the descriptions andillustrations .
The original purchase agreement listsallsys-
tems installed inyour vehicle.
Should youhave anyquestions concerning
equipment andoperation, pleaseconsult an
authorized Mercedes-Ben zCenter.
The Operator's ManualandMaintenanc e
Booklet areimportant documents andshould
be kept inthe vehicle. Service
andvehicle operation Warr
anty
The implied warranty foryour vehicle applies
in accordance withthewarranty termsand
conditions inthe Service andWarranty Infor-
mation booklet.
Your authorized Mercedes-Ben zCenter will
replace andrepair allfactory-in stalledpartsin
accordance withthefollowing warrantyterms
and conditions :
R New Vehicle Limited Warranty
R Emission SystemWarranty
R Emission Performance Warranty
R Cali fornia, Connect icut,Maine, Massachu-
setts, NewYork, Pennsylvania, RhodeIsland
and Vermont Emission ControlSystem War-
ranty
R State warranty enforcem entlaws (lemon
laws)
Repla cement partsandaccessories arecov-
ered bythe Mercedes-Ben zParts andAcces-
sories warranties. Theseareavaila bleatany
authorized Mercedes-Ben zCenter.
i Should
youlose your Service andWarranty
Inform ationbooklet, haveanauthorized
Mercedes-Ben zCenter arrange fora
replacement. Thenew Service andWarranty
Inform ationbooklet willbeposted toyou. Informat
ionforcustomers inCalifor-
nia
Under California lawyou may beentit ledtoa
replacement ofyour vehicle orarefund ofthe
purchase priceorlease price, ifafter areason-
able number ofrepair attempt sMercedes-
Benz USA, LLCand/or itsauthorized repairor
service facilities failtofix one ormore sub-
stant ialdefects ormalfunctions inthe vehicle
that arecovered byits express warranty.
During theperiod of18 mont hsfrom original
delivery ofthe vehicle orthe accumulation of
29,000 km(approximately 18,000miles)on
the odometer ofthe vehicle, whichever occurs
first, areasonable numberofrepair attempt s
is presumed foraretail buyer orlessee ifone
or more ofthe following occurs:
(1) thesame substantial defectormalfunc-
tion results inacondition thatislikely to Service
andvehicl eoperat ion
25Introduct ion Z

R
malfu nctions anddefects inimporta ntsys-
tem components, e.g.lights,brakes
R vehicl ereactions andopera tingconditions
in specia ldrivi ngsitua tions, e.g.airbag
depl oyme nt,intervention ofstabi litycontrol
systems
R ambi entconditions, e.g.outsid etempera -
ture
This data isof an exclusi velytechnical nature
and canbeused to:
R assi stinrecognizing andrectifyi ngmalfu nc-
tions anddefects
R anal yzevehicl efunctions, e.g.after anacci-
dent
R optimize vehiclefunctions
The data cannot beused totrace thevehicl e's
movements.
When yourvehicl eis serviced ,technical infor-
mation canberead from theevent datamem-
ory and malfu nction datamemory .
Services include,for exampl e:
R repa irservices
R service processe s
R warra nties
R qua lityassu rance
The vehicl eis read outbyemplo yeesof the
service network (includingthemanufa cturer)
usi ng specia ldia gnostic testers. Moredetailed
informatio nis obtai nedfrom it,ifrequ ired.
After amalfu nction hasbeen rectified ,the
informatio nis dele tedfrom themalfu nction
memory oriscontinual lyoverwri tten.
When operatingthevehicl e,situa tions are
conceivab lein which thistechnical data,in
connection withother informatio n(if neces-
sary ,under consulta tionwith anauthorized
expert), couldbetraced toaperson.
Examples include:
R accide ntreports
R dama getothe vehicl e
R witness statements
Further additional functions thathave been
contractuall yagree dupo nwith thecustomer
all ow certain vehicledata tobe conveyed by
the vehicl eas wel l.The additional functions
includ e,for exampl e,vehicl elocati onincase
of an emergency . COMA
ND/Me rcedesmeconne ct
(Can ada: TELE AID)
If the vehicl eis equ ippe dwith COMAND or
Mercede sme connect, additional dataabout
the vehicl e'sopera tion,theuse ofthe vehicl e
in certain situations, andthelocatio nof the
vehicl eis compil edthrough COMAND orthe
Mercede sme connect system.
For additional informatio n,plea serefer tothe
COMAND UserManua lor Digital Operator's
Manua land/or theMercede sme connect
Terms andCondi tions. Eve
ntdata recorders
USA only:
This vehicl eis equ ippe dwith anevent data
recorder (EDR).Thisvehicl eis equ ippe dwith
an event datarecorder (EDR).Themain pur-
pose ofan EDR isto record, incertain crashor
near crash-li kesitua tions, suchasan air bag
depl oyme ntor hitting aroad obstacl e,data
that willassi stinundersta ndinghowavehi-
cle's systems performed .The EDR isdesi gned
to record datarelated tovehicl edyna mics and
safety systems forashort periodof time, typi-
call y30 seconds orless.
The EDR inthis vehicl eis desi gned torecord
such dataas:
R How varioussystems inyou rvehicl ewere
opera ting
R Whether ornot thedriver andpass enger
safety beltswerebuckle d/fastened
R How far(ifat all)the driver wasdepre ssing
the accele ratorand/or brakepedal;and,
R How fastthevehicl ewas traveli ng
These datacanhelp provid eabetter under-
standing ofthe circumstances inwhich
crashes andinjurie soccur. NOTE:EDRdata
are recorded byyou rvehicl eonly ifanon-triv-
ial crash situationoccurs; nodata arerecor-
ded bythe EDR under normal drivingcondi-
tions andnopersona ldata (e.g.name, gender,
age and crash location)are recorded .How-
ever, other parties,such aslaw enforcement
could combine theEDR data withthetype of
persona llyidentify ingdata routinel yacqu ired
duri ngacrash investiga tion.
Access tothe vehicl eand/or theEDR isnee-
ded toread datathatisrecorded byan EDR,
and specia lequ ipment isrequ ired. Inadd ition 30
Data
storageIntroductio n

The
driver's andfront -passenger kneebags
offer additional thigh,kneeandlower legpro-
tect ion.
Side impa ctair bags G
WARNIN
G
Unsuitable seatcovers canobstruct orpre-
vent deployment ofthe airbags integr ated
into theseats. Consequently, theairbags
cann otprotec tvehicle occupant sas they
are designed todo. Inaddition, theopera-
tion ofthe occupant classification system
(OCS) couldbeadversely affected.This
poses anincreased riskofinjury oreven
fatal injury.
You should onlyuseseat covers thathave
been approved forthe respect iveseat by
Mercedes- Benz. Side
impact airbags 0043deploy nexttothe
outer bolster ofthe seat backrest .
When deployed, theside impact airbag offers
additional thoraxprotection.However, itdoes
not protec tthe:
R head
R neck
R arms
If the restr aintsystem controlunit detect sa
side impact, theside impact airbag is
deployed onthe side onwhich theimpact
occurs.
The side impact airbag onthe front passenger
side deploys underthefollowing conditions:
R the OCS system detectsthat thefront
passenger seatisoccupied or
R the seat beltbuckle tongue isengaged in
the belt buckle ofthe front passenger seatIf
the belt tongue isengaged inthe belt
buckle, theside impact airbag onthe front
passenger sidedeploys ifan appropriate acci-
dent situation occurs.Inthis case, deployment
is independent ofwhether thefront passenger
seat isoccupied ornot .
Head airbags Head
bags0043deploy inthe area ofthe side
windows atthe front .
When deployed, thehead bagenhanc esthe
level ofprotec tionforthe head. However, it
does notprotec tthe:
R chest
R arms
If the restr aintsystem controlunit detect sa
side impact, thehead bagisdeployed onthe
side onwhich theimpact occurs.
If the system determin esthat they canoffer
additional protectiontothat provided bythe
seat belt, ahead bagmay bedeployed inother
accident situations (Ypage 53).
The head bagonthe front -passenger side
deploys underthefollowing conditions:
R the OCS system detectsthat thefront -
passenger seatisoccupied or
R the seat beltbuckle tongue isengaged in
the belt buckle ofthe front -passenger seat
If the belt tongue isengaged inthe belt
buckle, thehead bagonthe front -passenger
side deploys ifan appropriate accidentsitua-
tion occurs. Inthis case, deployment isinde-
pendent ofwhether thefront -passenger seatis
occupied ornot . Occupant
safety
47Safety Z

Problem
Possible
causes/co nsequences and0050 0050
Solutions The
PASS ENGER AIR
BAG OFFindicator lamp
lights upand remains
lit, even though the
front -passenger seatis
occupied byan adult or
a person ofastature
correspondin gto that of
an adult. The
classification ofthe person onthe front -passenger seatisincor-
rect.
X Make surethecondition sfor acorrect classification ofthe per-
son onthe front -passenger seataremet (Ypage 48).
X Ifthe PASS ENGER AIRBAG OFFindicator lampremains lit,the
front -passenger seatmaynotbeused.
X Have OCScheck edassoon aspossible atan authorized
Mercedes-Ben zCenter. The
PASS ENGER AIR
BAG OFFindicator lamp
does notlight up
and/or doesnotstay
on.
The front -passenger
seat is:
R unoccupied
R occupied bythe
weight ofachild up
to twelve monthsold
in achild restraint
system OCS
ismalfunctionin g.
X Make surethere isnothin gbetween theseat cushion andthe
child seat.
X Make surethattheentire baseofthe child restraint systemrests
on the seat cushion ofthe front -passenger seat.Thebackrest of
the forward-facing childrestraint systemmustlieasflat aspossi-
ble against thebackrest ofthe front passenger seat.Ifnecessary,
adjust theposition ofthe front -passenger seat.
X Make surethattheseat cushion lengthisfully retract ed.
X When installing thechild restraint system,makesurethatthe
seat beltistight. Donot pull theseat belttight using thefront -
passenger seatadjustment .This could result inthe seat beltand
the child restraint systembeingpulled tootightly.
X Check forcorrect installation ofthe child restraint system.
Make surethatthehead restraint doesnotapply aload tothe
child restraint system.Ifnecessary, adjustthehead restraint
accordingly.
X Make surethatnoobject sare apply ingadditional weightontothe
seat.
X Ifthe PASS ENGER AIRBAG OFFindicator lampremains off
and/or thePASS ENGER AIRBAG ONindicator lamplights up,do
not install achild restraint systemonthe front -passenger seat.
X Have OCScheck edassoon aspossible atan authorized
Mercedes-Ben zCenter. Roll
bar G
DANGER
If the rollbar has developed amalfunction, it
may notfunct ion,e.g. inthe event ofan
accident. Therollbars maythen notprotect
the vehicle occupants asinten ded.This
poses anincreased riskofinjury oreven
fatal injury.
Have rollbars check edimmediately ata
quali fiedspecialist workshop. G
WARNING
If you place object sor clothing onthe roll
bar covers, thesecouldimpair rollbar exten -
sion. Therollbars maythen notprotect the
vehicle occupants asinten ded.Inaddition,
object scould endanger thevehicle occu-
pants whentherollbar isexten ding.This
poses anincreased riskofinjury oreven
fatal injury.
Ensure thatthemovement areaofthe roll
bar covers iskept clear. Always stowall
object sin the vehicle correctly. 52
Occ
upantsafetySafety

econ
omical driving. Ahigher levelindicat esa
more economical driving style.Ifthe three
outer areas arecomplet elyfilled atthe same
time, thedriver hasadopted themost eco-
nomic aldriving styleforthe select edsett ings
and prevailing conditions .The ECO display
border lightsup.
The ECO display doesnotindicat ethe actual
fuel consumption .The additionally achieved
range displayed underBonus fr.start Bonus
fr.start does
not indicat eafixed consumption reduction.
In addition todriving style,theactual con-
sumption isaffect edbyother factors, such as:
R load
R tire pressure
R cold start
R choice ofroute
R active electricalconsumers
These factorsare not included inthe ECO dis-
play.
An econ omical driving stylespecially requires
driving atmoderate enginespeeds.
Ach ieving ahigher valueinthe categor ies
"Acc eleration" and"Constan t":
R observe thegearshift recommendat ions.
R drive thevehicle indrive program Cor E.
In urban trafficand stop- start traffic,drive pro-
gram Cis recom mended.
On long journ eysatacon stant speed, e.g.on
the highway, onlytheouter areafor"const ant"
will change.
The ECO display summarizes thedriving style
from thestart ofthe journ eytoits complet ion.
Therefor e,there aremore marked changes in
the outer areas atthe start ofajourn ey.On
longer journeys,there arefewer changes .For
more marked changes ,perform amanual rest
(Y page 194).
Furt herinfor mation onthe ECO display
(Y page 193). Br
aking
Impor tantsafety notes G
WARN
ING
If you shift down onaslippery roadsurface
in an attem pttoincr ease theengine' sbrak-
ing effec t,the drive wheels couldlosetheir grip.
There isan incr eased danger ofskid-
ding andacciden ts.
Do not shift down foradditional enginebrak-
ing onaslippery roadsurface.
Downhill gradients !
On
long, steep gradient s,you must reduce
the load onthe brakes. Touse engine brak-
ing, shift toalower gearingood time. This
helps youtoavoid overheat ingthe brakes
and wearing themoutexces sively.
When making useofthe engine braking
effec t,itis possible thatadrive wheel may
not turn forsome time,e.g.inthe case of
suddenly changingor slippery roadsurface
con ditions .This could cause damage tothe
drive train.This type ofdamage isnot cov-
ered bythe Mercedes- Benzwarrant y.
Change intoalower gearingood timeonlong
and steep downhill gradients.This isespecially
import antifthe vehicle isladen.
This also applies ifyou have activat edcruise
con trol orAct ive Dist ance Assist DISTRONIC.
Heavy andlight loads G
WARN
ING
If you rest your footonthe brake pedal
while driving, thebraking systemcanover-
heat. Thisincreases thestoppin gdistanc e
and caneven cause thebraking systemto
fail. There isarisk ofan acciden t.
Never usethebrake pedalasafootr est.
Never depress thebrake pedalandthe
accelerat orpedal atthe same time.
! Depress
ingthe brake pedalconstant ly
results inexces siveandpremature wearto
the brake pads.
If the brakes havebeen subject edtoaheavy
load, donot stop thevehicle immediately, but
drive onfor ashort while. Thisallows theair-
flow tocool thebrakes morequickly.
Wet roads If
you have driven foralong time inheavy rain
without braking,there maybeadelayed reac-
tion from thebrakes whenbraking forthe first Driving
tips
151Driving andparking Z

New
andrepla cedbrake padsanddiscs only
reach theiroptimum brakingeffectaftersev-
eral hundred kilometers ofdriving. Compen-
sate forthis byappl ying greater forcetothe
brake pedal.Keep thisinmind, andadaptyou r
driving andbraking accordingly duringthis
break-in period.
Excessive heavybraking resultsincorrespond-
ingly highbrake wear.Observe thebrake sys-
tem warning lampinthe instrument cluster
and note anybrake status message sin the
multifu nctiondisplay.Especiall yfor high per-
formance driving,itis important tomaintain
and have thebrake system checked regularly. Drivin
gon wet roads
Hydroplaning If
water hasaccumul atedtoacertain depthon
the road surface, thereisadanger ofhydro-
planing occurring.
For this reason, inthe event ofheavy rainorin
conditions inwhich hydrop laningmayoccur,
you must driveinthe follow ingmanner:
R lowe ryou rspeed
R avoid ruts
R avoid sudde nsteering movements
R brake careful ly
Drivin gon floo ded roads !
Do
not drive through floodedareas.Check
the depth ofany water before driving
through it.Drive slowlythrough standing
water. Otherwise, watercouldenterthe
vehicle interior orengine compartment. It
can then dama gethe engine's orautoma tic
transmission's electroniccomponents. It
can also besucked inby the engine's air
intake connect ionand cause engine dam-
age. Winter
driving G
WARNING
If you shift down onaslipp eryroad surface
in an attempt toincrease theengine's brak-
ing effect, thedrive wheel scould losetheir grip.
There isan increased dangerofskid-
ding andaccidents.
Do not shift down foraddi tional engine brak-
ing onaslipp eryroad surface. G
DANGER
If the exhaust pipeisblocked oradeq uate
ventilation isnot possib le,poisonou sgases
such ascarbon monoxide (CO)mayenter
the vehicle. Thisisthe case, e.g.ifthe vehi-
cle becomes trappedinsnow. Thereisarisk
of fatal injury.
If you leave theengine orthe auxil iaryheat-
ing running, makesuretheexhaust pipeand
area around thevehicle areclear ofsnow.
To ensure anadeq uate suppl yof fresh air,
open awindow onthe side ofthe vehicle
that isnot facing intothewind.
Have yourvehicle winter-proofed ataqua lified
specia listworkshop atthe onset ofwinter.
Drive particul arlycareful lyon slipp eryroad
surfaces. Avoidsuddenaccelera tion,steering
and braking maneuvers. Donot use cruise
control.
If the vehicle threatens toskid orcannot be
stopped whenmoving atlow speed:
X Shift thetransmission toposition 005C.
The outside temperature indicatorisnot
designed toserve asan ice-warning device
and istherefore unsuitable forthat purpos e.
Change sin the outside temperature aredis-
play edafter ashort delay.
Indicated temperatures justabove thefreezing
point donot guarantee thattheroad surface is
free ofice. The road maystillbeicy, especia lly
in woode dareas oron bridge s.The vehicle
could skidifyou failtoada ptyou rdriving
style. Alwaysada ptyou rdriving styleanddrive
at aspeed tosuit theprevai lingweather condi-
tions.
You shoul dpay specia lattention toroad con-
ditions whentemperatures arearound freezing
point.
For more information ondriving withsnow
chains, see(Ypage 295).
For more information ondriving withsummer
tires, see(Ypage 295). Drivin
gtips
153Drivingand parking Z

The
support provided bythe system canbe
impaired if:
R there ispoor visibility, e.g.due toinsuffi-
cient illumination ofthe road, ordue to
snow, rain,fogorheavy spray
R there isglare, e.g.from oncom ingtraff ic,
the sun orreflect ionfrom other vehicles
(e.g. ifthe road surface iswet)
R the windshield isdirty, fogged up,damaged
or covered, forinstan cebyastick er,inthe
vicinit yof the camera
R there arenolane markings ,or several
unclear lanemarkings arepresent ,e.g.
around construction sites
R the lane marking sare worn away,dark or
covered up,e.g. bydirt orsnow
R the distance tothe vehicle infront istoo
short andthus thelane markings cannotbe
detect ed
R the lane markings changequickly, e.g.lanes
branch off,cross oneanother ormerge
R the road isnarrow andwinding
R there arehighly variable shadeconditions
on the roadway
The system isswitched topassive andnolon-
ger assists youbyperformin gsteerin ginter -
vent ions if:
R you actively changelanes
R you switch onthe turn signal
R you take your hands offthe steerin gwheel
or do not steer foraprolonged periodof
time
i Aft
eryou have finished changing lanes,
Act ive Steer ingAssist isautomatically active
once more.
Act ive Steer ingAssist cannotprovide assis-
tanc e:
R on very sharp corners
R when aloss oftire pressure oradefect ive
tire has been detect edand display ed
Observe theimportant safetynoteson Act ive
Distan ceAssist DISTRONIC (Ypage 156).
The steerin ginter ventions arecarried outwith
a limited steeringmoment .The system
requires thedriver tokeep hishands onthe
steerin gwheel andtosteer himself.
If you donot steer yourself orifyou take your
hands offthe steerin gwheel foraprolonged
period oftime, thesystem willfirst alert you
with avisual warning. Asteerin gwheel symbol appears
inthe multifunct iondisplay .If you
have stillnotstart edtosteer andhave not
taken holdofthe steerin gwheel afterfivesec-
onds atthe latest, awarning tonealso sounds
to remind youtotake controlofthe vehicle.
Act ive Steer ingAssist isthen switched topas-
sive. Active Distan ceAssist DISTRONIC
remains active.
Activating ActiveSteering Assist
X Select theActive Distan ceAssist
DIS TRONIC withActive Steer ingAssist func-
tion using theon-board computer
(Y page 198).
The Active Steering AssistOn Active
Steering AssistOnmes-
sage appears inthe multifunct iondisplay .
Act ive Steer ingAssist isactivated.
Informa tioninthe mult ifunction display If
Act ive Steer ingAssist isactivated butnot
ready forasteerin ginter vention,steerin g
wheel symbol 0043appears ingray. Ifthe sys-
tem provides youwith support bymeans of
steerin ginter ventions, symbol 0043isshown in
green.
Deactivating ActiveSteering Assist
X Deact ivatetheActive Distan ceAssist
DIS TRONIC withActive Steer ingAssist func-
tion using theon-board computer
(Y page 198).
The Active Steering AssistOff Active
Steering AssistOffmes-
sage appears inthe multifunct iondisplay .
Act ive Steer ingAssist isdeactivated.
When Active Distan ceAssist DISTRONIC is
deactivated ornot availabl e,Act ive Steer ing
Assist isdeactivated automatically.164
Driving
systemsDriving andparking

Under
thefollowi ngcircumstances, therear
view camera willnotfunction, orwill function
in alimited manner:
R ifthe trunk lidisopen
R in heavy rain,snow orfog
R at night orinvery dark places
R ifthe camera isexposed tovery bright light
R ifthe area islit by fluorescent bulbsor LED
lighting (thedispla ymay flicker)
R ifthere isasudden changeintemperature,
e.g. when driving intoaheated garagein
winter
R ifthe camera lensisdirty orobstructed.
Observe thenotes oncleaning
(Y page 275)
R ifthe rear ofyour vehicle isdamage d.Inthis
case, havethecamera position andsetting
checked ataqual ified speciali stworkshop.
The field ofvision andother functions ofthe
rear view camera mayberestrict eddue to
additional accessories onthe rear ofthe vehi-
cle (e.g. license plateholder, bicycle rack).
On vehicles with<004B0048004C004A004B0057001000440047004D00580056005700440045004F
0048[ chassis,
leaving thestandard heightcanresult ininac-
curacies inthe guide lines,depending ontech-
nical conditions.
i The
cont rast ofthe displa ymay beaffec-
ted bythe sudden presence ofsunlight or
other lightsources, e.g.when exiting a
garage. Payparticular attentioninthis situa-
tion.
i If
usabi lityisseverely restricted,e.g. due
to pixel errors, havethedispla yrepaired or
replaced.
Activating/ deactivating therear view
camera X
To activate: makesurethattheSmartKey
is in position 0048inthe ignition lock.
X Make surethattheActivation byRgear Activation
byRgear
function isselected inthe multimedia sys-
tem; seetheDigital Operator's Manual.
X Engage reverse gear.
The multimedia systemshowsthearea
behind thevehicle withguide lines.
The image fromtherear view camera is
avail able throughout themaneuvering proc-
ess. To
deactivate: therear view camera deacti-
vates ifyou shift thetransmission toposition
005D, orafter driving forwards ashort distance.
The inner segments ofthe warning indicator
are displa yedinred ifthere isacomplete sys-
tem failure.The indicator lampinthe
PARKTRONIC buttonlightsup.
If the system failsatthe rear ofthe vehicle:
R the rear segments areshown inred when
backing up.
R the rear segments arehidden whendriving
forwards.
Displays inthe multim ediasystem The
rear view camera mayshow adistorted
view ofobstacles, showthemincorrect lyor
not atall. The rear view camera doesnotshow
objects inthe followi ngpositions:
R very close tothe rear bumper
R under therear bumper
R in close range above thehandle onthe trunk
lid
! Objects
notatground levelmayappea rto
be further awaythan theyactually are,e.g.:
R the bumper ofaparked vehicle
R the drawba rof atrailer
R the ball coupling ofatrailer towhitch
R the rear section ofan HGV
R aslanted post
Use theguide linesonlyfororientation.
Approach objectsnofurther thanthebot-
tom-most guideline. 0043
Yello wguide lineatadistance ofapprox-
imately 13ft(4.0 m)from therear area
0044 White guidelinewithout steering input–
vehicle widthincluding theexterior mirrors
(static) 180
Driving
systemsDriving andparking