2020 MERCEDES-BENZ SL ROADSTER lane assist

In
aspeed rangefrom0-37 mph
(0 -60 km/h ),Active Steering Assistfocuses
on the vehicle infront, taking intoaccount
lane markings, e.g.when followingvehicle sin
a traffic jam.
At speed sof more than37mph (60km/h),
Active Steering Assistfocuses onclear lane
markings (leftandright), onlyfocusing onthe
vehicle infront ifdetected lanemarkings are
not present atspeed sof up to80 mph
(130 km/h).
If these conditions arenot present, Active
Steering Assistcannot provide assistance.
Active Distance AssistDISTRONIC mustbe
active inorder forthe function tobe avai lable.
Important safetynotes
Active Distance AssistDISTRONIC withActive
Steering Assistcanneither reducetherisk of
an accident ifyou failtoada ptyou rdriving
style, noroverride thelawsof phys ics.Itcan-
not take intoaccount road,weather ortraffic
conditions. ActiveDistance AssistDISTRONIC
with Active Steering Assistisonly anaid.You
are responsib lefor the distance tothe vehicle
in front, forvehicle speed,for braking ingood
time andforstayi nginyou rlane.
Active Distance AssistDISTRONIC withActive
Steering Assistdoesnotdetect roadandtraf-
fic conditions anddoes notdetect allroad
users. Ifyou arefollow ingavehicle whichis
driving towards theedge ofthe road, your
vehicle couldcome intocontact withthecurb
or other roadbounda ries.Beparticul arly
awa reofother roadusers, e.g.cyclists, that
are directly nexttoyou rvehicle .
Obstacles suchasreflector postsinthe lane
or projecting outinto thelane arenot detec-
ted.
An inapp ropria testeering intervention, e.g.
after youhave intentionally drivenoveralane
marking, canbecorrected atany time ifyou
steer slightlyinthe opposi tedirection.
Active Distance AssistDISTRONIC withActive
Steering Assistcannot continuously keepyour
vehicle inlane. Insome cases, thesteering
intervention isnot sufficie ntto bring thevehi-
cle back tothe lane. Insuch cases, youmust
steer thevehicle yourself toensure thatit
does notleavethe lane. The
supp ortprovide dby the system canbe
impa iredif:
R there ispoor visibility, e.g. due toinsuffi-
cient illuminatio nof the road, ordue to
snow, rain,fogorheavy spray
R there isglare ,e.g. from oncoming traffic,
the sun orreflection fromother vehicle s
(e.g. ifthe road surface iswet)
R the windshi eldisdirty, fogged up,dama ged
or covered, forinstance byasticker, inthe
vicinity ofthe camera
R there arenolane markings, orseveral
unclea rlane markings arepresent, e.g.
arou ndconstruction sites
R the lane markings areworn away,dark or
covered up,e.g. bydirt orsnow
R the distance tothe vehicle infront istoo
short andthus thelane markings cannotbe
detected
R the lane markings changequickly, e.g.lanes
branch off,cross oneanother ormerge
R the road isnarrow andwindi ng
R there arehighl yvaria bleshade conditions
on the roadw ay
The system isswitched topassi veand nolon-
ger assi stsyou byperforming steeringinter-
ventions if:
R you actively changelane
R you switch onthe turn signal
R you take yourhands offthe steering wheel
or do not steer foraprolonge dperiod of
time
i Once
youhave finished changing lanes,
Active Steering Assistautoma ticallyreacti-
vates.
Active Steering Assistcannot provide assis-
tance:
R on very sharp corners
R when aloss oftire pressu reor adefective
tire has been detected anddispl ayed
Observe theimportant safetynotesonActive
Distance AssistDISTRONIC (Ypage 158).
The steering interventions arecarried outwith
a limi ted steering moment. Thesystem
requi resthe driver tokeep hishands onthe
steering wheelandtosteer himsel f.
If you donot steer yourself orifyou take your
hands offthe steering wheelforaprolonge d
period oftime, thesystem willfirst alertyou
with avisua lwarning. Asteering wheelsymbo l Drivi
ngsystems
165Drivingand parking Z

Problems
withParking AssistPARKTRONIC Problem
Possible
causes/co nsequences and0050 0050
Solutions Only
thered segments
in the Parking Assist
PARKTRONIC warning
display sare lit.You also
hear awarning tonefor
approximately twosec-
onds.
Parking Assist
PARKTRONIC isdeacti-
vated afterapprox-
imately fiveseconds
and theindicator lamp
in the Parking Assist
PARKTRONIC button
lights up. Parking
AssistPARKTRONIC hasmalfunction edand hasbeen deac-
tivated.
X Ifproblems persist,haveParking AssistPARKTRONIC checkedat
a quali fiedspecialist workshop. Only
thered segments
in the Parking Assist
PARKTRONIC warning
display sare lit.Parking
Assist PARKTRONIC is
deactivated after
approximately fivesec-
onds. The
Parking AssistPARKTRONIC sensorsaredirty orthere isinter-
ferenc e.
X Clean theParking AssistPARKTRONIC sensors(Ypage 278).
X Switch theignition backon. The
problem maybecaused byan extern alsource ofradio orultra-
sound waves.
X Check tosee ifParking AssistPARKTRONIC worksatadifferent
location. Active
Parking Assist
General notes Act
ive Parking Assistisan electron icparking
aid with ultrasound. Itmeasures theroad on
both sides ofthe vehicle. Aparking symbol
indicates asuitable parkingspace.Active
steering intervention canassist youduring
parking andwhen exiting aparking space.You
can also stilluse Parking AssistPARKTRONIC
(Y page 174).
Import antsafety notes Act
ive Parking Assistismerely anaid. Itis not
a replacement foryour atten tiontoyour imme-
diate surroundings. Youarealwa ysresponsi-
ble forsafe maneuvering, parkingandexiting a
parking space.Makesurethatnopersons, ani-
mals orobject sare inthe path ofyour vehicle.
When Parking AssistPARKTRONIC isdeactiva-
ted, Active Parking Assistisalso unavaila ble. G
WARNING
While parking orpulli ngout ofaparking
space, thevehicle swingsoutand candrive
onto areas ofthe oncomin glane. Thiscould
cause youtocollide withother roadusers or
object s.There isarisk ofan accident.
Pay atten tiontoother roadusers orobject s.
Stop thevehicle ifnecessary orcancel the
Act ive Parking Assistparking procedure. G
WARNING
While parking orpulli ngout ofaparking
space, thevehicle swingsoutand candrive
onto areas ofthe oncomin glane. Thiscould
cause youtocollide withother roadusers or
object s.There isarisk ofan accident.
Pay atten tiontoother roadusers orobject s.
Stop thevehicle ifnecessary orcancel the Driving
systems
177Drivingandparking
Z

0087
Yellow guidelineforthe vehic lewidth
inc luding theexterior mirrors, atthe cur-
ren tste erin gwheel angle(dynamic )
0085 Yellow lanemark ingthe cours ethe tires
will takeat the curr entsteerin gwheel
angle (dynamic ) 0083
Yellow guidelineatadistan ceofapprox -
imate ly3ft (1. 0m) from therear area
0084 Vehic lecen teraxle (mark erassist ance)
006B Bumper
006C Red guide lineatadistan ceofapprox -
imate ly12 in(0. 30 m)from therear area
The guide linesareshown whenthetransm is-
sion isin posit ion005E.
The distan cespecif ications onlyapply to
obje ctsthat areatgroun dlevel. 0043
Frontwarnin gdisplay
0044 Addit ional measurem entoperat ionalreadi-
ness indicatorforthe Park ingPack age
with rearview camer a
0087 Rear warnin gdisplay
Vehicles withthePar king Packa gewith
rea rview camer a:when thePark ingPack age
with rearview camer ais operat ional
(Y page 174), addition almeasurem entopera-
tion alreadin essindic ator0044appears inthe
multim ediasyste m.Ifthe Park ingPack age with
rearwarnin gdisplays areactive orlight
up, warnin gdisplays 0043and 0087are also active
or light upcor respon dinglyinthe multim edia
syste m.
"Rever separking" funct ion Ba
cking upstraight intoapa rking space
withou tsteer inginpu t 0043
Whit eguide linewithout steerin ginput –
vehic lewidth including theexterior mirrors
(stat ic)
0044 Yellow guidelineforthe vehic lewidth
inc luding theexterior mirrors, atthe cur-
ren tste erin gwheel angle(dynamic )
0087 Yellow guidelineatadistan ceofapprox -
imate ly3ft (1. 0m) from therear area
0085 Red guide lineatadistan ceofapprox -
imate ly12 in(0. 30 m)from therear area
X Make surethattherear view camer ais act i-
vate d(Y page 182).
The lane andtheguide linesareshown .
X With thehelp ofwhite guide line0043,chec k
wheth erthe vehic lewill fitintothe park ing
space.
X Usin gwhite guide line0043asaguide, care-
fully back upunt ilyou reach theend posi-
tion .
Red guide line0085isthe nat the end ofthe
park ingspace. Thevehic leisalmost parallel
in the park ingspace. Driving
systems
183Driving andparking Z

180°
view 0043
Symbol forthe 180 °view function
0044 Your vehicle
0087 Warnin gdisplays forthe Parkin gPackage
with rearview camera
You canalso usetherear view camera to
select a180 °view.
When theParkin gPackage withrearview cam-
era isoperation al(Y page 174), asymbol for
your ownvehicle appears inthe multimedia
system. Ifthe Parkin gPackage withrearview
camera warning displays areactiv e,warning
displays 0087light upinthe multimedia system
in yellow orred accor dingly. ATTEN
TIONASSIST
General notes ATTE
NTION ASSIS Thelps youduring long,
mono tonous journ eys,such ason highways. It
is activ ein the 37mph (60km/ h)to 125 mph
(200 km/h)range. IfATTENTION ASSIST
detects typicalindica torsoffatigu eor increas-
ing lapses inconcentration onthe part ofthe
driver, itsugg ests youtake abrea k.
Important safetynotes ATTENTION
ASSISTisonly anaid tothe driver.
It might notalwaysrecognize fatigueor
increasi nginattentiveness intime orfail to
recognize thematall.The system isnot asub-
stitute forawel l-rested andattentive driver. The
functional ityofATTENTION ASSISTis
restricted andwarni ngsmay bedela yedornot
occur atall:
R ifthe length ofthe journey isless than
app roximatel y30 minutes
R ifthe road condition ispoor, e.g.ifthe sur-
face isuneven orifthere arepothol es
R ifthere isastrong sidewind
R ifyou have adopted asporty drivingstyle
with high cornering speedsorhigh rates of
accele ration
R ifyou arepredo minantly drivingslow erthan
37 mph (60km/h) orfaster than125mph
(200 km/h )
R ifyou aredrivi ngwith theSteering Assistof
Active Distance AssistDISTRONIC activated
R ifthe time hasbeen setincorrectly
R in active drivingsitua tions, suchaswhen
you change lanesorchange yourspee d
The attention levelevaluation isdele tedand
restarts whenthejourney iscontinued, if:
R you switch offthe engine
R you take offyou rseat beltandopen the
driver' sdoor, e.g.forachange ofdrivers or
to take abrea k
Di splayin gthe attention level You
canhave current statusinformatio ndis-
pla yed inthe assi stance menu(Ypag e199)
of the on-board computer.
X Select theAssistance displayforATTEN-
TION ASSIST using the on-board computer
(Y pag e200) . Drivi
ngsystems
185Drivingand parking Z

G
WARNING
Active BlindSpotAssist doesnotreact to:
R vehicl esovertaken tooclosel yon the side ,
pla cing them inthe blind spot area
R vehicl eswhi chapp roach withalarg e
spee ddiffer ential andovertake yourvehi-
cle
As aresu lt,Active BlindSpotAssist maynei-
ther givewarnings norintervene insuch sit-
ua tions. There isarisk ofan accide nt.
Alwa ysobse rvethe traffic conditions care-
full y,and maintai nasafe latera ldista nce.
i USA
only:This devicehas been approved
by the FCC asa"Veh icularRadar System" .
The rada rsensor isintended foruse inan
au tomotive radarsystem only.Remo val,
tamperi ng,oralteri ngofthe devi cewillvoid
any warranties, andisnot permi ttedbythe
FCC. Donot tamper with,alter, oruse inany
non-approve dway .
Any unau thorized modification tothis device
coul dvoid theuser 'sau thority toopera te
the equipme nt.
i Ca
nada only:This devicecompli eswith
RSS-210 ofIndustry Canada .Opera tionis
sub ject tothe followi ngtwo conditions:
1. This devicemay notcaus einterference,
and
2. This devicemust accept anyinterference
receive d,includ inginterference thatmay
caus eundes iredopera tionofthe devi ce.
Remo val,tamperi ng,oralteri ngofthe
devi cewillvoid anywarranties, andisnot
permi tted.Donot tamper with,alter, oruse
in any non-approve dway .
Any unau thorized modification tothis device
coul dvoid theuser 'sau thority toopera te
the equipme nt.
Radar sensors
The rada rsensors forActive BlindSpotAssist
are integrated inthe rear bump erand inthe
radi ator trim. Make surethatthebump ersand
radi ator trim arefree from dirt,iceand slush.
The rear sensors mustnotbecovered ,for
exampl eby cycle racks oroverha ngingcargo.
Follo wing asevere impactor inthe event of
dama getothe bump ers,have thefunction of
the rada rsensors checked ataqua lified spe- cial
istworksho p.Active BlindSpotAssist may
otherwi seno longer workprope rly.
Moni toring area G
WARNING
Active BlindSpotAssist doesnotdetect all
traffic situations androad users.There isa
risk ofan accide nt.
Alwa ysmake surethatthere issuffi cient
dista nceonthe side forother traffic or
obstacl es. Active
BlindSpotAssist monitors thearea up
to 10 ft(3.0 m)behi ndyou rvehicl eand
dire ctly next toyou rvehicl e,as show nin the
dia gram.
The detection ofobstacl escan beimpa iredin
the case of:
R there isdirt onthe sensors oranythi ngelse
covering thesensors
R poor visibility, e.g. due torain, snow or
spra y
Vehi cles inthe monitoring rangearethen not
indica ted.
Active BlindSpotAssist maynotdetect narrow
vehicl es,such asmotorcycle sor bicy cles, or
may onlydetect themtoolate.
If the lanes arenarrow ,vehicl esdrivi nginthe
lane beyond thelane next toyou rvehicl emay
be indica ted,espe ciallyifthe vehicl esare not
drivi nginthe midd leof their lane. Thismay be
the case ifthere arevehicl esdrivi ngatthe
inner edgeoftheir lanes . Drivi
ngsystems
187Drivingand parking Z

Eith
erno bra king applica tion,or acou rse-cor-
recti ngbra keapplica tionad apted tothe driv-
ing situa tionoccu rsif:
R the reareveh icles orobsta cles,e.g .cra sh
ba rriers ,lo cate don both side sof your veh i-
cle .
R aveh icleap pro ach esyoutoo closelyat the
si de .
R youha ve adop ted asp orty drivin gsty lewith
hi gh corne ringsp ee ds.
R youcle arly bra keoracc elera te.
R adri vin gsa fety system intervenes ,e.g .
ESP ®
or PR E-SAFE ®
Bra ke.
R ESP ®
is sw itch edoff.
R aloss oftire pressu reor ade fecti vetire is
de tecte d.
Sw itchin gon Activ eBli nd Spo tAs sist X
Ma kesure tha tActiv eBli nd Spo tAssi stis
acti vated (Ypage 201 ).
X Tu rn the Sma rtKeyto positio n0048 inthe igni-
tio nlock.
Wa rning lamps 0043inthe exte riormir rors
li ght upred forappro xim ately1.5 second s
and thentur nye llow . Ac
tiv eLan eKe epi ng Assist Ge
neral notes Activ
eLa ne Kee ping Assi stmoni torsthearea
in fro ntofyour veh icleby mea nsofmu ltifu nc-
tio ncam era0043atthe top ofthe winds hield.
Va rio us area sto the front, rearand side of
yo ur veh iclear ealso moni toredwi th the aid of
the rada rsen sor system .Activ eLa ne Kee ping
Assi stdetects lane ma rkin gson the roadand
can warnyoube for eyo uleav eyo ur lane unin-
tenti onally. Ifyo udo not reactto the warning,
a lane-co rrecting applica tionof the brakes can
bri ng the vehicleba ck into theoriginal lane.
Thi sfu nctio nis availa bl e in asp ee dra nge
be twe en40 mph and120 mph (60km/h and
200 km/h ).
For Activ eLa ne Kee ping Assi stto assist you
wh en drivin g,the rada rsen sor system mustbe
op era tional .
Impo rtant safety notes
If yo ufa ilto adaptyo ur drivin gsty le,Activ e
La ne Kee ping Assi stcan neithe rred uce the
ris kof acc ident nor override the laws ofphys-
ics .Activ eLa ne Kee ping Assi stcanno ttake
into account roa d,we ath eror tra fficcond i-
tio ns. Activ eLa ne Kee ping Assi stisonl yan
ai d. Yo uar eres ponsi ble for the dista nce tothe
veh iclein fro nt, for veh iclesp ee d, for braking
in go od time andforstaying inyour lane.
Activ eLa ne Kee ping Assi stcanno tconti nu-
ou sly kee pyo ur veh iclein its lane. G
WA
RNING
Activ eLa ne Kee ping Assi stcanno tal wa ys
cle arly de tect lane ma rkin gs. Dr
ivi ng system s
189Drivi ng andparki ng
Z

In
such cases, ActiveLaneKeepi ngAssist
can:
R give anunnecessary warningandthen
make a<00460052005800550056004800100046005200550055004800460057004C0051
004A[ brakeapplica-
tion
R neither giveawarning norintervene
There isarisk ofan accident.
Alway spay particul arattention tothe traffic
situa tionandkeep within thelane, espe-
ciall yif Active LaneKeepi ngAssist alerts
you .Terminate theintervention inanon-crit-
ical driving situation.
The system maybeimpa iredormay notfunc-
tion if:
R there ispoor visibility,e.g. due toinsuffi-
cient illuminatio nof the road, ordue to
snow, rain,fogorheavy spray
R there isglare ,e.g. from oncoming traffic,
the sun orreflection fromother vehicle s
(e.g. ifthe road surface iswet)
R the windshi eldisdirty, fogged up,dama ged
or covered, forinstance byasticker, inthe
vicinity ofthe camera
R there arenolane markings, orseveral
unclea rlane markings arepresent, e.g.
arou ndconstruction sites
R the lane markings areworn away,dark or
covered up,e.g. bydirt orsnow
R the distance tothe vehicle infront istoo
short andthus thelane markings cannotbe
detected
R the lane markings changequickly, e.g.lanes
branch off,cross oneanother ormerge
R the road isnarrow andwindi ng
R there arehighl yvaria bleshade conditions
on the roadw ay
R no vehicle isdetected inthe adjacent lane
and there arebroken lanemarkings
Warning vibration inthe steering wheel
A warning maybegiven ifafront wheel passes
over alane marking. Youwillthen bewarned
by means ofavibratio nthrough thesteering
wheel lasting forupto1.5 seconds .
In order thatyouarewarned onlywhen neces-
sary andingood timeifyou cross thelane
marking, thesystem detects certaincondi-
tions andwarns youaccordingly . The
warning vibrationoccurs earlierif:
R you appro achtheouter lanemarking ona
bend
R the road hasvery widelanes, e.g.afreewa y
R the system detects solidlanemarkings
The warning vibrationoccurs laterif:
R the road hasnarrow lanes
R you cutthe corner onabend
Lane-c orrecting brakeapplication G
WARNING
A lane-correcting brakeapplication cannot
alw ays bring thevehicle backintotheorigi-
nal lane. There isarisk ofan accident.
Alway ssteer, brakeoraccelera teyou rself,
especia llyifActive LaneKeepi ngAssist
warns youormakes alane-correcting brake
appl ication. G
WARNING
Active LaneKeepi ngAssist onlydetects traf-
fic conditions orroad users toalimi ted
extent. Invery rarecases, thesystem may
make aninapp ropria tebrake application,
e.g. after intentionally drivingoverasolid
lane marking. Thereisarisk ofan accident.
An inapp ropria tebrake application maybe
interrupted atany time ifyou steer slightly
in the opposi tedirection. Alwaysmake sure
that there issufficie ntdistance onthe side
for other traffic orobstacle s.
In rare cases, ActiveLaneKeepi ngAssist
could detect broken linemarkings orspecia l
structures onthe road surface assolid lane
markings. Aninapp ropria tebrake application
can beinterrupted atany time, forexample if
you steer slightlyinthe opposi tedirection. 190
Drivi
ngsystemsDrivi ngand parking

If
you leaveyou rlane, under certain circum-
stances thevehicle willbrake brieflyon one
side. Thisismeant toassis tyou inbringing the
vehicle backtothe origina llane.
If alane-correcting brakeapplication occurs,
displ ay0043 appe arsinthe multifu nctiondis-
pla y.
A lane-correcting brakeapplication canbe
made afterdriving overalane marking recog-
nized asbeing solidorbroken. Beforethis,a
warning musthavebeen issuedbymeans ofa
vibratio nthrough thesteering wheel.In addi -
tion, alane with lanemarkings onboth sides
must havebeen detected.
In the case ofabroken lanemarking being
detected, alane-correcting brakeapplication
can only bemade ifavehicle hasbeen detec-
ted inthe adjacent lane.Thefollow ingvehicle s
can have aninflue nceonbrake application:
oncoming traffic,vehiclesthat areovertaking
and vehicle sthat aredriving paralleltoyou r
vehicle .
i A
further lane-correcting brakeapplication
can only occur afteryourvehicle has
returned tothe origina llane.
No lane-correcting brakeapplication occursif:
R you clearl yand actively steer,brakeor
accelera te
R you cutthe corner onasharp bend
R you have switched onthe turn signal
R adriving safetysystem intervenes, e.g.
ESP ®
,PRE-SAFE ®
Brake orActive BlindSpot
Assist
R you have adoptedasporty driving stylewith
high cornering speedsor high rates ofaccel-
eration
R ESP ®
is switched off
R the transmission isnot inpositio n005B R
an obstacle hasbeen detected inthe lane in
which youaredriving
R when aloss oftire pressu reor adefective
tire has been detected anddispl ayed
There isapossib ility that theActive Lane
Keepi ngAssist couldmisjudge thegiven traffic
situa tion. Aninapp ropria tebrake application
may beinterrupted atany time ifyou :
R steer slightlyinthe opposi tedirection
R switch onthe turn signal
R clearl ybrake oraccelera te
A lane-correcting brakeapplication isinterrup-
ted automa ticallyif:
R adriving safetysystem intervenes, e.g.
ESP ®
,PRE-SAFE ®
Brake orActive BlindSpot
Assist
R lane markings arenolonger detected
Swi tching onActiv eLane Keeping Assist
X Switch onActive LaneKeepi ngAssist using
the on-board computer; todo so, select
Standard Standard
orAdaptive Adaptive
(Ypage 201).
If you drive atspeed sabove 40mph
(60 km/h )and lane markings aredetected,
the lines inthe assis tance graphi cdispl ay
are shown ingreen (Ypage 200). Active
Lane Keepi ngAssist isready foruse.
When Standard Standard
isselected,
No warning vibrationoccurs if:
R you switch onthe turn signal s.In this
event, thewarnings aresupp ressed fora
certain periodoftime.
R adriving safetysystem intervenes, such
as ABS, BASorESP ®
.
When Adaptive Adaptive
isselected,
No warning vibrationoccurs if:
R you switch onthe turn signal s.In this
event, thewarnings aresupp ressed fora
certain periodoftime.
R adriving safetysystem intervenes, e.g.
ABS, BASorESP ®
.
R you accelera tehard, e.g.kickdown.
R you brake hard.
R you steer actively ,e.g. swerve toavoid an
obstacle orchange lanesquickly.
R you cutthe corner onasharp bend. Drivi
ngsystems
191Drivingand parking Z