light MERCEDES-BENZ GLS 2020 Repair Manual

Ov
ervie wof driving systems anddriving
saf etysy stems In
this sect ion, youwill find informa tionab ou t
th efo llo wing drivin gsy stems anddriving safety
sy stems:
R 360° Camer a(/ page27 8)
R ABS (Anti-lo ckBra king System)
(/ page21 9)
R ActiveDis tance AssistDIS TRONI C
(/ page 235)
R AIRMA TIC(/ page250)
R ActiveBr ak eAssi st(/ pag e225)
R ActiveLa ne Keeping Assist(/ page29 4)
R Start-of fassis t
R ATTENTION ASSIST(/ page28 7)
R BAS(B rake Assis tSys tem) (/ page220)
R Hill StartAs sis t(/ page24 8)
R DSR (Dow nhillSpe edRegulatio n)
(/ page 233)
R E-AC TIVE BODY CONTR OL(/ page258) R
EBD (Electr onicBrakeforc eDis tribution)
(/ page225)
R ESP®
(Elect ronic Stability Program)
(/ page22 0)
R Off-ro ad ESP®
(/ page22 3)
R ESP®
Cr oss wind Assis t(/ page22 4)
R ESP®
trailer stabiliz ation(/ page22 4)
R ActiveSpe edLimi tAssi st(/ pag e239)
R HOLD function (/page24 9)
R STEER CONTR OL(/ page 225)
R ActiveSt eer ing Assis twit hre scue lanefunc‐
tion (/page24 2)
R ActiveEmerg encyStop Assis t(/ page24 5)
R ActivePa rking Assist(/ page28 1)
R Parking AssistPA RK TRONI C(/ page26 9)
R Rear vie wcam era(/ page27 4)
R ActiveLa ne Chang eAssi st(/ pag e24 4)
R ActiveTr af fic Ja m Assi st(/ pag e24 6)
R Cruis econtr ol(/ page 231) R
Blind SpotAssis tand ActiveBli nd Spo tAssi st
wit hex itwa rning (/ page29 1)
R Traf fic Sign Assist(/ pag e289 ) Fu
nction ofABS The
Anti-loc kBr ak eSy stem (ABS )re gulat esthe
br ak epr essur ein critical driving situation s:
R Dur ing braking, e.g.atfull brak eapplication
or insuf ficie nttiretracti on, thewheels are
pr eve nted from lock ing.
R Vehicle steer ability whilebraking isensur ed.
If ABS interve nes when braki ng, youwill feel a
pulsing inthebr ak epedal. Thepulsating brak e
pedal canbeanindicat ionofhazar dous road
con dition sand canserveas are minder totak e
ex tra car ewh ile dr ivi ng.
Sy stem limit s
R ABSis act ive from speeds ofappr ox.5 mp h
(8 km/ h).
R ABSma ybe impair edorma yno tfunc tion ifa
malfunc tionhasoccurredand theye l‐
lo w 0025 ABSwa rning lam plight sup con tin‐ Dr
ivin gand parking 21
9

ESP
®
can moni torand improve driving stabilit y
and tract ion inthefo llo wing situat ions,wit hin
ph ysical limit s:
R When pulling away on wetor slip pe ry road‐
wa ys.
R When braking.
R Vehicl eswith traile rhitc h:intrail er oper a‐
tion from spee dsof40 mph(65 km/h), ifth e
ve hicle/tr ailercombination beginstosw ay
fr om side toside.
R Instro ng side winds when youar edr ivin g
fa ster than 47 mp h(7 5 km/h).
If th eve hicle deviat esfrom thedir ect ion desir ed
by thedr iver ,ES P®
can stabiliz eth eve hicle by
int erve ning inthefo llo wing ways:
R One ormor ewheels arebr ak ed.
R The engine outputisadap tedaccor dingto
th esituation .
ES P®
is deactiv ated ifth e00BB ESP®
OFF warn‐
ing lam plight sup con tinuousl yin theins trument
clus ter:
R Driving stabilit ywill nolongerbe improve d. R
Vehicl eswith traile rhitc h:stabiliz ationof
th eve hicle/tr ailercombination isno long er
activ e.
R Crosswind Assistis no long eractiv e.
R The drive wheels couldspin.
R ETS/4E TStracti oncontr olisstill act ive.
% When ESP®
is deact ivat ed, youar est ill assis‐
te dby ESP ®
wh en braki ng.
If th e00E5 ESP®
wa rning lam pflashes inthe
ins trumen tclus ter,one orseveralve hicle wheels
has reac hed itsgrip limit :
R Adaptyo ur drivin gst yle to suit thecur rent
ro ad and weather condition s.
R Donotdeac tivateES P®
.
R Onlydepr esstheaccelera torpeda las faras
is necessar ywhen pulling away.
It can beadv antageous todeactiv ateES P®
in the
fo llo wing situat ionstoimprove tracti on:
R Whenusing snowch ains .
R Indeep snow .
R Onsand orgrave l. %
Spin ningth ewheels results inacutting
action, whichenhances traction.
If th e00E5 ESP®
wa rning lam plight sup con tinu‐
ousl y,ESP ®
is no tav ailable duetoamalf unction.
Obse rveth efo llo wing informatio n:
R Warning and indic ator lam ps(/ page62 1)
R Disp lay mess ages (/ page56 7)
ET S/4ET S(Electr onicTractio nSy stem)
ET S/ 4ETS tracti oncontr olispa rtof ESP ®
and
mak esitpossible topull away and accelerat eon
a slippe ryroadw ay.
If yo usele cttheF orG drive pr og ram, a
specia lET Ssy stem specif icallysuit edtooff-r oad
te rrain isaut omat icallyact ivat ed.
ET S/ 4ETS can improve theve hicle's traction by
int erve ning inthefo llo wing ways:
R The drive wheels arebr ak ed individually if
th ey spin.
R Mor edr ive to rq ue istrans ferred tothewheel
or wheels withtraction . Dr
iving andparking 22
1

Ac
tiv atin g/deac tivatin gES P®
(E lectr onicSta‐
bil ity Prog ram) (veh icle swi thout Off-road
pac kage) Multimedia
system:
4 © 5
Set ting s5
Quick Access
% ESP®
can onlybe activ ated/deact ivat ed
using quick acc ess when atleas tone other
funct ionisavailable inqu ick acc ess. ESP®
can other wise befound intheAssist ance
menu.
Mer cedes‑AMG vehicl es:obse rveth eno tesin
th eSupplement .Ot her wise, youma yfa ilto rec‐
ogni zedangers. #
Sele ctESP .
A pr om ptappear s. #
Select Onor00BB Off.
ES P®
is deac tivated ifth e00BB ESP®
OFF warn‐
ing lam plight sup con tinuousl yin theins trument
clus ter.
Obser vetheinf ormation onwarning lam psand
displa ymess ages whic hma ybe sho wninthe
ins trumen tclus ter. Ac
tiv atin g/deac tivatin gES P®
(E lectr onicSta‐
bil ity Prog ram) (veh icle swi th Off-road pack‐
ag eor E-Ac tiv eBody Contr ol) #
Pullro ck er switc h1.
ES P®
is deactiv ated ifth e00BB ESP®
OFF warn‐
ing lam plight sup con tinuousl yin theins trument
clus ter. Obser
vetheinf ormation onwarning lam psand
displa ymess ages whic hma ybe sho wninthe
ins trumen tclus ter. Fu
nction ofESP ®
Cr osswind Assist ES
P®
Cr osswind Assistde tects sudde ngu stsof
side wind andhelps thedr iver tokeep theve hi‐
cle inthelane:
R ESP®
Cr osswind Assistis activ eat vehicle
speeds between appr ox.47 mp h(7 5 km/h)
and 125mp h(2 00 km/h) whendr iving
st ra ight ahead orcor ner ing slight ly.
R The vehicle isstabiliz edbymeans ofindivi d‐
ua lbr ak eapp lication onone side. Fu
nction ofESP ®
trailer stabil izatio n &
WARNIN GRisk ofacci dent inpoo rro ad
and weather condition s
In poor road and weather condition s,the
tr ai le rst abiliz ationcan notpr eve ntlurc hing of
th eve hicle/tr ailercombination. Trailer swit h 22
4
Drivin gand parking

a
high centerof grav ity ma ytip over bef ore
ES P®
de tects this. #
Alw aysadap tyo ur drivin gst yle to suit
th ecur rent road and weather condi‐
tio ns. When
drivin gwit hatrailer ,ES P®
can stabiliz e
yo ur vehicle ifth etrailer begins tosw erve from
side toside:
R ESP ®
traile rst abiliz ationis act ive abo ve
speeds of40 mph(65 km/h).
R Slight swerving isreduced bymeans ofata r‐
ge ted, individual brak eapplication onone
side.
R Intheeve ntofsevere sw erving, theengine
output isalso reduced andallwheels are
br ak ed.
ES P®
tra iler stabiliz ationma ybe impair edor
ma yno tfun ction if:
R The trailer isno tcon nectedcor rectl yor is
no tde tected prope rly by theve hicle. Fu
nction ofEBD (electr onicbrak efo rc edis‐
tr ibut ion) EB
Dis ch aract erize dby thefo llo wing:
R Mon itor ing and regulating thebr ak epr essur e
on there ar wheels .
R Improve ddr iving stabilit ywhen brakin g,
espe ciallyon ben ds. Fu
nction ofSTEER CONT ROL ST
EER CONTR OLhelpsyo uby trans mitting a
no tice ablesteer ing forc eto thesteer ing wheel in
th edir ect ion requ ired forve hicle stabiliz ation.
This steer ing recomme ndation isgiv en particu‐
lar lyin thefo llo wing situat ions:
R Both right wheels orboth leftwheels areon
a we tor slip pe ry road sur face whe nyo u
br ak e
R The vehicle star ts to skid Sy
stem limit s
ST EER CONTR OLmaybe impa ired orma yno t
fu nctio nin thefo llo wing situat ions:
R ESP®
is deact ivat ed.
R ESP®
is malfun ctionin g.
R The steer ing ismalfunct ioning.
If ES P®
is malfunct ioning,youwill beassis ted
fur ther by theelectr icpo we rst eer ing. Fu
nction ofActiv eBr ak eAs sist Ac
tiveBr ak eAssi stconsi stsof thefo llo wing
func tions:
R Distance warning func tion
R Autonomo usbraki ng func tion
R Situ ation-d epend ent braki ng assist anc e
R Vehicl eswith Drivin gAss istanc ePa ck‐
ag e:Evasi ve Steer ing Assis tand corner ing
func tion
Ac tiveBr ak eAssi stcan helpyo uto minimize the
ri sk ofacollision withve hicles, cyclis tsor Dr
iving andparking 225

pedes
trians, orreduce theef fects ofsuch acol li‐
sion .
If Ac tiveBr ak eAssi sthas detected arisk ofcolli‐
sion, awa rning tone sou nds and theL dis‐
ta nce warning lam plight sup intheins trument
clus ter.
Ve hicl eswith PRE-S AFE®
:depe nding onthe
cou ntry,an addit ionalhap ticwarning occursin
th efo rm ofslight, repeat edtensi oni ng ofthe
seat belt.
If yo udo notre act tothewa rning, autono mous
br akin gcan beinit iated incritic alsituat ions.
In espec iallycr itic alsituat ions,Ac tiveBr ak e
Assi stcan initia te aut onomo usbrakin gdir ect ly.
In this case, thewa rning lam pand warning tone
occu rsi mu ltane ously with thebr aking applica‐
tion .
If yo uappl yth ebr ak eyo urself inacr itical situa‐
tio nor appl yth ebr ak edur ing autonomous brak‐
ing, situation -dependen tbr aking assistance
occu rs.The brak epr ess ureincr eases uptomax‐
imum full-sto pbr aking ifnec essar y. If
aut onomous braking orsitua tion-dependent
br aking assistanc ehas occurred, displa y1
appear sin themultifunc tiondispla yand then
aut omaticall ygoes outafte ra shor ttime.
If th eaut onomous braking function orthesitua‐
tion -dependen tbr aking assistance istrig ge red,
additional preve ntiv emea suresfo roccupa nt
pr otect ion (PRE-S AFE®
)ma yalso beinitiat ed. &
WARNIN GRisk ofan acci dent caused by
limit eddetection perform anc eof Active
Br ak eAssi st
Ac tiveBr ak eAssi stcanno tal wa ys cle arly
ident ifyobje ctsand complextraf fic situ a‐
tions .
In such case s,Ac tiveBr ak eAssi stmight :
R Giveawa rning orbrak ewit hout reason
R Notgiv eawa rning ornotbr ak e #
Alw ayspa ycar eful attention tothetra f‐
fi c situ ation; donotre ly on ActiveBr ak e
Assi stalon e.Ac tiveBr ak eAssi stisonl y
an aid. Thedriver isresponsible for
maint ainingasui table distance tothe
ve hicle infront, vehicle speed andfor
br aking ingood time. #
Beprepar edtobrak eor sw erve ifnec ‐
essar y. %
Ifth esy stem isuna vailable, the00D4 displa y
appear sin themultifunc tiondispla y.
Als oob ser vethesy stem limits ofActiveBr ak e
Assi st. 226
Driving andparking

The
indiv idua lsub func tions areav ailab lein
th efo llo wing speed rang es:
The distance warning func tion issues awa rning
in thefo llo wing situat ions:
R From appr oximat ely4 mp h(7 km/h), ifyo ur
ve hicle iscritically closetoave hicle or pedes
trian, youwill hear anintermit tent
wa rning tone and theL distance warning
lam plight sup intheins trument cluster.
Ve hicl eswith PRE-S AFE®
:depe nding on
th ecount ry,an addition alhap ticwarning occ
ursin thefo rm ofslight, repeat edten‐
si oni ng oftheseat belt.
Br ak eimmediat elyortake evasiv eact ion,pr ov i‐
ded itis saf eto do soand thetra ffic situat ion
allo wsthis.
Th edis tance warning funct ioncan aidyouin thefo llo wing situations withan intermit tent wa rning tone and awa rning lam p: Ve
hicl es
tr av eling in
fr ont St
ation ary
ve hicl es Cr
oss ing
ve hicl es Mo
ving
pedes trians St
ation ary
pedes trians Cr
oss ing
cy cli sts Cy
clis tstrave l‐
ing infront St
ation ary
cy cli sts
Ve hicles
wit hout Driv‐
ing Assis‐
ta nce Pack‐
ag e Up
toappr ox.
15 5mp h
(250 km/h) Up
toappr ox.
50 mph
(80 km/ h) No
react ion Uptoappr ox.
50 mph
(80 km/ h) No
react ion Uptoappr ox.
37 mph
(60 km/ h) Up
toappr ox.
50 mph
(80 km/ h) No
react ion
Ve hicles with
Dr iving Assis‐
ta nce Pack‐
ag e Up
toappr ox.
15 5mp h
(250 km/h) Up
toappr ox.
62 mph
(1 00 km/ h) Up
toappr ox.
43 mph
(70 km/ h) Up
toappr ox.
50 mph
(80 km/ h) Up
toappr ox.
43 mph
(70 km/ h) Up
toappr ox.
43 mph
(70 km/ h) Up
toappr ox.
50 mph
(80 km/ h) Up
toappr ox.
43 mph
(70 km/ h) Dr
iving andparking22
7

R
Activati on byan abr uptst eer ing movement
dur ing asw erving maneu ver.
R Assi stanc edur ing swervin gand stra ight enin g
of theve hicle.
R React ion from aspee dof appr oximat ely
12 mp h(20 km/h) uptoaspee dof appr ox‐
imat ely43 mph(70 km/h).
Yo ucan preve nttheassis tance atanytime by
act ivel yst eer ing.
Cor nering function (onlyve hicl eswith Driv‐
ing Assistanc ePa ckag e)
If adang erofcoll ision from anoncoming vehicle
is de tected whe ntur ning across anoncomi ng
la ne, autonomo usbraki ng can beinitia tedat
speeds below9mp h(1 5 km/h) beforeyo uha ve
lef tth elane inwhic hyo uar edr ivin g. &
WARNIN GRisk ofan acci dent despite
Ev asive St eer ing Assis t
Ev asiv eSt eer ing Assis tcann otalw aysclear ly
ident ifyobje ctsand complextraf fic situ a‐
tions . In
addition, thesteer ing suppor tof Evasiv e
St eer ing Assis tis ge ner ally no tsu fficien tto
av oid acollision.
In suc hcases Evasiv eSt eer ing Assis tcan:
R givean unnec essarywa rning orprov ide
assis tance
R notgi ve awa rning ornotpr ov ide assis‐
ta nce #
Alw ayspa ycar eful attention tothetra f‐
fi c situ ation; donotre ly on Evasiv e
St eer ing Assis talone. #
Beready tobrak eand take evasiv e
act ion ifnec essar y. #
Preve nttheassis tance byact ivel y
st eer ing innon -critical driving situa‐
tion s. #
Drive at an appr opriatespeed ifpedes‐
tr ians areclose tothepat hof your vehi‐
cle. Sy
stem limit s
Fu llsy stem perform anc eis no tav ailable fora
fe w sec ond saf te rswi tching ontheignition or
af te rdr iving off.
The system maybe impair edorma yno tfunc tion
in thefo llo wing situat ions:
R Insno w,rain, fog, hea vyspr ay,if th er eis
gl ar e, indir ect sunlight oringrea tly varying
ambien tlight .
R Ifth esensor sar edir ty,fo gg ed up, damag ed
or covered.
R Ifth esensor sar eim pair eddue tointerfer‐
ence from other radar sour ces, e.g.stro ng
ra dar reflect ions inpar king garage s.
R Ifaloss oftirepr essur eor afa ulty tirehas
been detected and displ aye d.
R IfDS Ris activ ated.
R Incom plextra ffic situat ionswher eobje cts
can notalw aysbe clear lyident ified.
R Ifpedes trians orvehicles movequickl yint o
th esensor detection rang e.
R Ifpe destrians arehidde nby other objects . 230
Driving andparking

1
Cruise contro lis selec ted
2 Spee dis save d, cruise control isdeactiv ated
3 Speed issave d, cruise control isactiv ated
% The segmen tsbetween thestor ed speed and
th eend ofthesegment displaylight upin
th espeedome ter.
Sy stem limit s
Cr uise control ma ybe unable tomaint ainthe
st or ed speed onuphill gradients. Thestor ed
speed isresumed whenthegr adient evensout.
Ch ang eint oalowe rge ar ingood timeon long
and steep downhill gradients. Take par ticular
no te ofthis when drivin galaden vehicle. By doing
so,youwill mak euse oftheengine' sbr ak‐
ing effect. Thisre lie vesth eload onthebr ak e
sy stem and preve nts thebr ak es from overheat‐
ing and wearing tooqu ickl y.
Do notus ecr uise contr olinthefo llo wing situa‐
tion s:
R Intraf fic situ ations whichrequ ire freq uent
ch ang esofspee d,e.g .in hea vytraf fic, on
wi nding roads.
R Onslippe ryroads. Accel erati ng can cause
th edr ive wheels tolose tract ion and the
ve hicle could then skid.
R Ifyo uar edr ivin gwhen visibilit yis poor .
Ope ratin gcr uis eco ntr ol &
WARNIN GRisk ofacci dent dueto stor ed
speed
If yo ucall upthestor ed speed andthis is
lo we rth an your cur rent spe ed,th eve hicle
deceler ates. #
Take intoacc ount thetra ffic situat ion
bef orecallin gup thestor ed speed. Re
quirement s:
R ESP®
mus tbe act ivat ed, but notint erve ning .
R The driven spe edisat leas t15 mp h
(20 km/ h).
R The transmis sionisin positio n005B. #
Toactiv atecr uise contr ol: press rock er
switc h1 up. 232
Driving andparking

No
teson DSR &
WARNIN GRisk ofskid ding and having
an acci dent whenDSR isacti vatedon
slipper yro ad sur faces
If th espeed driven and theta rget speed dif‐
fe r, and youact ivat eDS Ron aslipp eryro ad
sur face, thewheels maylose traction. #
Take intoacc ount thero ad sur face and
th edif fere nce betwee nth edr iving
speed andtarget speed beforeactiv at‐
ing DSR. If
yo ufa ilto adap tyo ur drivin gst yle, DS Rcan
neit her reduce therisk ofan accident norover‐
ri de thelaws ofphysics. Itcan notta ke into
acc ount road, weather ortraf fic condi tions.DSR
is only anaid. Youar ere sponsible formaint ain‐
ing asaf edis tance totheve hicle infront, for
ve hicle speed, forbr aking ingood timeandfor
st ay ing inlane.
Yo uar ealw aysre sponsible forke eping control of
th eve hicle andforasse ssing whether thedo wn‐
hill gradient canbemanag ed.Depen dingon
ro ad sur face and tires, DSR mayno tal wa ys be able
tokeep totheta rget speed. Selectata rget
speed suitable forth een vironmen talcon dition s
and also apply thebr ak es yourself ifre qu ired.
Ac tiv atin g/deac tivatin gDS R(vehi cles with
Of f-road package orE-Ac tiv eBody Contr ol)
Re quirement s:
R Youar edr ivin gat 24 mp h(40 km/h) or
slo wer.
If th ecur rent vehicle speed istoohigh, the
Max. Speed 24mph messag eappear sin the
multifu nctiondisplay.
R Youha ve notsel ect eddrive pr ogr am C or
B.
R ActiveDis tance AssistDIS TRONI Cis de acti ‐
va ted. #
Toactiv ate: pul lro ck er switc h1.
Indic ator lam p2 lights up.
The î symbol appearsin themultifunc ‐
tion displa y. #
Todeac tivate: pullro ck er switc h1.
Indic ator lam p2 and theî symbol go
out. 23
4
Driving andparking

th
ese tspeed. Thespeed anddistance tothe
ve hicle infront arese tand save don thesteer ing
wheel onvehicles without theDr iving Assistance
Pa ckag e, inthera ng ebe twee n15 mp h
(20 km/ h)and 120mp h(200 km/h) and,on
ve hicles withth eDr iving Assistance Packag e, in
th era ng ebe twee n15 mp h(20 km/h) and
13 0mp h(210 km/h) .The maximu mspe edis
re duced whendriving inLOW RANGEoff-r oa d
ge ar (/ page20 4).
Ot her featur esofActiveDis tan ceAssi st
DIS TRONI C:
R Adjus tsthedr iving style depending onthe
select eddrive pr ogra m(fuel efficie nt, com‐
fo rtable ordynam ic)(/ page19 6)
R Vehicl eswith Drivin gAss istanc ePa ck‐
ag e:react sto statio naryve hicles detected in
urb anspe edrang es (exc ep tbicy cles and
mo torcyc les)
R Initiates acc eler ation tothestor ed speed if
th etur nsignal indicat orisswitc hedonto
ch ang eto theove rtakin glane
R Vehicl eswith Drivin gAss istanc ePa ck‐
ag e:take sone-sided overtakin gre strictions int
oacco untonhighwaysor on multi-lane
ro ads withsepar atero adw ays(countr y-
dependen t)
Ve hicl eswith Activ ePa rking Assis tand Driv‐
ing Assis tance Packag e:ifth eve hicle has
been brak ed toast ands tillon mult i-lane,sepa‐
ra te roadw aysby ActiveDis tance Assist
DIS TRONI C,itcan automatical lyfollo wtheve hi‐
cle infront driving offag ain within 30seconds. If
a cr itical situation isde tected whe ndr ivi ng off,a
vis ualand acoustic warning isgiv en indic ating
th at thedr iver mus tno wtak econ trol of theve hi‐
cle. The vehicle isno tacceler ated anyfur ther.
Ac tiveDis tance AssistDIS TRONI Cis only anaid.
The driver isresponsible forke eping asaf edis‐
ta nce totheve hicle infront, forve hicle speed
and forbr aking ingood time.
Sy stem limit s
The system maybe impair edorma yno tfunc tion
in thefo llo wing situat ions:
R Insno w,rain, fog, hea vyspr ay,if th er eis
gl ar e, indir ect sunlight oringrea tly varying
ambien tlight . R
Ifth er eis swir ling dust,e.g. when driving off-
ro ad oron san dysur faces.
R The windsh ield inthear ea ofthecamer ais
dir ty,fo gg ed up, damag edorcovered.
R Ifth era dar sensor sar edir tyor covered.
R Inpar kingga rage sor on roads withsteep
uphill ordownhill gradients.
R Ifth er ear enar row vehicles infront, suchas
bicy cles ormo torcyc les.
In addition ,on slipper yro ads, brakin gor acc el‐
er atin gcan caus eon eor severalwheels tolose
tr act ion and theve hicle could then skid.
Do notuse ActiveDis tance AssistDIS TRONI Cin
th ese situation s. 236
Driving andparking