2021 MERCEDES-BENZ GLS SUV run flat

Light
andvisibili ty................................... 143
Ext eriorlighti ng............ ..............................143
Int erior lighti ng........ ......................... .......... 148
Wi ndsh ield wipe rand windsh ield wa sher
sy stem .................. ...................................... 150
Mir rors <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 155
Ar ea perm eable toradio wav eson the
winds hield.................................................. 158
Infr ared-r eflectiv ewindshi eldfunction ........ 158 Clim
atecontr ol........................................ 159
Ov ervie wof climat econt rolsy stems ..........1 59
Oper ating theclimat econ trol system ......... 160 Dr
ivin gand parking ................................. 168
Dr iving ............ ............ ........................ ........168
DY NA MIC SELE CTswitc h... ............... ......... 182
Au tomatic transmiss ion.................... .......... 185
Tr ans fercase ........... ................................... 189
Fu nctio nof the4MA TIC.............................. 191
Re fuel ing...... ............................................... 191
Pa rking .......................................................1 94
Dr iving and drivi ng safety systems .............. 201
Tr ailer hitch <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011> 269Ve
hicle towing instruct ions .............. ...........2 73 Ins
trum ent Disp layand on-b oard
com puter............ ............. ......................... 274
No teson theIns trument Displayand on-
boar dcom puter.............................. ............ 274
Ins trument Displayove rview .......................2 75
Ov ervie wof thebutt ons onthesteer ing
wheel ..........................................................2 76
Oper ating theon- boar dcom puter............... 276
Ov ervie wof what issho wnonthemulti‐
func tion displa y... ....................................... 278
Hea d-up Display ............ .............................278 MBUX
multimedia system ....................... 28 1
Ov ervie wand oper ation .................. ............ 281
Sy stem settings .............................. ............ 289
Na vig ation .......................................... ........292
Te lephon e........................................ ...........2 99
Mer cedes meand apps....... .............. .........302
Mer cedes -Benz emergency callsy stem ...... 309
Ra dio &media .................................. ...........3 13
Sou ndsettings <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011001100110011> 320 Main
tenance andcare............................. 321
ASS YSTPL US service interva ldispla y.........3 21
Engi necompar tment............ ...................... 322
Cl ea ning andcare............ ...........................328 Br
eak down assista nc e............ ................336
Emerg ency............. .....................................336
Flat tire....... ................................................ 338
Batt ery(v ehi cle) ....... .................................. 343
To w star tin gor towing away <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 349
Elec trica lfus es<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011001100110011> 353 Whe
elsand tires <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011> 356
No teson noise orunusua lhandling char‐
act eristic s...................................................3 56
No teson regular lyinsp ecting wheels and
tir es ............................................................ 356
No teson sno wch ains ................................ 357
Ti re pressur e.............................................. 357
Loading theve hicle .................................... 363
Ti re labeling ................................................ 367
Def inition ofterm sfo rtir es and loading ..... 372
Chan gingawheel .......................................3 75
Emerg encysparewh eel............ ..................385 Co
ntents 3

#
Establish theelectr icalconnect ionbetween
th eve hicle andthetra iler .
% Access oriescan beconnect edtotheper ma‐
nen tpo we rsupp lyup to180W and tothe
po we rsupp lythat isswit ched on via theigni‐
tion lock.
Un coup lingatrailer &
WARNIN GRisk ofbei ng crus hed and
beco ming trap ped whenunco upling a
tr ai le r
Whe nunco upling atrai le rwi th an eng aged
ine rtia-act ivat ed brak e, your han dma y
bec ome trapped between theve hicle andthe
tr ai le rdr aw bar . #
Donotuncouple trailer swit han
eng aged ove rrunbr ak e. *
NO
TEDama gewhen uncouplin gin a
st at eof ove rrun Unc
oupling inast at eof overru ncan dama ge
th eve hicle. #
Donotuncouple trailer swit han
eng aged ove rrunbr ak e. &
WARNIN GRisk ofbeco ming trap ped
whe ndisconnecti ngthetrailer cable
Ve hicl eswith leve lcontr olsystem: The
ve hicle maylo we rwhen thetra iler cable is
discon nected.
This could result inyouor other people
becoming trapped ifyo ur or their limbs are
be tween theve hicle body andthetir es or
under neathth eve hicle. #
Mak esur eth at nobody isunde rneat h
th eve hicle orintheimmediat evicinit y
of thewheel arch es when youdisc on‐
ne ct thetrailer cable. #
Disc onnect theelectr icalconnect ion
be tween theve hicle andthetra iler . #
Uncou ple th etra iler . #
Place theco vercap ontheball neckmount . Ve
hicl eto wing instruct ions
The vehicle isno tsuit able forth euse oftow bar
sy stems that areused forflat towing ording hy
to wing, forex am ple. Attach ing and using tow bar
sy stems canlead todamag eon theve hicle.
When youar eto wing ave hicle withto w bar sys‐
te ms, safedr iving charact eristic scan notbe
guar anteed forth eto wing vehicle ortheto we d
ve hicle. Thevehicle-tr ailercombination may
sw erve from side toside. Complywithth eper‐
mitt edtowing methods (/page349) andthe
ins truct ions forto wing withbo th axle son the
gr ou nd (/ page 350). Dr
iving andparking 27
3

Flat
tire No
tesin theeve ntofaflat tire &
WARNIN GRisk ofacci dent dueto aflat
tir e
A flat tirese verely affects thedr iving charac‐
te rist ics aswellas thesteer ing and braking
of theve hicle.
Ti re swith outrun-flat charact eristics : #
Donotdr ive wit haflat tire. #
Chan getheflat tireimm ediat elywit han
emer gency sparewheel orspar ewheel.
Alt ernat ivel y, consu ltaqu alif ied spe‐
cialis two rkshop.
Ti re swith run-flat charact eristics : #
Obse rveth einf ormation andwarning
no teson MOExt ended tires (run-f lat
tir e). In
theeve ntofaflat tire, thefo llo wing option s
ar eav ailable dependingon your vehicle's equip‐
ment :
R Vehicl eswith MOExt endedtir es: itis pos‐
sibl eto continu eth ejour neyfo ra shor t
per iod oftime. Makesur eyo uobse rveth e
no teson MOExt ended tires (run-f lattires)
(/ page338).
R Vehicl eswith aTIREF ITkit :yo ucan repair
th etir eso that itis poss ibletocontinu eth e
jou rney fora shor tper iod oftime. Todo this,
use theTIREFI Tkit (/ page339).
R Vehicl eswith Mercedes meconne ct:you
can makeacal lfo rbr eakdo wnassi stanc evia
th eov erhead control panel inthecase ofa
br eakdo wn(/ page304).
R Allvehicl es:chang eth ewheel
(/ page37 9).
% Theem erge ncy sparewheel isonl yav ailable
in cer tain coun tries. No
teson MOExt ended tires (run-fl attires) &
WARNIN GRisk ofacci dent whendr ivi ng
in limp -hom emod e
Whe ndr ivi ng ineme rgency modeth ehan‐
dling charact eristic sar eim pair ed. #
Donotexc eed thespecif iedmaximum
speed oftheMOEx tende dtir es. #
Avoid anyabr uptst eer ing and driving
maneuv ersas wellas drivin gove r
obs tacle s(cu rbs, pothol es, off-r oa d).
Thi sap plies, in pa rticular ,to aloaded
ve hicle. #
Stop driving intheemer gency mod eif
yo uno tic e:
R Ban gingno ise
R Vehicle vibration
R Smok ewhic hsmells likeru bber
R Contin uousESP®
int erve ntio n
R Crac ks inthetir eside walls #
Afterdr iving inemerg encymode, have
th erims checkedby aqu alif ied spec ial‐ 338
Break down assis tance

is
two rkshop withre ga rd totheir further
use. #
The defective tir emus tbe replaced in
eve rycase . Wi
th MOExt ended tires (run-f lattires), youcan
co ntinue todrive yo ur vehicle evenif th er eis a
tot alloss ofpressur ein on eor mor etir es. How‐
eve r,th etir eaf fect ed mus tno tsho wan ycle arly
vis ible da mag e.
Yo ucan recogni zeMOExt endedtir es by the
MOExt ended marking whichappear son theside
wa llof thetir e.
Ve hicl eswith tirepr ess uremonit oring sys‐
te m: MOExt endedtires ma yonly beused incon‐
junc tionwi th an act ivat ed tirepr essur emon itor‐
ing system.
If apr essur eloss warning mess ageappear sin
th emultifunc tiondispla y,proceed asfollo ws :
R Chec kth etir es fordama ge.
R Ifdr iving on,obser vethefo llo wing notes. Dr
iving distance possible inemer gency
mode afte rthe pres sur elo ss wa rning: Load
condit ion Driving distance pos‐
sible inemer gency
mode
Pa rtiall yladen 50miles (80km)
Fu lly laden 19mile s(30 km) The
driving distance possi ble in eme rgency
mod ema yva ry dependin gon thedr iving style.
Obser vethemaximum permissible speedof
50 mph(80 km/h).
If atir ehas gone flat and cannotbe replaced
wit han MOEx tende dtir e, youcan useast and‐
ar dtir eas ate mp orarymeasur e. TIREFIT
kitstorage location The
TIREF ITkit islocat edunder thecar gocom‐
par tmen tfloor . Ex
am ple: TIREFIT kit
1 Tire seala ntbottle
2 Tire inflation compressor Using
theTIR EFIT kit Re
quirement s:
R Tire seala ntbottle and tireinf lation compres‐
sor (/ page339).
R TIREFIT sticke r
R Gloves(depending ontheve hicle equipment)
Yo ucan useTIRE FITtir esealan tto seal perfora ‐
tio nda ma geofup to0.16 in(4 mm), particular ly Br
eakdo wnassis tance 33
9

th
ose inthetir econ tact surface. Youcan use
TIRE FITin out side temp eratur esdown to-4 °F
(-20 °C). &
WARNIN GRisk ofacci dent whenus ing
tir esea lant
The tiresea lant ma ybe una ble to seal the
tir epr op erly,especiall yin thefo llo wing
cases :
R Ther ear ecut sor punc tures inthetir e
larg erthan damag epr ev iousl ymen ‐
tion ed.
R The wheel rim isdama ged.
R Youha ve driven atvery low tirepr essur e
or on aflat tire. #
Donotcon tinue drivin g. #
Con sult aqu alif ied spec ialistwo rkshop. &
WARNIN GRisk ofinju ryand poiso ning
fr om tiresealan t
The tiresealan tis har mfuland caus esirrita ‐
tio n.Do notal lo w itto come intocont act wi
th theskin ,ey es orclo thing, and donot
sw allo wit. Do notinhale tiresealant fumes.
Ke ep thetir esealant away from childr en.
If yo uco me intoco ntact withth etir esealant,
obser vethefo llo wing: #
Rinse offth etir esealant from your skin
imm ediat elyusin gwa ter. #
Iftir eseal antgets int oyo ur eyes, thor‐
oughl yrinse outth eey es using clean
wa ter. #
Iftir eseal anthas been swallowe d,
immediat elyrinse outth emout hth or‐
oughl yand drink plenty ofwa ter.Do not
ind uce vomiting andseek medica l
att ention immedi ately . #
Cha ngeout ofanyclo thes con tamina‐
te dwit htir esealant immediat ely. #
Ifall ergic react ionsocc ur,seek medical
att ent ion imm ediat ely. *
NO
TEOverhea ting dueto thetir einf la‐
tion compressor running toolong #
Donotru nth etir einf lation compressor
fo rlong erthan tenminu teswit hout
int erru ption. Com
plywit hth emanuf acturer'ssafetyno teson
th est icke ron thetir einf lation compressor .
Ha ve thetir esealant bottle replaced inaqu ali‐
fi ed specialis two rkshop everyfive years. #
Donotre mo veanyfo re ign obje ctswhic h
ha ve ent ered thetir e. 34
0
Brea kdo wnassista nce

#
Affix pa rt1 oftheTIREFI Tst icke rto the
ins trumen tclus terwit hin thedr iver's field of
vision. #
Affix pa rt2 oftheTIREFI Tst icke rnear the
va lve on thewheel withth efa ulty tire. #
Pull plug 4withcabl eand hose5 out of
th etir einf lation compressor housing. #
Push plugofhose 5intoflang e6 oftire
sealan tbo ttle 1 untilth eplug engages. #
Place tiresealant bottle 1 head down wards
int ore cess 2ofthetir einf lation compres‐
sor . #
Remo vethecap from valve 7 onthefa ulty
tir e. #
Screw filling hose 8ontova lve 7. #
Insertplug 4intoa12 Vsoc ketin your
ve hicle. #
Switc hon theignition . #
Switc hon thetir einf lation compressor using
On/ Offswitc h3.
The tireis inf lated. First,tir esealant ispum‐
ped intoth etir e. The pressur ema ybr ief ly
ri se toappr oximat ely500 kPa(5 bar/7 3psi).
Do notswitc hof fth etir einflat ioncom pres‐
sor during this pha se. #
Letth etir einf lation compressor runfo ra
maximu mof tenminu tes.
The tireshould then have attaine datir e
pr essur eof at leas t20 0kP a(2. 0bar/
29 psi).
If tir esealan tleak sout ,mak esur eyo ucle an the
af fect ed area asquickl yas possible .It is prefer a‐
ble touse clean water.
If yo uge ttir ese alant onyour clo thing, have it
clean edassoon aspossible withper chlor oethy‐
len e.
If, afte rte nminut es,atir epr essur eof
200 kPa(2.0 bar/29 psi)hasnotbeen
attained: #
Switc hof fth etir einf lation compressor . Br
eakdo wnassis tance 34
1

Inflat
ingtheemer gency spar ewheel *
NO
TEOverhea ting dueto thetir einf la‐
tion compressor running toolong #
Donotru nth etir einf lation compressor
fo rlong erthan tenminu teswit hout
int erru ption. Re
quirement s:
Com plywit hth emanuf acturer'ssafetyno teson
th est icke rof theemer gency sparewheel andon
th etir einf lation compressor . #
Remo vesticke rwit hth elabel 50mph
(80 km/ h)fr om thetir einf lation compressor
housing andaffix it to theins trument cluster
wit hin thedr iver's field ofvision. #
Remo vethetir einf lation compressor from
th estor ag espace underthecar gocom part‐
ment floor (/ page339). #
Pull filler hose 1and plug 3out ofthetir e
inf lation compressor housing. #
Inser tplug 7offiller hose 1inthesoc ket
on thetir einf lation compressor andthen
tur nit until plug7eng ages. #
Unscr ew thecap from theva lve on theemer‐
ge ncy sparewheel. #
Screw union nut2offiller hose 1onto
va lve . #
Mak esur eon and offswitc h4 ofthetir e
inf lation compressor issetto 0. #
Inser tplu g3 inasoc ketin your vehicle.
R 12Vsoc ket:(/ pag e13 5) R
Obse rveth eno teson soc kets: (/ page 135) #
Press thest ar t/ stop butt ononce toswitc h
on thepo we rsupp ly.(/ page 168) #
Press On/Of fswi tch4 onthetir einf lation
com pressor toI.
The tireinf lation compressor isswitc hedon.
The tireis inf lated. The tirepr essur eis
sho wnonmanome ter5. #
Pum pth etir eto thespecif iedtirepr essur e.
% The specif iedtirepr essur eis stat ed on the
label oftheemer gency sparewheel. #
When thespecif iedtirepr essur ehas been
re ac hed, press onand offswit ch4 onthe
tir einf latio ncom pres sor to0.
The tireinf lation compressor isswitc hedoff. #
Press thest ar t/ stop butt ontoswitc hof fth e
po we rsupp ly. #
Ifth etir epr essur eis higher than thespeci‐
fi ed pressur e,press pressur ere lease valve
bu tton 6 unti lth ecor rect tirepr ess ureha s
bee nre ac hed. 386
Wheelsand tires

Re
mo ving the collapsi blespar ewh eel The
collaps ible sparewh eelis locat ed und erthe
cargo compartment floor . #
Obser vetheinf ormation onmount ingtires
(/ page37 5). #
Open theta ilg ate. #
Open thecar gocom partmen tfloor . #
Remo vethecollapsible sparewheel.
Mer cedes‑Ma ybachve hicl es
Wi thout refrig er ator box:The colla psiblespar e
whee lis locat edinthecollapsible sparewheel
bag onthecar gocom partmen tfloor . #
Obser vetheno teson mounting tires
(/ page37 5). #
Open thecar gocom partmen t. #
Detach thesecur ingstra ps. #
Unhook there tainin gspr ing hook sof the
secur ingstra ps from thebr ac kets. #
Remo vethecollapsible sparewheel bag
to ge ther wit hth ecollapsible sparewheel. #
Open thecollapsible sparewheel bagand
re mo vethecollapsible sparewheel.
Wi th refrig er ator box:The colla psiblespar e
whee lis locat edinthecollapsible sparewheel
bag inside theopen cargocom partmen tfloor . #
Obser vetheinf ormation onmount ingtires
(/ page37 5). #
Open thecar gocom partmen t. #
Detach thesecur ingstra ps. #
Unhook there tainin gspr ing hook sof the
secur ingstra ps from thebr ac kets. #
Remo vethecollapsible sparewheel bag
to ge ther wit hth ecollapsible sparewheel. #
Open thecollapsible sparewheel bagand
re mo vethecollapsible sparewheel. Inflating
thecollap siblesparewheel Re
quirement s:
R Mount thecollapsible sparewheel asdescr i‐
bed (/page383). R
Remo vethetir einf lation compressor from
th estor ag ewe llunder thetrunk floor
(/ page339).
* NO
TEDama getothecollapsible spare
wheel whenlowe ring theve hicle Lo
we ring theve hicle without prev iousl y
inf latin gth ecollapsible sparewheel can
damag eits rim. #
Inflateth ecollapsible sparewheel using
th etir einf lation compressor before
lo we ring theve hicle. *
NO
TEOverhea ting dueto thetir einf la‐
tion compressor running toolong #
Donotru nth etir einf lation compressor
fo rlong erthan tenminu teswit hout
int erru ption. 388
Wheels andtires