2020 MERCEDES-BENZ GLA SUV ECU

X
Turn theSmart Keytoposition 005Ainthe igni-
tion lock andremove it.
X Secure thevehicle.
The towing eyecan beused topull thevehicle
ont oatrailer ortrans porter fortrans portin g
purposes. Notes
on4MATIC vehicles
! Vehicles
with4MATI Cmust notbetowed
with either thefront orthe rear axle raised,
as doing sowill damage thetrans mission.
Vehicles with4MATI Cmay onlyeither be
towed awaywithboth axles onthe ground or
be loaded upand trans ported.
If the vehicle's transmission, front,or rear axle
is damaged, havethevehicle transported ona
truck ortrailer.
In the event ofdam agetothe electrical
system:
If the battery isdefect ive,theautomatic trans-
mission willbelocked inposition 005D.Toshift
the automatic transmission toposition 005C,you
must provide powertothe vehicle's on-board
electric alsystem inthe same wayaswhen
jump-st arting(Ypage 296).
Have thevehicle transported onatrans porter
or trailer. Tow-star
ting(emergency engine
star ting)
! Vehicles
withautomatic transmission must
not betow-st arted. Youcould otherwise
damage theautomatic transmission.
i You
canfind inform ationon"Jump-start-
ing" under (Ypage 296). Fuses
Import
antsafety notes G
WARNIN
G
If you manipulate orbridge afaulty fuseorif
you replace itwith afuse withahigher
amperage, theelectric cablescouldbeover-
loaded. Thiscould result inafire. There isa
risk ofan accident andinjury. Always
replace faultyfuseswiththespeci-
fied new fuses having thecorrec tamperage.
! Only
usefuses thathave been approved
for Mercedes- Benzvehicles andwhich have
the correc tfuse rating forthe system con-
cern ed.Only usefuses marked withan"S".
Otherwise, componentsorsystems couldbe
damaged.
! Make
surethatnomoisture canenter the
fuse boxwhen thecover isopen.
! When
closing thecover, makesurethatit
is lying correc tlyon the fuse box. Moisture
seeping inor dirt could otherwise impairthe
operation ofthe fuses.
The fuses inyour vehicle servetoclose down
faulty circuits. Ifafuse blows, allthe compo-
nent son the circuit andtheir functionsstop
operating.
Blown fusesmustbereplaced withfuses of
the same rating, whichyoucan recogn izeby
the color andvalue. Thefuse ratings, and
other items ofinform ationtobe complied with
are, listed inthe fuse allocation chart.
The fuse allocation chartisin the fuse boxin
the front -passenger footwell(Ypage 303).
If anewly insertedfuse alsoblows, havethe
cause traced andrectified ataqualified spe-
cialist workshop, e.g.anauthorized Mercedes-
Benz Center. Before
changing afuse
X Secure thevehicle against rollingaway
(Y page 145).
X Switch offallelectric alconsumer s.
X Vehicles withoutKEYLESS-GO: remove
the Smart Keyfrom theignition lock.
X Vehicles
withKEYL ESS-GO start-func-
tion orKEYL ESS-GO: openthedriver's
door.
The vehicle electron icsare now inposition
005A. This isthe same asthe Smart Keybeing
removed fromtheignition.
The fuses arelocated invarious fuseboxes:
R Fuse boxinthe engine compart mentonthe
left- hand sideofthe vehicle, whenviewed in
the direction oftravel
R Fuse boxinthe front -passenger footwell 302
FusesBr
eakdown assistance

Imp
ortant safety notes G
WAR
NING
If you installwhee lsand tires withinc orrect
dime nsion s,theser vicebrak eor whee lsus-
pen sion compo nentsmay bedamag ed.
Ther eis aris kof an acc iden t.
Alw ays replace whee lsand tires withon es
th at comply withth espec ificationsof the
ori gin alpart .
When replaci ngwhee ls,pay attention tothe:
R De sign ation
R Mode l
When replaci ngtires ,pay attention tothe:
R De sign ation
R Man ufacturer
R Mode l G
WAR
NING
A flat tire will severelyaff ectth edriv ing
ch arac teris tics as well asthest eer ing and
brak ingoftheveh icle. Ther eis aris kof an
acc iden t.
Tir es wit hout run-flat charac teris tics :
R Do notdriv eon withaflat tire.
R Chan getheflat tire imm ediat elywithan
eme rgencyspar ewhee lor spar ewhee l.
Alt ern ativel y,co nsult aqualif iedspec ialist
wor kshop.
Tir es wit hrun -flat charac teris tics :
R Obs erveth einf orm ation and warn ing
no teson MOE xten ded tires (run -flat tires ).
Ac cesso ries that are notappr ovedfor your
veh icleby Mer cedes- Benzor are notbein g
used correc tly can impa irth eoper ating safety.
Bef ore purc hasingand usingno n-appr oved
acc essories, visitaqualif iedspec ialist work-
sho pand inquire about :
R suit abilit y
R legal stipulat ions
R fac tory rec omm endat ions
Fur ther inform ation reg ardi ngwhee lsand tires
can befoun dund er"Whee l/tire combin ations"
(Y page 330). You
canaskforinform ation reg ardi ngper mit-
te dwhee l/tire combin ationsat an auth orized
Mer cedes- BenzCen ter.
In for mat ionontire pre ssur ecan befoun d:
R on theTir eand Load ingInfor mat ionplac ard
on theB- pillar onthedriv er'sside
(Y page 317)
R in thetire pre ssur etab lein thefuel filler flap
(Y page 144)
R und er"Tir epre ssur e"(Y page 308) Op
era tion Infor
mation ondrivin g
Chec kth etire pre ssur ewhen theveh icleis
heav ilyladen andadjust prio rto atrip.
While driving,pay attention tovibr ations,
no ises andunus ualhan dlingch arac teris tics ,
e. g. pullin gto oneside .This may indicat eth at
th ewhee lsor tires are damag ed.Ifyou sus-
pec tth at atire isdef ective, reduce your speed
imm ediat ely.Stop theveh icleas soo nas pos -
sible tocheckth ewhee lsand tires fordam-
age. Hidden tire damag eco uld also becaus ing
th eunus ualhan dlingch arac teris tics .If you
fin dno sign sof damag e,hav eth etires and
whee lsch ecke dat aqualif iedspec ialist work-
sho p.
When parkingyour vehicle, mak esur eth at the
ti res donotget deform edbythecur bor other
obs tacles. Ifth ey can notbe avoi ded, drive
ove robs tacles suc has cur bsslow lyand atan
obt use angle.Other wise, youmay damag eth e
whee lsor tires . Reg
ularcheck ingofwheels andtires G
WAR
NING
Dam aged tires can caus etire inflat ion pres-
sur eloss .As ares ult,you could lose control
of your vehicle. Ther eis aris kof acc iden t.
Chec kth etires regularly forsign sof dam-
age and replace anydamag edtires imm edi-
ate ly. Op
era tion
305Wheels andtire s Z

Underinflated
tiresmay:
R overheat, leadingtotire defects
R adversely affecthandling
R wear excessively and/orunevenly
R have anadverse effectonfuel consumption
Overinflated tires G
WARNING
Tires withexcessively highpressure can
burst because theyaredamage dmore eas-
ily by road debris, potholes etc.Inaddition,
they alsosuffer fromirregula rwear, which
can severely impairthebraking properties
and thedriving characteristics. Thereisa
risk ofan accident.
Avoid tirepressures thataretoo high inall
the tires, including thespare wheel.
Overinflated tiresmay:
R increase thebraking distance
R adversely affecthandling
R wear excessively and/orunevenly
R have anadverse effectonride comfort
R be more susceptible todamage
Maximum tirepressures 0043
Example: maximum permissibletire pres-
sure
Never exceed themaximum permissibletire
inflation pressure. Alwaysobserve therecom-
mended tirepressure foryour vehicle when
adjusting thetire pressure (Ypage 308).
i The
actual valuesfor tires arevehicle-spe-
cific andmay deviate fromthevalue sin the
illu stration. Checki
ngthe tire pressures
Importa ntsafety notes The
tirepressure monitordoesnotwarn you
of:
R incorrect lyset tire pressure
R sudden lossoftire pressure, e.g.from afor-
eign object thathaspenetrated thetire
Observe thenotes ontire pressure
(Y page 308).
Information onair pressure forthe tires on
your vehicle canbefound:
R on the vehicle's TireandLoading Informa-
tion placard onthe B-pillar
R in the tire pressure tableinthe fuel filler flap
(Y page 144)
R in the "Tire pressure" section
Checki ngtire pressures manually To
determine andsetthe correct tirepressure,
proceed asfollows:
X Remove thevalve capofthe tire that isto
be checked.
X Press thetire pressure gaugesecurely onto
the valve.
X Read thetire pressure andcompare itto the
recommended valueonthe Tire andLoading
Information placardorthe tire pressure
table (Ypage 308).
X Ifthe tire pressure istoo low, increase the
tire pressure tothe recommended value.
X Ifthe tire pressure istoo high, release air.
To do so, press downthemetal pininthe
valve, usingthetipofapen forexample.
Then check thetire pressure againusing the
tire pressure checker.
X Screw thevalve caponto thevalve.
X Repea tthese stepsforthe other tires. Tire
pressure losswarning system
(Canada only)
General notes While
thevehicle isin motion, thetire pres-
sure losswarning systemmonitors thesettire
pressure usingtherotational speedofthe
wheels. Thisenables thesystem todetect sig-
nificant pressure lossinatire. Ifthe speed of Tire
pressure
311Wheelsandtires Z

Observe
theinstruct ionsandsafety notesin
the displa ymessages inthe "Tires" section
(Y page 224).
If the wheel positions onthe vehicle arerota-
ted, thetire pressures maybedispla yedfor
the wrong positions forashort time.Thisis
rectified afterafew minutes ofdriving, andthe
tire pressures aredispla yedforthe correct
positions.
Restart ingthe tire pressure monitor When
yourestart thetire pressure monitor,all
existing warning messages aredeleted andthe
warning lampsgoout. Themonitor usesthe
currently settire pressures asthe reference
value sfor monitoring. Inmost cases, thetire
pressure monitorwillautomaticall ydetect the
new reference valuesafter youhave changed
the tire pressure. However, youcan also set
reference valuesmanuall yas described here.
The tirepressure monitorthenmonitors the
new tirepressure values.
X Set thetire pressure tothe value recom-
mended forthe corresponding drivingsitua-
tion onthe Tire andLoading Information
placard onthe driver's side
B-pillar (Ypage 308).
You canfind more tirepressure valuesfor
various operating conditions inthe tire pres-
sure table inside thefuel filler flap
(Y page 144).
X Make surethatthetire pressure iscorrect
on allfour wheels.
X Make surethattheSmartKey isin position
0048 inthe ignition lock(Ypage 125).
X Press 0059or0065 onthe steering wheel
to select theServ. Serv.
menu.
X Press the0063 or0064 button toselect
Tire Pressure Tire
Pressure.
X Press the0076 button.
The multifunction displayshows thecurrent
tire pressure foreach tireorthe Tire Tire
pressure willbedisplayed after pressure
willbedisplayed after
driving afew minutes driving
afew minutes message.
X Press the0064 button.
The multifunction displayshows theUse Use
Current Pressures asNew Reference Current
Pressures asNew Reference
Values Values
message. If
you wish toconfirm therestart :
X Press the0076 button.
The Tire Press. Monitor Restarted Tire
Press. Monitor Restarted
message appearsinthe multifunction dis-
play .
After driving forafew minutes, thesystem
checks whether thecurrent tirepressures
are within thespecified range.Thenew tire
pressures arethen accepted asreference
value sand monitored.
If you wish tocance lthe restart :
X Press the0038 button.
The tirepressure valuesstored atthe last
restart willcont inue tobe monitored. Tire
pressur e
315Wheels andtires Z

pounds
persquare inch(psi), inkilopascal
(kPa) orinbar. Thetirepressure shouldonly
be corr ectedwhen thetires arecold.
Cold tirepr essure
The tires arecold:
R ifthe vehicle hasbeen parked withthetires
out ofdirect sunlight foratleast three hours
and
R ifthe vehicle hasnotbeen driven further
than 1mile (1.6km)
Tr ead
The part ofthe tire that comes intocon tact
with theroad.
Bead The tirebead ensures thatthetire sits
securely onthe wheel. Thereareseveral steel
wires inthe bead topreven tthe tire from com-
ing loose fromthewheel rim.
Sidewall The part ofthe tire between thetread andthe
bead.
Weight ofoptiona lextr as
The combin edweight ofthose option alext ras
that weigh morethanthereplaced standard
parts andmore than2.3kg(5lbs). These
option alext ras, such ashigh-per formance
brakes, levelcontrol, aroof rack orahigh-per -
form ance battery,are not included inthe curb
weight andtheweight ofthe access ories.
TIN (Tire Identificat ionNum ber)
This isaunique identifierwhich canbeused
by atire manufact urertoident ifytires, for
example foraproduct recall,andthus ident ify
the purchasers .The TINismade upofthe
manufact urer'sidentitycode, tiresize, tire
type code andthemanufac turingdate.
Load bearing index
The load bearing index(alsoloadindex )is a
code thatcontains themaximum loadbearing
capacit yof atire.
Tr action
Tract ionisthe result offric tion between the
tires andtheroad surface. Tr
eadwear indicators
Narrow bars(tread wearbars) thataredistrib-
uted overthetire tread. Ifthe tire tread islevel
with thebars, thewear limitof00CD in(1.6 mm)
has been reached.
Occupant distribut ion
The distribut ionofocc upants inavehicle at
their designat edseatin gposition s.
Tota lload limit
Nomin alload andluggage loadplus68kg
(150 lbs)multiplied bythe number ofseats in
the vehicle. Changing
awheel Flat
tire
The "Breakdown assistance"sect ion
(Y page 288)con tains information andnotes
on how todeal with aflat tire. Informat ionon
driving withMOEx tended tires inthe event ofa
flat tire can befound under "MOEx tended tires
(tires withrun-flatcharact eristics"
(Y page 289). Rota
tingthewheels G
WARN
ING
Rotatin gthe fron tand rear wheels ifthe
wheels ortires have differen tdimension s
may severely impairthedriving charact eris-
tics .The servic ebrake orwheel suspension
compon entsmay alsobedamaged. Thereis
a risk ofan acciden t.
Rotate frontand rear wheels onlyifthe
wheels andtires areofthe same dimen-
sions.
! On
vehicles equipped withatire pressure
monit or,elect ronic compon entsare located
in the wheel.
Tire-m ountin gtools should notbeused near
the valve. Thiscould damage theelect ronic
compon ents.
Only have tireschang edataqualified spe-
cialist worksh op.
Observe theinstruct ions andsafety notesin
the "Changing awheel" section(Ypage 326). 326
Changing
awheelWheels andtires

The
wear pattern son the front andrear tires
differ, depending onthe operating conditions.
Rotate thewheels beforeaclear wearpattern
has formed onthe tires. Fronttires typically
wear more onthe shoulders andtherear tires
in the cent er.
On vehicles thathave thesame sizefront and
rear wheels, youcan rotat ethe wheels accord-
ing tothe inter valsinthe tire manufact urer's
warranty bookinyour vehicle document s.Ifno
warranty bookisavailabl e,the tires should be
rotat edevery 3,000 to6,000 miles(5,000 to
10,00 0km). Dependin gon tire wear, thismay
be required earlier.Donot change thedirec-
tion ofwheel rotation.
Clean thecont actsurfaces ofthe wheel and
the brake discthoroughly everytimeawheel
is rotat ed.Check thetire pressure and,ifnec-
essary, restartthetire pressure losswarning
system (Canada only)orthe tire pressure
monit or(USA only). Direction
ofrota tion
Tires withaspecified directionofrotat ionhave
additional benefits,e.g. ifthere isarisk of
hydroplaning. Theseadvantages canonly be
gained ifthe tires areinstalled correspon ding
to the direction ofrotat ion.
An arrow onthe sidewall ofthe tire indicates
its correc tdirection ofrotat ion. Storing
wheels
Stor ewheels thatarenot being usedinacool,
dry and preferably darkplace. Protectthe tires
from oil,grease, gasoline anddiesel. Mounting
awheel
Prepa ringthevehicle X
Stop thevehicle onsolid, non-slippery and
level ground.
X Apply theelectric parking brakemanually.
X Bring thefront wheels intothestraight-
ahead position.
X Shift thetrans mission toposition 005D.
X Switch offthe engine. X
Vehicles withoutKEYLESS-GO: remove
the Smart Keyfrom theignition lock.
X Vehicles
withKEYL ESS-GO start-func-
tion orKEYL ESS-GO: openthedriver's
door.
The vehicle electron icsare now inposition
0092. This isthe same as“key removed”.
X Vehicles
withKEYL ESS-GO start-func-
tion orKEYL ESS-GO: removetheStart /
Stop button fromtheignition lock
(Y page 125).
X Make surethattheengine cannotbe start ed
via your smartphon e(Y page 84).
X Ifincluded inthe vehicle equipment, remove
the tire- change toolkitfrom thevehicle.
X Safeguard thevehicle against rollingaway
(Y page 145).
i Apart
fromcertaincount ry-specific varia-
tions, thevehicles arenot equipped witha
tire- change toolkit.Some toolsforchanging
a wheel arespecific tothe vehicle. Formore
inform ationonwhich toolsarerequired to
perform awheel change onyour vehicle,
consult aqualified specialist workshop.
Necessary tire-changing toolscaninclude,
for example:
R Jack
R Wheel chock
R Lug wrench
Securing thevehicle toprevent itfrom
rolling away If
your vehicle isequipped withawheel chock,
it can befound inthe tire- change toolkit
(Y page 288).
The folding wheelchock isan additional safety
measure toprevent thevehicle fromrolling
away ,for example whenchanging awheel. Changing
awheel
327Wheels andtires Z

X
Fold both plates up0043.
X Fold outlow erpla te0044.
X Gu ide the lugs on the lowerpla tefullyinto
the openings inba se pla te0087. X
Pla cechocks orother suitabl eitems under
the front andrearof the whe elthat isdia go-
nal lyopp ositethe whe elyouwi sh to
chang e.
Raisi ngthe vehicle G
WARNI
NG
If yo udo not positionthe jack corre ctlyat
the approp riate jacking pointofthe vehi cle,
the jack couldtip over with the vehi cle
rai sed .The reisarisk ofinjur y.
Only positionthe jack atthe approp riate
jacking pointofthe vehi cle. The base ofthe
jack mustbe pos itioned verti cally,dir ectly
und erthe jacking pointofthe vehi cle.
! Only
positionthe jack atthe approp riate
jacking pointofthe vehi cle. Otherw ise,yo u
cou ldda mag ethe vehi cle.
Obs erve thefollowi ng whe nraisi ngthe
veh icle :
R To raise the vehi cle, only usethevehi cle-
spe cificjack thathasbeentested and
ap prov edbyMerce des-Benz. Ifuse dincor-
rectly ,the jack couldtip over with the vehi -
cle raised .
R The jack isdes igne donly toraise and hold
the vehi cleforashor ttime whileawhe el
is bei ng chang ed.Itmus tnot beuse dfor
per formi ngmai ntenance workund erthe
vehi cle.
R Avoid changingthe whe elon uphilland
dow nhillslo pes . R
Befor erai sing thevehi cle, secu reitfrom
rol ling away by apply ing the parking brake
and inserting wheelchocks. Donot disen-
ga ge the parking brakewhi lethe vehi cleis
rai sed .
R The jack mustbe placed onafirm, flatand
non-sli psur face .On aloo sesur face ,a large,
fla t,loa d-be aring und erlay mus tbe use d.On
a sli ppe rysur face ,a non-sli pund erlay mus t
be use d,e.g. rubber mats.
R Do not use wooden blocks orsimi larobje cts
as ajack underlay.Otherw ise,the jack will
not beableto achi eveitsload-be aring cap a-
city dueto the restri ctedheight.
R Make surethat thedistance betweenthe
und ersideofthe tires andthegrou nddoe s
not excee d1.2 in(3 cm).
R Neve rpla ceyour hand sand feet underthe
rai sed vehicle.
R Do not lie und erthe vehi cle.
R Do not start theengi newhe nthe vehi cleis
rai sed .
R Neve rope nor clos eadoo ror the tailga te
whe nthe vehi cleisrai sed .
R Make surethat noper sons arepresent in
the vehi clewhe nthe vehi cleisrai sed . X
Usi nglug wre nch 0043,loosen theboltson
the whe elyouwi sh tochang eby abou tone
ful lturn. Donot unscre wthe boltscom-
ple tely . 328
Chan
ging awhe elWhee lsand tires

Jack
ingpoin ts
The jackin gpoin tsare locat edjustbehin dth e
fro ntwheel housin gsand justin fro ntofthe
rear wheel housin gs(arr ows). X
Take ratche twren ch0085 out ofthevehi cle
to ol kit and place iton thehex agon nutof
jac k0087 sothat thelet ter sAUF arevisib le.
X Posit ionjack0087 atjac kin gpoin t0044. X
Mak esure thefoo tof thejac kis direc tly
ben eath thejac kin gpoin t. X
Turn ratche twren ch0085 untiljac k0087 sits
com pletelyonjackin gpoin t0044 and thebase
of thejac klies even lyon thegroun d.
X Turn ratche twren ch0085 untilth etir eis
raise damax imum of1.2in (3 cm )fro mthe
groun d.
Rem oving awheel !
Do
not place wheel boltsin san dor on a
dirt ysurf ace. Thebolt andwheel hub
th reads couldotherwi sebe damage dwhen
you screw them in.
X Un scr ew thewheel bolts.
X Remov eth ewheel.
Moun tinganew wheel G
WAR
NING
Oiled orgreas edwheel boltsor damage d
wheel bolts/hubthreads cancause the
wheel boltsto com eloose .As ares ult, you
could loseawheel whiledriving.Ther eis a
risk ofacc iden t.
Nev eroil orgreas ewheel bolts.In theeven t
of damage totheth reads ,con tacta quali-
fied spec ialist workshop immediat ely.Have
th edamage dwheel boltsor hub threads
replac ed/renewed. Donot continue driv ing. G
WAR
NING
If you tighten thewheel boltsor wheel nuts
when thevehi cleisraise d,thejac kcould tip
over .Ther eis arisk ofinjury.
On lytig hten thewheel boltsor wheel nuts
when thevehi cleison thegroun d.
Always payattent ion totheins truct ionsand
safe tynot esinthe"Chang ingawheel" section
(Y page 326).
On lyuse wheel boltsth at have been designed
for thewheel andthevehi cle. Forsafe tyrea-
son s,Merc edes- Benzrec omm endsth at you
onl yuse wheel boltswhic hhave been
appro vedforMerc edes- Benzvehi cles andthe
res pec tivewheel.
! To
prev entdamage tothepaint work,hold
th ewheel securely agains tth ewheel hub
while screwin gin thefir st wheel bolt. Cha
nging awheel
329Wheels andtires Z