steering MERCEDES-BENZ GLA 2020 Owner's Guide

rotation
ofawhee lchanges asaresul tof a
loss ofpressu re,acorrespo ndingwarning
messa gewillapp ear inthe multi function dis-
pla y.
You canrecognize thetire pressu reloss warn-
ing bythe Run Flat Indicato rActive Run
Flat Indicato rActive
Press 'OK'toRestart Press
'OK'toRestart messageinthe mul-
tifunction displayinthe Serv. Serv.
menu. Informa-
tion onthe messa gedisp laycan befound in
the "Restarting thetire pressu reloss warni ng"
section (Ypag e312) .
Important safetynotes The
tirepressu rewarni ngsystem doesnot
warn youofan incorrectly settire pressu re.
Observe thenotes onthe recommended tire
pressu re(Y pag e308) .
The tirepressu reloss warni ngdoes not
repla cethe need toregu larlycheck thetire
pressu re.Aneven lossofpressu reon severa l
tires atthe same timecannot bedetected by
the tire pressu reloss warni ngsystem.
The tirepressu remonitor isnot ableto warn
you ofasudd enloss ofpressu re,e.g. ifthe
tire ispenetrated byaforeig nobject. Inthe
event ofasudd enloss ofpressu re,bring the
vehicl eto ahal tby braking carefully.Avoid
abru ptsteering movements.
The function ofthe tire pressu reloss warni ng
system islimi ted ordela yedif:
R snow chains aremounted onyou rvehicl e's
tires.
R road conditions arewintry.
R you aredrivi ngon sand orgravel .
R you adoptavery sporty drivingstyle (corner-
ing athigh speedsordrivi ngwith high rates
of accele ration).
R you aredrivi ngwith aheavy load(in the
vehicl eor on the roof)
Restarting thetire pressure losswarn-
ing system Resta
rtthe tire pressu reloss warni ngsystem
if you have:
R changed thetire pressu re
R changed thewhee lsor tires
R mounted newwhee lsor tires
X Before restarting, makesurethatthetire
pressu resare setprope rlyon allfour tires
for the respe ctiveopera tingconditions. The
recommended tirepressu recan be
found onthe Tire andLoad ingInformation
pla card onthe B-pill ar.Additio nally,atire
pressu retable isattached tothe fuel filler
flap .The tirepressu reloss warni ngsystem
can only givereliablewarni ngsifyou have
set the correct tirepressu re.Ifan incorrect
tire pressu reisset, these incorrect values
wil lbe monitored.
X Also observe thenotes inthe section ontire
pressu res(Ypag e308) .
X Make surethattheSmartKey isin posi tion
0048 inthe ignitio nlock (Ypag e125).
X Press 0059or0065 onthe steering wheel
to sele ctthe Serv. Serv.
menu.
X Press the0063 or0064 button tosele ct
Tire Pressure Tire
Pressure .
X Press the0076 button.
The Run Flat Indicato rActive Press Run
Flat Indicato rActive Press
'OK' toRestart 'OK'
toRestart messageapp ears inthe
multi function display.
If you wishto con firm therestart:
X Press the0076 button.
The Tire Pressure NowOK? Tire
Pressure NowOK?messa ge
app ears inthe multi function display.
X Press the0063 or0064 button tosele ct
Yes Yes.
X Press the0076 button.
The Run Flat Indicato rRestarte d Run
Flat Indicato rRestarte dmes-
sage appears inthe multi function display.
After ateach-in period,the tire pressu re
loss warni ngsystem willmonitor thesettire
pressu resofall four tires.
If you wishto canc elthe restart:
X Press the0038 button.
or
X Ifthe Tire Pressure NowOK? Tire
Pressure NowOK?messa ge
app ears, press the0063 or0064 button to
sele ctCancel Cancel.
X Press the0076 button.
The tirepressu revalu esstored atthe last
restart willcontinue tobe monitored. Tire
pressure monitor(Can adaonly)
Gene ralnotes If
atire pressu remonitor isinstall ed,the vehi-
cle's whee lshave sensors thatmonitor thetire
pressu resinall four tires. Thetirepressu re 312
Tire
pressureWhee lsand tires

The
tirepressure monitordoes notwarn youof
an incorr ectlysettire pressure. Observethe
not eson the recomm endedtirepressure
(Y page 308).
The tirepressure monitorisnot able towarn
you ofasudden lossofpressure, e.g.ifthe
tire ispenetr atedbyaforeign object.In the
event ofasudden lossofpressure, bringthe
vehicle toahalt bybraking carefully. Avoid
abrupt steeringmovemen ts.
The tirepressure monitorhas ayellow warning
lamp inthe instr ument cluster forindicatin g
pressure lossoramalfunct ion.Whether the
warning lampflashes orlights upindicates
whether atire pressure istoo low orthe tire
pressure monitorismalfunct ioning:
R ifthe warning lampislit cont inuously, the
tire pressure onone ormore tiresissignifi-
cant lytoo low. Thetirepressure monitoris
not malfunct ioning.
R ifthe warning lampflashes foraround a
minute andthen remains litconst antly, the
tire pressure monitorismalfunct ioning.
In addition tothe warning lamp,amessage
appears inthe multifunct iondisplay .Observe
the inform ationondisplay messages
(Y page 224).
It may take uptoten minutes foramalfunc-
tion ofthe tire pressure monitortobe indica-
ted. Amalfunct ionwill beindicated bythe tire
pressure warninglampflashing forapprox-
imately oneminute andthen remaining lit.
When themalfunct ionhas been rectified, the
tire pressure warninglampgoesoutafter a
few minutes ofdriving.
The tirepressure valuesindicated bythe on-
board computer maydiffer fromthose meas-
ured atagas station withapressure gauge.
The tirepressures shownbythe on-board
computer refertothose measured atsea level.
At high altitudes, thetire pressure valuesindi-
cated byapressure gaugearehigher than
those shown bythe on-board computer. Inthis
case, donot reduce thetire pressures.
The operation ofthe tire pressure monitorcan
be affect edbyinter ferenc efrom radio trans-
mitt ingequipment (e.g.radio headphones,
two-way radios)thatmay bebeing operated in
or near thevehicle. Checking
thetire pressur eelectroni-
cally X
Make surethattheSmart Keyisin position
0048 inthe ignition lock(Ypage 125).
X Press 0059or0065 onthe steerin gwheel
to select theServ. Serv.
menu.
X Press the0063 or0064 button toselect
Tire Pressure Tire
Pressure.
X Press the0076 button .
The current tirepressure ofeach tireis
shown inthe multifunct iondisplay .
If the vehicle wasparked forlonger than
20 minutes, theTire pressure willbe Tire
pressure willbe
displayed afterdriving afew minutes displayed
afterdriving afew minutes
message isshown.
Aft erateach- inprocess, thetire pressure
monit orautomatically detectsnew wheels or
new sensors. Aslong asaclear allocation of
the tire pressure valuetothe individual wheels
is not possible, theTire Pressure Monitor Tire
Pressure Monitor
Active Active
message isshown instead ofthe tire
pressure display.The tirepressures are
already beingmonitored.
If an emergenc yspare wheel ismounted, the
system maycontinue toshow thetire pressure
of the wheel thathasbeen removed forafew
minutes. Ifthis occurs, notethat thevalue dis-
played forthe position wherethespare wheel
is fitt ed isnot thesame asthe current tire
pressure ofthe emergenc yspare wheel.
Tire pressur emonitor warning mes-
sages If
the tire pressure monitordetect sa pressure
loss inone ormore tires,awarning message is
shown inthe multifunct iondisplay .The yellow
tire pressure warninglampthenlights up.
R Ifthe Please Correct TirePressure Please
Correct TirePressure
message appearsinthe multifunct iondis-
play, thetire pressure inat least onetireis
too low. Thetirepressure mustbecorrec ted
when theopportunit yarises.
R Ifthe Check TirePressure Check
TirePressure message
appears inthe multifunct iondisplay ,the tire
pressure inone ormore tireshasdropped
significant ly.The tires must becheck ed.
R Ifthe Tire Pressure WarningTire Tire
Pressure WarningTire
Failure Failure
message appears,thetire pressure
in one ormore tireshasdropped suddenly.
The tires must becheck ed. 314
Tir
epr essureWheels andtires

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