2021 MERCEDES-BENZ GLB SUV check engine light

R
Frequent operation in mountainous terrain or
on poor road sur faces
R When the engine is oTen leT idling for long
periods
R Operation in particular lydusty conditions
and/or if air-recirculation mode is frequently
used
In these or similar operating conditions, ha vethe
interior air /lter, air /lter, engine oil and oil /lter,
fo rex ample, changed more frequentl y.The tyres
must be checked more frequently if theve hicle is
operated under increased loads. Further informa-
tion can be obtained at a quali/ed specialist work-
shop. Batt Batt
er
ery disconnection per
y disconnection per iods
iodsThe AS
SYST PLUS service inter val display can cal-
culate the service due date only when the battery
is connected. #
Display and no tedown the service due date
on the inst rument display before disconnect-
ing the battery (/ page 312). Engine com
Engine com
par
partment
tment A
A
ctiv
ctiv e bonne
e bonne t (pedes
t (pedestr trian pr ot
ian pr otection)
ection) Oper
Oper
ation of t
ation of t he activ
he active bonne
e bonne t (pedes
t (pedestr trian pr ot
ian pr otec-
ec-
tion)
tion)
In cer tain accident situations, the actuation of the
active bonnet reduces therisk of injury topedes-
trians. The rear area of the bonnet is raised by
appr oximately 70 mm.
Fo rth e drive tothewo rkshop, reset the actuated
active bonnet yourself (/ page 313).
ATer the active bonnet has been actuated, pedes-
trian pr otection may be limited.
Ha ve the full functionality of the active bonnet
re stored in a quali/ed specialist workshop.
R
R ese ese tting t
tting t he activ
he activ e bonnet
e bonnet &
W
WARNING
ARNING Risk of burns from hot compo-
nent parts in the engine compartment
Cer tain component parts in the engine com-
partment can be very hot, e.g. the engine, the
cooler and parts of theex haust system. #
Allow the engine tocool down and only
to uch component parts described in the
fo llowing. #
With your hand 0at, push down active bonnet
1 inthe area around the hinges on bo th
sides (ar rows ).
In doing so, the actuator is depressurised and
yo u may hear a hissing sound.
The engine bonnet must engage in position. #
Ifth e active bonnet can be raised slightly at
th ere ar in the area of the hinges, repeat the
step until it engages co rrectl y. Maintenance and ca
re
313
313

#
Ifth e bonnet can still be liTed slightl y,open
th e bonnet again and close it with a little force
until it engages cor rectl y. Engine oil
Engine oil
Chec
Chec
king t
king t he engine oil lev
he engine oil lev el using t
el using the on-board
he on-board
com
com put
puter
er
R
R eq
eq uir
uir ements:
ements:
R The engine has been warmed up.
R The vehicle is par ked on a le vel sur face.
R The engine is running at idle speed.
R The bonnet is closed.
The engine oil le vel is de term ined during driving.
De term ining the engine oil le vel can take up to
30 minutes with a normal driving style and even
longer with an active driving style. On-board computer:
4 Service 5
Engine oil level
One of thefo llowing message s will appear onthe
inst rument displa y:
R Engine oil level Measuring now: measu rement
of the oil le vel is not yet possible. #
Repeat there qu est aTer a maximum of
30 minutes' driving.
R Engine oil level OK andthe bar display for
indicating the oil le vel on the inst rument dis-
play is green and is between "min" and "max":
th e oil le vel is cor rect.
R Engine oil level Add 1,0 l andthe bar display
fo r indicating the oil le vel on the inst rument
display is orange and is below "min": #
Add 1 l of engine oil.
R Reduce engine oil level andthe bar display for
indicating the oil le vel on the inst rument dis-
play is orange and is abo ve"max": #
Drain o. any excess engine oil that has been
added. Todo so, consult a quali/ed specialist
wo rkshop.
R For engine oil level turn on ignition #
Switch on theve hicle tocheck the engine oil
le ve l.
R Engine oil level System inoperative: The oil
leve l sensor is defective or not connected. #
Consult a quali/ed specialist workshop.
R Engine oil level System currently unavail. #
Close the bonnet.
T T opping up engine oil
opping up engine oil &
W
WARNING
ARNING Risk of burns from hot compo-
nent parts in the engine compartment
Cer tain component parts in the engine com-
partment can be very hot, e.g. the engine, the
cooler and parts of theex haust system. #
Allow the engine tocool down and only
to uch component parts described in the
fo llowing. 316
316
Maintenance and care

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
;
Engine diagnosis warning
lamp *T
he yellow engine diagnostics warning lamp is lit while the engine is running.
A malfunction has occur red in the engine, theex haust system or the fuel system.
The emissions limit value may ha vebeen exceeded and the engine may be running in eme rgency operation mode. #
Have theve hicle checked as soon as possible at a quali/ed specialist workshop.
V
V ehicles wit
ehicles wit h a diesel engine:
h a diesel engine: the fuel tank may ha vebeen run dr y. #
Start the engine thre eto four times aTer refuelling.
If th eye llow engine diagnosis warning lamp goes out, emer gency ope ration mode is cancelled. The vehicle need not
be checked.
# Electrical fault warning lamp *T
hered electrical fault warning lamp is lit.
There is a fault in the electrics. #
Notethe messages on the instrument displa y.
æ
Fu elreser vewarning lamp
lights up *T
he yellow fuel reser vewarning lamp lights up while the engine is running.
The fuel supply has dropped into there ser verange. #
Refuel. 448
448
Display messages and
warning/indicator lamps

Det
Det
ecting inatt
ecting inatt entiv
entiveness
eness
see ATTENTION ASSIST
Diagnos
Diagnostics connection tics connection.................................. 35
Diesel
Diesel
Low outside temp eratures...................... 375
No tes..................................................... 375
Digit
Digit al Owner's Manual
al Owner's Manual.................................. 20
Dingh
Dingh yto
y to wing
wing
see Tow- bar system
Dipped beam
Dipped beam
Changing bulbs...................................... 153
DIRECT SELECT lev
DIRECT SELECT lev er
er
Engageing reve rsege ar.......................... 183
Engaging drive position.......................... 183
Engaging neutral.................................... 183
Engaging park position automaticall y...... 183
Fu nction................................................ 182
Selecting park position........................... 183
Displa
Displa y (car
y (care)
e)............................................... 325
Displa
Displa y (MBUX multimedia syst
y (MBUX multimedia syst em)
em)
Home sc reen......................................... 266
Operating.............................................. 267 Displa
Displa y (on-boar
y (on-boar d com
d com put
puter)
er)
Displa yson the inst rument displa y......... 262
Displa
Displa y in t
y in t he windscr
he windscr een
een
see Head-up display
Displa
Displa y message
y message
Calling up (on-board computer).............. 385
No tes..................................................... 385
Displa
Displa y messag
y messag es es
ç - - - km/h.................................... .415
È - - - km/h..................................... 414
h - - - km/h..................................... 414
_ 2nd seat row, leT Not loc ked......... 400
_ 2nd seat row, right Not loc ked...... 401
# 12 V battery See Owner's Man-
ual......................................................... 430
: Active Light System inoperative..... 392
¯ AdBlue system fault Emer. op.:
max. XXX km/h Start not poss. in
XXX km.................................................. 439
¯ AdBlue system fault Emer gency
op. in XXX miles See Owner's Manual.... 438 ¯
AdBlue system fault Engine
start not possible................................... 439
¯ AdBlue system fault See Own-
er's Manual............................................ 438
5 Add 1 litre engine oil when next
re fuelling ............................................... 440
é ATTENTION ASSIST inoperati ve..... 413
é ATTENTION ASSIS T:Take a
break!.................................................... 413
: Automatic driving lights inoper-
ative...................................................... 391
û Before starting the engine, turn
th e steering wheel.................................. 399
Á Change key batteries .................... 389
J Check brake 0uid le vel.................. 412
ï Check trailer hitch lock (white
display message) .................................... 396
h Check tyre(s) ................................ 433
! Clean the fuel /lter....................... 404 Index
463 463

Speed limit (winter ty
res) XXX km/h .......417
Speed Limit Assist cur rently una vaila-
ble See Owner's Manual........................ 416
Speed Limit Assist inoperative................ 416
Te aching in transmission comple te......... 408
Te aching in transmission Operate
selector le ver Brake for XX seconds
Risk of vehicle rolling ............................. 407
To shiT out of P or N,depress brake
and start engine.................................... .405
To switch o. the engine, press the
St art/ Stop button for at least 3 sec-
onds or 3 times......................................4 02
Tr a1c Sign Assist cur rently una vaila-
ble See Owner's Manual........................ 419
Tr a1c Sign Assist inoperative................. 419
Tr ansmission Malfunction ....................... 407
Tr ansmission Malfunction Stop............... 406
Tr ansmission Malfunction Visit work-
shop ...................................................... 408 Ty
re press. monitor cur rently una vaila-
ble......................................................... 432
Ty re press. monitor inoperative .............. 432
Ty re press. monitor inoperative No
wheel sensors ........................................ 433
Ty re pressure Check tyres ...................... 435
Ty re(s) ove rheated .................................. 435
Wi per malfunctioning .............................401
Wi thout changing gear, consult work-
shop ...................................................... 406
Dist
Dist ance contr ance contr ol
ol
see Active Distance Assist DISTRONIC
DIS
DIS TR
TRONIC
ONIC
see Active Distance Assist DISTRONIC
Door
Door Additional door loc k................................. 82
Child saf ety lock (rear door )..................... 76
Locking/unlocking (emer gency key)........ .85
Opening (from inside)............................... 83
Unlocking (from inside)............................ 83
Door contr
Door contr ol panel
ol panel ........................................ .16Do
Do
wnhill dr
wnhill dr iving assist
iving assist ance
ance
see DSR
Dra
Dra wbar
wbar
see Tow- bar system
Dr
Dr iv
ive Awa
e Away Assi st
y Assi st........................................ .250
Dr
Dr iv
ive position
e position
Engaging................................................ 183
Dr
Dr iv
ive pr
e pr ogr
ogram display
am display .................................. 180
Dr
Dr iv
ive pr
e pr ogr
ograms
ams
see DYNAMIC SELECT
Dr
Dr iv
iver's seat
er's seat
see Seat
Dr
Dr iving abr
iving abr oad
oad
Light adjustment (l owbeam).................. 142
Dr
Dr iving safe
iving safe ty syst
ty system
em
ABS (Anti-lock Braking System)............. .201
Ac tive Brake Assist................................. 222
Ad aptive brake lights.............................. 206
BAS (Brake Assist System).................... .201
Cameras................................................1 99
EBD (Electronic Brake forc e Distribu-
tion).......................................................2 04
ESP ®
Crosswind Assist.......................... 203 Index
467
467

Electr
Electr
ic par
ic parking br
king br ake
ake
Applying automaticall y........................... 196
Applying/releasing manually.................. 197
Emer gency braking................................ 197
Re leasing automaticall y.......................... 196
Electr
Electr ical fuses
ical fuses
see Fuses
Electr Electr omagne omagne tic com
tic compatibility
patibility
Declaration of conformity........................ .26
Electr
Electr onicSt
onic Stability Pr
ability Pr ogr
ogram
am
see ESP ®
(Elect ronic Stability Prog ram)
Emerg
Emerg ency
ency
Assis tance overview................................. 18
Fire extinguisher.................................... 329
Fi rs t-aid kit (soT sided).......................... 329
Re moving thewa rning triangle............... 328
Saf etyve st............................................. 328
Setting up thewa rning triangle............... 329
Emerg
Emerg ency br
ency br aking
aking...................................... 197
Emerg
Emerg ency br
ency br aking
aking
see BAS (Brake Assist System)
Emerg
Emerg ency call
ency call
see Me rcedes-Benz emer gency call system Eme
rg
Emerg encykey
ency key
Inserting/ removing.................................. 81
Locking/unlocking the doors................... 85
Unlocking theta ilgat e.............................. 92
Emerg
Emerg ency oper
ency oper ation mode
ation mode
St arting theve hicle............................... .168
Emerg
Emerg ency spar
ency spar e wheel
e wheel
In0ating................................................. 365
No tes..................................................... 364
Engine
Engine Engine number....................................... 371
Starting (emer gency ope ration mode ).... 168
St arting (Remo teOnline)........................ 170
Engine data
Engine data
Displaying.............................................. 181
Engine electr Engine electr onics
onics
No tes..................................................... 368
Engine number
Engine number ............................................. 371
Engine oil
Engine oil Additives................................................ 378
Capacity................................................ 378
Checking the oil le vel using the on-
board computer..................................... 316
MB-F reigabe or MB-Appr oval.................. 378 Quality................................................... 378
To
pping up............................................ .316
ERA
ERA -GL -GLON
ONASS t ASS t es
est modet mode
St arting/ending.................................... .304
Err
Err or message
or message
see Display message
ESC (Electr
ESC (Electr onicSt
onic Stability Contr
ability Contr ol)
ol)
see ESP ®
(Elect ronic Stability Prog ram)
ESP
ESP ®
®
Crosswind Assis t.................................... 203
Tr ailer stabilisatio n................................. 203
ESP
ESP ®
®
(Electr
(Electronic St
onic Stability Pr
ability Pr ogr
ogram)
am)
Ac tivating/deactivating.......................... 204
Fu nction/no tes...................................... 202
EU type appr ov
EU type appr oval number
al number ............................. 371
Ext
Ext er
erior lighting
ior lighting
Care..................................................... .324
Ext
Ext er
erior lighting
ior lighting
see Lights F
F
F
F atigue det
atigue det ection
ection
see ATTENTION ASSIST Ind
ex
469
469