2019 MERCEDES-BENZ GLB SUV engine overheat

Display messages
Possible causes/consequences and M
MSolutions #
Have the engine cooling sy stem checked at a qualified specialist workshop.
ÿ
Coolant Stop vehicle
Switch engine off *T
he coolant is too hot. #
Stop theve hicle immediately in accordance with the traf fic conditions and switch off the engine. &
WARNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. #
Wait until the engine has cooled down. #
Make sure that the air supply tothera diator is not impaired. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C.
ÿ *T
hefan mo tor is defective. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C. 584
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions
Transmission Malfunction
Stop *
The transmission is malfunctioning. The transmission shifts toneutral iautomatically. #
Stop theve hicle immediately in accordance with the traf fic conditions. #
Depress the brake pedal. #
Enga gepark position j. #
Consult a qualified specialist workshop.
Auxiliary battery malfunc-
tion *T
he auxiliary batteryforth e transmission is no longer being charge d. #
Consult a qualified specialist workshop. #
Untilthen, alw ays select park position jmanually before you swit choff the engine. #
Before leaving theve hicle, apply the electric parking brake.
Transmission Malfunction *T
he transmission is malfunctioning. The cause could be an overheated clutch or bloc kedge ars. #
Let the transmission cool down. #
Ifth e display message still appears following a restart, consult a qualified specialist workshop.
d
Trans. oil overheated Drive
on with care *T
he transmission is overheating. When the display message is active, start-up and driving characteristics may be
te mp orarily impaired. #
Drive at low engine speeds. #
Avoid sporty driving. #
Before pulling away on uphill gradients, let the transmission cool down until the display message disappears. 588
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions #
Depress the clutch pedal again.
The engine will start automaticall y. #
Slowly release the clutch pedal topull away.
Clutch overheated Avoid
pulling away for XX:XX mins *T
he clutch is under considerable load and is overheating.
Av oid frequent pulling away and driving at walking pace over longer dis tances. #
Stop theve hicle, paying attention toroad and traf fic conditions, and le avethe engine running.
The clutch will cool more quickly when the engine is running.
or #
If possible, continue driving at a steady speed and remo veyour foot from the clutch pedal. Do not ride the
clutch.
The clutch will cool while theve hicle is in motion.
When the clutch has cooled down, the display message will disappear. 590
Display messages and warning/indicator lamps

Engine
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
ÿ Coolant warning lamp The
red coolant warning lamp is lit while the engine is running.
*Possible causes: R The temp erature sensor is malfunctioning
R Coolant le velto o low
R The air supply tothera diator is obstructed
R The radiator fan is faulty
If th ere is an additional warning tone, the coolant temp erature has exceeded 120 °C. &
WARNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. #
Stop theve hicle immediately in accordance with the traf fic conditions and switch off the engine. Do not continue
driving. #
Notethe messages on the multifunction displa y.
If th e coolant temp erature display is at the lo wer end of thete mp erature scale: 628
Display messages and warning/indicator lamps

Á
Key not de tected (white dis‐
pl ay messa ge)...................................... 571
b Left dipped beam (e xamp le) ...... .573
6 Left windowbag malfunction
Consult workshop (e xample).............. .568
b Malfunction See Owner's Man‐
ual ....................................................... 573
î Max. speed 40 km/h ................. 604
ð Maximum speed exceeded ......... 606
î Notin cur r.drive prog. ...............6 04
ç Off.............................................. 603
ë Off.............................................. 602
ï Operation only possible in
transmission position N .......................579
! Parking brake See Owner's
Manual ................................................ 591
h Rectify tyre pressure ...................61 5
Ú Refill Ad Blue See Owne r’s
Manual .................................................6 18
! Release parking brake ................ 594 ¸
Replace air cleaner .....................585
À Replace key See Owner's Man‐
ual ...................................................... .570
Á Replace key ................................ 571
æ Reser vefuel le vel...................... .585
6 Restra int sys. malfunction Con‐
sult workshop ...................................... 567
# See Owner's Manual ...................612
Ù Steering malfunction Incre ased
ph ysical ef fort See Owner's Manual ....579
Ù Steering malfunction See Own‐
er's Manual ......................................... 580
Ù Steering malfunction Stop
immediately See Owner's Manual .......579
# Stop vehicle Lea veengine run‐
ning ...................................................... 61 3
# Stop vehicle See Owner's Man‐
ual ........................................................ 612
ç suspended ................................. 603
b Switch off lights .......................... 574b
Switch on headlamps .................574
Ú Top up AdBlue Emergency op.
in XXX miles See Owner's Manual .......61 8
+ Top up coolant See Owner ’s
Manual ................................................ 583
¥ Top up washer fluid .................... 583
d Trans. oil overheated Drive on
with care ............................................. 588
! Turn on the ignition torelease
th e parking brake ................................ 594
Ú ................................................... 61 9
d Vehicle is operational Switch
off ignition before exiting .................... .577
h Warning tyre defect ....................61 5
h Wheel sensor(s) missing .............614
Ú XX,X l Top up AdBlue Switch on
ignition, wait 60 sec. or eng. start
not poss. .............................................. 61 9
Ac tive Blind Spot Assi stcur rently
una vailable See Owner's Manual .........599 650
Index

Ac
tive Blind Spot Assi stinope rative .... 600
Ac tive Blind Spot Assi stnot available
when towing a trailer See Owner's
Manual ................................................ 600
Ac tive bonnet malfunction See Own‐
er's Manual .......................................... 581
Ac tive Brake Assi stFunctions cur‐
re ntly limited See Owner's Manual ......61 0
Ac tive Brake Assi stFunctions limited
See Owner's Manual ............................61 0
Ac tive Dis tance Assi stavailable
again .................................................. .604
Ac tive Dis tance Assi stcur rently
una vailable See Owner's Manual .........603
Ac tive Dis tance Assi stinope rative ...... 603
Ac tive Lane Keeping Assist cur rently
una vailable See Owner's Manual .........598
Ac tive Lane Keeping Assist inopera‐
tive ...................................................... 598 Ac
tive Parking Assist and
PA RKTRONIC inoperati veSee Own‐
er's Manual ......................................... 600
Ac tive Steering Assist cur rently
una vailable due tomultiple emer‐
ge ncy stops ......................................... 598
Ac tive Steering Assist cur rently
una vailable See Owner's Manual .........597
Ac tive Steering Assist inoperative .......597
Ad aptive Highbeam Assist cur rently
una vailable See Owner's Manual .........575
Ad aptive Highbeam Assist inopera‐
tive ...................................................... 575
Ad aptive Highbeam Assist Plus cur‐
re ntly una vailable See Owner's Man‐
ual ...................................................... .575
Ad aptive Highbeam Assist Plus inop‐
erative ................................................ .575
Anti-theft alarm sy stem Malfunction ... 582Apply brake
todeselect Park (P)
position ...............................................5 86
Apply brake toselect R ........................ 587
Au xilia rybattery malfunction .............. 588
Beginning emer gency stop .................. 597
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ...................... 599
Blind Spot Assist inope rative ............... 599
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...5 99
Che cktyre pressu resth en restart
Ru n Flat Indicator ................................. 617
Clutch overheated Avoid pulling away
fo r XX:XX mins ................................... .590
Cruise control and Limi ter inopera‐
tive ..................................................... .605
Cruise control inope rative ................... 605
Cruise control off ................................ 605
Dep ress clutch fully tostart engine .....5 89 Index
651