2021 MERCEDES-BENZ GLC SUV battery

Ve
hicle Display messages
Possible causes/consequences and M MSolutions
d Vehicle is operational
Switch off ignition before
exiting *Y
ou are leaving theve hicle in a ready-to-drive state. #
When you lea vetheve hicle, switch off the ignition, secure theve hicle against rolling away and take theke y with
yo u. #
Ifyo u do not lea vetheve hicle, switch off the electrical consumers, e.g. the seat heating. Otherwise, the12 ‑V
battery may discharge and starting the engine may be possible only with the help of a second battery (jump
st art).
ï
Operation only possible in
transmission position P *
The ball neck will not swivel because transmission position h,kor neut rali is selec ted. #
Depress the brake pedal. #
Enga gepark position j.
ï
Trailer coupling in motion *T
he ball neck is retracting/extending.
Do not attem pttospeed up, slow down or initiate the swivel mo vement using your hand, foot or other aids. During
th e swivel mo vement, do not couple a trailer.
When the ball neck has reached an operational position, the display message will disappear. Display messages and
warning/indicator lamps 381

Display messages
Possible causes/consequences and M MSolutions
Auxiliary battery malfunc-
tion (white display mes‐
sage) *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.
Auxiliary battery malfunc-
tion (red display message) *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. Brakes
Display messages
Possible causes/consequences and M MSolutions
! Parking brake See Owner's
Manual *
The yellow ! indicator lamp is lit. The elect ric pa rking brake is malfunctioning.
To appl y: #
Switch the ignition off and switch it back on. #
Apply the electric parking brake manually (/ page182).
If it is not possible toapply the electric parking brake: #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 391

Mercedes me connect
Display messages
Possible causes/consequences and M MSolutions
Mercedes me connect
Services limited See Own-
er's Manual *T
hevehicle functions forfa ult de tection are restricted.
At least one of the main functions of the Mercedes me connect sy stem is malfunctioning. #
Obser vethe no tes on the diagnostics connection (/ page 30). #
Consult a qualified specialist workshop.
G Inoperative *A
t least one of the main functions of the Mercedes me connect sy stem or of the Mercedes-Benz emer gency call
sy stem is malfunctioning. #
Consult a qualified specialist workshop. Battery
Display messages
Possible causes/consequences and M MSolutions
# 12 V battery See Owner's
Manual *T
he engine is off and thech arge leve l is too lo w. #
Switch off electrical consumers that are not required.
To charge the12 V battery: #
Lea vethe engine running for a few minutes, or drive an extended di stance. 412
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and M MSolutions
*I fth e message appears while the engine is running, this indicates an on-board elect rical sy stem malfunction. #
Consult a qualified specialist workshop.
# See Owner's Manual *T
he12 V battery is not being charge d.
* NO
TEPossible engine damage if you continue driving #
Do not continue driving under any circum stances. #
Consult a qualified specialist workshop. #
Stop theve hicle immediately in accordance with the traf fic conditions and switch off the engine. #
Consult a qualified specialist workshop.
# Stop vehicle See Owner's
Manual *T
he12 V battery is no longer being charge d and thech arge leve l is too lo w.
* NO
TEPossible engine damage if you continue driving #
Do not continue driving under any circum stances. #
Consult a qualified specialist workshop. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Switch off the engine. #
Consult a qualified specialist workshop. Display messages and
warning/indicator lamps 413

Display messages
Possible causes/consequences and M MSolutions
# Stop vehicle Leave engine
running *T
he12 V battery charge leve l is too lo w. #
Stop theve hicle immediately in accordance with the traf fic conditions. Do not continue driving. #
Lea vethe engine running. #
Ifth e display message disappears: drive on. #
Ifth e display message does not disappear: consult a qualified specialist workshop.
Û 48 V battery See Owner's
Manual *T
he 48 V on-board electrical sy stem has function restrictions. Comfort functions may be restricted. #
Consult a qualified specialist workshop immediatel y.
Ý
Please wait 48 V battery
charging *T
he 48 V battery is dischar ged. You ha veswitched on the ignition while the12 V battery was being charge d with a
suitable charge r or while ano ther vehicle was pr oviding starting assis tance.
The discha rged 48 V battery is charge d automatically via thevo ltage con verter. Af ter a few minutes, theMotor can
be started again display message will be shown on the multifunction displa y. #
Start theve hicle. #
Drive theve hicle for a while tocharge the12 V battery and the 48 V battery af ter disconnecting thech arger
from theve hicle.
If th eMotor can be started again display message does not appear af ter a few minutes: 414
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and M MSolutions #
Tryto start theve hicle. #
Ifth eve hicle does not start, consult a qualified specialist workshop.
Cannot start engine See
Owner's Manual *T
hestate of charge ofthe 48 V battery is too lo w.You can no lon gerst art theve hicle. #
Switch off electrical consumers that are not required. #
Connect a suitable charge r appro vedfo r Mercedes-Benz with suf ficient charge output tothe jump-s tart connec‐
tion point of the12 V battery (/ page 325).
The 48 V battery is charge d via thevo ltage con verter in theve hicle.
Motor can be started again *T
he 48 V battery has been charge d automatically via thevo ltage con verter. #
Start theve hicle and drive for a while tocharge the12 V battery and the 48 V batter y. Ty
re pressure moni tor Display messages
Possible causes/consequences and M MSolutions
Tyre press. monitor cur-
rently unavailable *T
here is inter fere nce from a po werful radio signal source. As a result, no signals from the tyre pressure sensors are
being recei ved. The tyre pressure monitoring sy stem is temp orarily una vailable.
The tyre pressure monitoring sy stem will restart automatically as soon as the cause has been rectified. #
Drive on.
Tyre press. monitor inoper-
ative *T
he tyre pressure monitoring sy stem is malfunctioning. Display messages and
warning/indicator lamps 415

1,
2, 3 ...
4MATIC Function................................................. 171
12 V battery
see Battery (vehicle)
12 V so cket
see Soc ket (12 V)
48 V on-board electrical sy stem
see EQ Boo sttech nology
230 V so cket
see Soc ket (230 V)
360° Camera Care...................................................... 309
Fu nction................................................ 224
Opening the camera co ver (r eve rsing
camera)................................................. 228
Selecting a view................................... .227
Switching au tomatic operation
on/off (r eversing camera).................... .228 A
A/C function Activating/deactivating (control
panel).................................................... 14 3
Ac tivating/deactivating (MBUX mul‐
timedia sy stem).....................................1 43
ABS (Anti-lo ckBraking Sy stem) .............. .186
Ac celeration
see Kickdown
Ac cident and Breakdown Manage‐
ment
Mercedes me connect........................... 277
Ac oustic locking verification signal
Ac tivating/deactivating........................... 74
Ac tive Blind Spot Assi st
Brake application................................... 214
Fu nction................................................. 213
Sy stem limitations................................. 213
Tr ailer operation.................................... .214
Ac tive bonn et(pedestrian pr otection)
Operation............................................. .298
Ac tive Brake Assi st
Fu nction/no tes..................................... 206 Setting...................................................
210
Ac tive Di stance Assist DISTRO NIC
Ac tive Emergency Stop Assis t............... 205
Calling up a speed................................. 19 9
Fu nction................................................ 19 6
Increasing/decreasing speed................ 19 9
Ro ute-based speed adap tatio n.............. 201
Selecting............................................... 19 9
St oring a speed.....................................1 99
Switching off/deactivating.................... 19 9
Switching on/activating........................ 19 9
Sy stem limitations................................. 19 6
Ac tive Eme rgency Stop Assist ................ .205
Ac tive headlamps...................................... 13 0
Ac tive Lane Keeping Assist
Ac tivating/deactivating......................... 217
Ac tivating/deactivating thewa rning...... 217
Fu nction................................................. 215
Sy stem limits.........................................2 15
Tr ailer operation.................................... .215
Ac tive Parking Assist
Exiting a parking space......................... 235
Fu nction................................................ 232
Pa rking................................................. .234 440
Index

Air-water duct
Keeping free.......................................... 305
Airbag Activation................................................ 39
Fr ont airbag (driver, front passenger)...... 44
Ins tallation locations.............................. .44
Knee airbag............................................ .44
Overview................................................. 44
PA SSENGER AIR BAG indicator lamp....... 49
Pr otection................................................ 46
Re duced pr otection.................................47
Side airba g.............................................. 44
Wi ndow airba g......................................... 44
Airflow Setting................................................... 14 2
Alarm sy stem
see ATA (anti-theft alarm sy stem)
All-wheel drive see 4MATIC
Ambient lighting Setting (MBUX multimedia sy stem)....... 13 5
Android Auto
see Smartphone integration Animals
Pets in theve hicle................................... 72
Anti-lock braking sy stem
see ABS (Anti-lock Braking Sy stem)
Anti-skid chains
see Snow chains
Anti-theft pr otection
Ad ditional door loc k................................ .76
Immobiliser............................................. 93
Anti-theft pr otection
see ATA (anti-theft alarm sy stem)
Anticipatory occupant pr otection
see PRE- SAFE®
(anticipatory occu‐
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Apple CarPlay ®
see Smartphone integration
Assistance sy stems
see Driving saf ety sy stem
ASS YST PLUS
Battery disconnection pe riods.............. 298
Displaying the service due dat e............. 297 Fu
nction/no tes..................................... 297
Re gular maintenance work.................... 297
Special service requ irements................ 297
ATA (anti-theft ala rmsystem)
Deactivating the alarm............................ 94
Fu nction.................................................. 93
Fu nction of interior pr otection................. 94
Priming/deactivating interior pr otec‐
tion..........................................................95
Priming/deactivating tow- aw ay pro‐
te ction..................................................... 94
To w- aw ay protection function.................. 94
AT TENTION ASSI ST
Fu nction................................................. 191
Setting................................................... 19 3
Sy stem limitations................................. 191
At tention assistant
see ATTENTION ASSIST
Au thorised workshop
see Qualified specialist workshop
Au tomatic distance control
see Active Dis tance Assi stDISTRONIC
Au tomatic driving lights........................... 12 8442
Index