2017 MERCEDES-BENZ GLC coolant level

Problem with the rear window
defroster ....................................... .1 27
Problems with cooling with air
dehumidification ............................ 125
Refrigerant ..................................... 369
Refrigerant filling capacity ............. 370
Setting the air distribution ............. 126
Setting the air vents ..................... .1 29
Setting the airflow ......................... 126
Setting the climate mode .............. .1 26
Setting the climate mode (multi-
media system) ............................... 272
Setting the temperature ................ 126
Switching air-recirculation mode
on/off ............................................ 128
Switching on/off ........................... 124
Switching the rear window
defroster on/off ............................ 127
Switching the synchronization
function on and off ........................ 126
Synchronization function (multi-
media system) ............................... 273
Climate control settings
Multimedia system ........................ 272
Climate control system
Climate control .............................. 124
Coat hooks ......................................... 287
Cockpit
Overview .......................................... 35
COLLISION PREVENTION ASSIST
PLUS
Activating/deactivating ................. 220
Display message ............................ 233
Operation/notes .............................. 67
COMAND display
Cleaning ......................................... 316
Combination switch .......................... 112
Connecting a USB device
see also Digital Operator's Man-
ual ................................................. .2 68
Consumption statistics (on-board
computer) .......................................... 213
Controller .......................................... .2 69
Controlling speed
see DISTRONIC PLUS
Convenience closing feature .............. 91
Convenience opening feature ............ 91 Coolant (engine)
Checking the level ....... .................. 309
Di spla y message ............................ 240
Filling capacity ............................... 369
Important safety notes .................. 368
Temperature display in the instru-
ment cluster .................................. 209
Warning lamp ................................. 263
Cooling
see Climate control
Copyright ............................................. 34
Cornering light function
Display message ............................ 239
Function/notes ............................ .1 13
Crosswind Assist ................................. 73
Cruise control
Cruise control lever ....................... 162
Deactivating ................................... 163
Display message ............................ 248
Driving system ............................... 162
Function/notes ............................ .1 62
General notes ................................ 162
Important safety notes .................. 162
Setting a speed .............................. 163
Storing and maintaining current
speed ............................................. 163
Storing the current speed or call-
ing up the last stored speed .......... 163
Cup holder
Center console .............................. 290
Important safety notes .................. 290
Rear compartment ......................... 290
Customer Assistance Center
(CAC) ..................................................... 31
Customer Relations Department ....... 31
D
Data
see Technical data
Data carrier
Selecting ........................................ 217
Daytime running lamps
Display message ............................ 239
Function/notes ............................ .1 11
Switching on/off (on-board com-
puter) ............................................. 2238
Index

Locking (in an emergency) ............... 84
Locking (SmartKey) .......................... 77
Lowering ........................................ 360
Maintenance .................................... 29
Operating safety .............................. 30
Operation outside the USA/
Canada ............................................ 29
Parking .......................................... 154
Parking for a long period ................ 157
Pulling away ................................... 135
Raising ........................................... 357
Reporting problems ......................... 31
Securing from rolling away ............ 357
Technical data ............................... 362
Towing away .................................. 330
Transporting .................................. 332
Unlocking (in an emergency) ........... 84
Unlocking (SmartKey) ...................... 77
Vehicle data ................................... 370
Vehicle data
Dimensions .................................... 370
Vehicle emergency locking ................ 84
Vehicle identification number
see VIN
Vehicle identification plate .............. 363
Vehicle level
AIR BODY CONTROL ...................... 173
Display message ............................ 244
Video
Operating the DVD ......................... 217
see also Digital Operator's Man-
ual .................................................. 268
VIN
Seat ............................................... 364
Type plate ...................................... 363
W
Warning and indicator lamps
ABS ................................................ 259
Air bags ......................................... 262
Brakes ........................................... 258
Coolant .......................................... 263
Distance warning ........................... 265
Engine diagnostics ......................... 263
ESP ®
.............................................. 259
ESP ®
OFF ....................................... 261
Fuel tank ........................................ 263 General notes ................................ 256
Overview .......................................... 36
Parking brake ................................ 262
PASSENGER AIR BAG ...................... 44
Reserve fuel ................................... 263
Restraint system ............................ 262
Seat belt ........................................ 256
SPORT handling mode ................... 261
Steering ......................................... 267
Tire pressure monitor .................... 266
Warranty .............................................. 28
Washer fluid
Display message ............................ 254
Weather display (COMAND)
see also Digital Operator's Man-
ual .................................................. 268
Wheel and tire combinations
Tires ............................................... 360
Wheel bolt tightening torque ........... 360
Wheel chock ...................................... 357
Wheels
Changing a wheel .......................... 356
Checking ........................................ 336
Cleaning ......................................... 314
Important safety notes .................. 336
Information on driving .................... 336
Interchanging/changing ................ 356
Mounting a new wheel ................... 359
Mounting a wheel .......................... 357
Removing a wheel .......................... 359
Snow chains .................................. 338
Storing ........................................... 357
Tightening torque ........................... 360
Wheel size/tire size ....................... 360
Window curtain air bag
Display message ............................ 236
Operation ......................................... 50
Windows
see Side windows
Windshield
Defrosting ...................................... 126
Windshield washer fluid
see Windshield washer system
Windshield washer system
Adding washer fluid ....................... 310
Important safety notes .................. 369
Windshield wipers
Problem (malfunction) ................... 12224
Index

Problem
Possible causes/consequences and P Solutions
The starter motor was exposed to a thermal load that was too high. X
Try to start the engine again ( Y
page 133).
If the engine still does not start: X
Consult a qualified specialist workshop.
Vehicles with a gasoline
engine:
The engine is not running
smoothly and is misfir-
ing. There is a malfunction in the engine electronics or in a mechanical
component of the engine management system. X
Only depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it. X
Have the cause rectified immediately at a qualified specialist work-
shop.
The coolant temperature
gauge shows a value
above 248 ‡ (120 †). The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently. X
Stop as soon as possible and allow the engine and the coolant to
cool down. X
Check the coolant level ( Y
page 309). Observe the warning notes
as you do so and add coolant if necessary.
DYNAMIC SELECT switch
Mercedes-AMG GLC 43 4MATIC
General information Select the drive program using the DYNAMIC
SELECT switch.
Available drive programs:
S+ Sport Plus Particularly sporty driving
characteristics
S Sport Sporty driving characteris-
tics
C Comfort Comfortable and economi-
cal driving characteristics
E Economy Particularly economical
driving characteristics
I Individual Individual settings
Depending on the drive program selected the
following vehicle characteristics will change: R
the engine management R
the transmission management R
the suspension R
the steering R
the availability of the ECO start/stop function R
climate control R
the driver assistance systems R
the availability of gliding mode
Further information for automatic drive program
characteristics ( Y
page 144).
Additionally, in drive program I you can config-
ure the respective vehicle characteristics using
the multimedia system. You can find informa-
tion about this in the Digital Operator's Manual.
Each time you start the engine with the Smart-
Key or the Start/Stop button, drive program C is
activated. For further information about starting
the engine, see ( Y
page 133).DYNAMIC SELECT switch 139
Driving and parking Z

When overtaking, pay particular attention to the
extended length of your vehicle/trailer combi-
nation.
Due to the length of the vehicle/trailer combi-
nation, you require additional road space when
overtaking before you can change back to the
original lane.
If the automatic transmission repeatedly shifts
between gears on uphill or downhill gradients,
shift to a lower gear.
Driving in a lower gear and at a reduced speed
decreases the risk of engine damage.
If the coolant temperature increases signifi-
cantly when climate control is switched on,
switch climate control off.
Coolant heat can also be dissipated by opening
the windows and switching the ventilation
blower and the interior temperature to the high-
est level.
Decoupling a trailer
G WARNING
If you uncouple a trailer with the overrun
brake engaged, you could trap your hand
between the vehicle and the trailer drawbar.
There is a risk of injury.
Do not uncouple a trailer if the overrun brake
is engaged.
G WARNING
Vehicles with level control:
The vehicle is lowered as soon as you discon-
nect the trailer cable. This could result in your
limbs or those of other people that are
between the vehicle body and tires or under-
neath the vehicle being trapped. There is a
risk of injury.
Make sure that nobody is in the immediate
vicinity of the wheel housings or under the
vehicle when you disconnect the trailer cable.
! Do not disconnect a trailer with an engaged
overrun brake. Otherwise, your vehicle could
be damaged by the rebounding of the overrun
brake. X
Apply the vehicle's parking brake manually. X
Shift the transmission to position ] . X
Close all doors and the tailgate. X
Switch off the engine. X
Secure the vehicle and trailer against rolling
away. X
Remove the trailer cable. X
Remove the safety chains, if there are any. X
Uncouple the trailer.
Removing the ball coupling X
Observe the manufacturer's installation
instructions. X
Press the protective cap into the ball coupling
recess. X
Make sure that the protective cap is firmly in
place.
Observe the loading guidelines ( Y
page 278)
and the safety notes regarding stowage spaces
( Y
page 278).
Information on cleaning and care of the trailer
tow hitch ( Y
page 316).
Trailer power supply
! Accessories with a maximum power con-
sumption of 180 W can be connected to the
permanent power supply.
You must not charge a trailer battery using the
power supply.
The trailer socket of your vehicle is equipped at
the factory with a permanent power supply.
The permanent power supply is supplied via
trailer socket pin 4.
The trailer's permanent power supply is
switched off in the event of low vehicle supply
voltage and after six hours at the latest.
A qualified specialist workshop can provide
more information about installing the trailer
electrics.
Permissible trailer loads and trailer
drawbar noseweights
Weight specifications
The gross trailer weight is calculated as the
weight of the trailer plus the weight of the load
and the trailer's equipment.206
Towing a trailer
Driving and parking

Tachometer
! Do not drive in the overrevving range, as this
could damage the engine.
The red band in the tachometer indicates the
engine's overrevving range.
The fuel supply is interrupted to protect the
engine when the red band is reached.
Outside temperature display You should pay special attention to road condi-
tions when temperatures are around freezing
point.
Bear in mind that the outside temperature dis-
play indicates the temperature measured and
does not record the road temperature.
The outside temperature display is in the multi-
function display ( Y
page 210).
Changes in the outside temperature are dis-
played after a short delay.
Coolant temperature gauge
G WARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
! A display message is shown if the coolant
temperature is too high.
If the coolant temperature is over 248 ‡
(120 †), do not continue driving. The engine
will otherwise be damaged.
The coolant temperature gauge is in the lower
section of the tachometer ( Y
page 36).
Under normal operating conditions and with the
specified coolant level, the coolant temperature
may rise to 248 ‡ (120 †). Operating the on-board computer
C
Multifunction display D
Right control panel

Where possible, let the engine cool down and
touch only the components described in the
following.
G WARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There
is a risk of injury.
If you need to do any work inside the engine
compartment: R
switch off the ignition R
never reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area R
remove jewelry and watches R
keep items of clothing and hair, for exam-
ple, away from moving parts
G WARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is a risk of injury.
Let the engine cool down before you open the
cap. Wear gloves and eye protection. Slowly
open the cap to relieve pressure.
G WARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department. Checking coolant level
Checking the coolant level (example) X
Park the vehicle on a level surface.
Only check the coolant level when the vehicle
is on a level surface and the engine has cooled
down. X
Turn the SmartKey to position H in the igni-
tion lock ( Y
page 132).
or X
Press the Start/Stop button twice on vehicles
with KEYLESS-GO or the KEYLESS-GO start
function ( Y
page 133). X
Check the coolant temperature display in the
instrument cluster ( Y
page 36).
The coolant temperature must be below
158 ‡ (70 †). X
Turn the SmartKey to position Z in the igni-
tion lock ( Y
page 132).
or X
Press the Start/Stop button once on vehicles
with KEYLESS-GO or the KEYLESS-GO start
function ( Y
page 133). X
Slowly turn cap C half a turn counter-clock-
wise and allow excess pressure to escape. X
Turn cap C further counter-clockwise and
remove it.
If the coolant is at the level of marker bar

Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
i Have the coolant regularly replaced at a
qualified specialist workshop and the replace-
ment confirmed in the Maintenance Booklet.
Comply with the important safety notes for ser-
vice products when handling coolant
( Y
page 364).
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the fol-
lowing tasks: R
Anti-corrosion protection R
Antifreeze protection R
Raising the boiling point
If the coolant has antifreeze protection down to
-35 ‡ (-37 †), the boiling point of the coolant
during operation is approximately 266 ‡
(130 †).
The antifreeze concentrate/corrosion inhibitor
concentration in the engine cooling system
should: R
be at least 50%. This will protect the engine
cooling system against freezing down to
approximately -35 ‡ (-37 †). R
not exceed 55% (antifreeze protection down
to -49 ‡[ -45 †]) . Otherwise , hea t will no t be
dissipated as effectively.
Mercedes-Ben z recommends an antifreeze/
corrosion inhibitor concentrat e in accordance
wit h MB Specification s fo r Servic e Products
310.1.
i Whe n th e vehicle is first delivered, it is filled
wit h a coolan t mixture that ensures adequat e
antifreez e an d anti-corrosio n protection .
i The coolan t is checke d wit h ever y mainte-
nanc e interval at a qualifie d specialis t work-
shop.
Filling capacities
Model Capacity
GLC 300 d 4MATIC
10.6 US qt (10.0 l)
Mercedes-AMG
GLC 43 4MATIC 12.2 US qt (11.5 l)
Al l ot her models
9.5 US qt (9.0 l) Windshield washer system
Important safety notes
G WARNING
Windshield washer concentrate could ignite if
it comes into contact with hot engine compo-
nents or the exhaust system. There is a risk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
! Only use washer fluid that is suitable for
plastic lamp lenses, e.g. MB SummerFit or MB
WinterFit. Unsuitable washer fluid could dam-
age the plastic lenses of the headlamps.
! Only MB SummerFit and MB WinterFit
washer fluid should be mixed together. The
spray nozzles may otherwise become
blocked.
Do not use distilled or de-ionized water. Other-
wise, the level sensor may give a false reading.
When handling washer fluid, observe the impor-
tant safety notes on service products
( Y
page 364).
At temperatures above freezing: X
Fill the washer fluid reservoir with a mixture of
water and windshield washer fluid, e.g. MB
SummerFit.
Add 1 part MB SummerFit to 100 parts water.
At temperatures below freezing: X
Fill the washer fluid reservoir with a mixture of
water and washer fluid, e.g. MB WinterFit.
For the correct mixing ratio refer to the infor-
mation on the antifreeze reservoir.
i Add windshield washer fluid, e.g. MB Sum-
merFit or MB WinterFit, to the washer fluid all
year round.
Climate control system refrigerant
Important safety notes
The climate control system of your vehicle is fil-
led with refrigerant R ‑ 134a.
The instruction label regarding the refrigerant
type used can be found on the radiator cross
member.Service products and filling capacities 369
Technical data Z