
Front-passenger front airbag deac-
tivation
Display message ............................ 349
Front-passenger front airbag deac-
tivation system
Operation ........................................ .57
Problems ......................................... 61
System self-test ...............................59
Fuel
Additives ........................................ 483
Consumption information .............. 484
Consumption statistics .................. 319
Displaying the current consump-
tion ................................................ 318
Displaying the range ...................... 318
Driving tips .................................... 222
E10 ................................................ 482
Fuel gauge ...................................... .34
Grade (petrol) ................................ 482
Important safety notes .................. 481
Low outside temperatures ............ .483
Problem (malfunction) ................... 206
Quality (diesel )............................... 483
Refuelling ....................................... 203
Tank content/reserve fue l............. 482
Fuel filler flap
Opening ......................................... 205
Fuel filter (white display message) .. 356
Fuel level
Calling up the range (on-board
computer) ...................................... 318
Gaug e.............................................. 34
Fuel tank
Capacity ........................................ 482
Problem (malfunction) ................... 206
Fuses
Allocation chart ............................. 451
Before changing ............................. 449
Dashboard fuse box ....................... 449
Fuse box in the engine compart-
ment .............................................. 450
Fuse box in the front-passenger
footwell .......................................... 449
Fuse box in the luggage compart-
ment .............................................. 451
Important safety notes .................. 448 G
Gearshift paddles see Steering wheel gearshift paddles
Genuine Mercedes-Benz parts ........... 25
Glove compartment .......................... 391 H
HANDS-FREE ACCESS ....................... 106
Hazard warning lamps ...................... 141
Head restraint
General notes ................................ 124
Head restraints
Adjusting (electrically) ................... 124
Adjusting (manually) ...................... 124
Adjusting (rear) .............................. 125
Adjusting the fore-and-aft posi-
tion manually ................................. 124
Fitting/removing (rear) .................. 125
Important safety notes .................. 123
Head-up display
Adjusting the brightness ................ 331
Displays and operating .................. 316
Function/note s............................. 315
Important safety notes .................. 316
Selecting displays .......................... 330
Setting the position ....................... 331
Storing settings (memory func-
tion) ............................................... 135
Headlamp
Cleaning system (notes) ................ 487
Headlamp flasher .............................. 141
Headlamps
Misting up ...................................... 144
see Automatic headlamp mode
Heating
see Climate control
High-pressure cleaners .................... 422
High-voltage battery
Battery car e................................... 212
Charging (charging station) ............ 217
Charging (mains socket) ................ 213
Charging (wallbox) ......................... 216
Charging cable heating up ............. 212
Energy consumption ...................... 212
General notes .................................. 45
Method of operation ...................... 211 12
Index

vapours. Keep fuels out of the reach of chil-
dren.
If you or others come into contact with fuel,
observe the following:
R Wash the fuel off any affected areas of skin
with water and soap immediately.
R If you get fuel in your eyes, rinse them thor-
oughly with clean water immediately. Seek
immediate medical attention.
R If fuel is swallowed, seek immediate medi-
cal attention. Do not induce vomiting.
R Change any clothing that has come into
contact with fuel immediately. G
WARNING
Electrostatic charge can cause sparks and
thereby ignite fuel vapours. There is a risk of
fire and explosion.
Always touch the vehicle body before opening the fuel filler flap or touching the fuel pump
nozzle. This discharges any electrostatic
charge that may have built up.
Do not get into the vehicle again during the
refuelling process. Otherwise, electrostatic
charge could build up again. G
WARNING
Vehicles with a diesel engine:
If you mix diesel fuel with petrol, the flash
point of this fuel mixture is lower than that of pure diesel fuel. When the engine is running,
components in the exhaust system may over-
heat unnoticed. There is a risk of fire.
Never refuel with petrol. Never add petrol to
diesel fuel.
! Do not use diesel to refuel vehicles with a
petrol engine. Do not switch on the ignition if you accidentally refuel with the wrong
fuel. Otherwise, the fuel will enter the fuel
system. Even small amounts of the wrong
fuel can result in damage to the fuel system
and the engine. Notify a qualified specialist
workshop and have the fuel tank and fuel
lines drained completely. !
Do not use petrol to refuel vehicles with a
diesel engine. Do not switch on the ignition if you accidentally refuel with the wrong
fuel. Otherwise, fuel can enter the fuel sys-tem. Even small amounts of the wrong fuel
could result in damage to the fuel system
and the engine. The repair costs are high.
Notify a qualified specialist workshop and
have the fuel tank and fuel lines drained
completely.
! Overfilling the fuel tank could damage the
fuel system.
! Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
! Use a filter when adding fuel from a fuel
can. The fuel lines and/or the fuel injection
system could otherwise be blocked by par- ticles from the fuel can.
If you overfill the fuel tank, some fuel may
spray out when you remove the fuel pump
nozzle.
Further information on fuel and fuel quality
(Y page 480). Refuelling
General notes Observe the important safety notes
(Y
page 203).
If you unlock/lock the vehicle from the out-
side, the fuel filler flap also unlocks/locks.
The position of the 8fuel filler cap is dis-
played in the instrument cluster. The arrow
next to the filling pump indicates the side of
the vehicle. 204
RefuellingDriving and parking

Display messages
Possible causes/consequences and
M
MSolutions 8
Reserve fuel level Reserve fuel level The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel level
drops into the reserve range.
X Refuel at the nearest filling station. C C There is very little fuel in the fuel tank.
The auxiliary heating cannot be operated.
X Refuel at the nearest filling station without fail. ¸
Replace Replace
air
aircleaner
cleaner Vehicles with a diesel engine: the engine air filter is dirty and must
be replaced.
X Consult a qualified specialist workshop. !
Clean Clean
the
thefuel
fuel fil‐
fil‐
ter
ter Vehicles with a diesel engine: there is water in the fuel filter. The
water must be drained off.
X Consult a qualified specialist workshop. Refill AdBlue See Refill AdBlue See
Owner’s Manual Owner’s Manual
The AdBlue
®
level has fallen below the reserve range. A warning
tone also sounds.
X Refill AdBlue ®
as soon as possible (Y page 207).Refill AdBlue No
Refill AdBlue No
start in ... mi start in ... mi
The AdBlue
®
level is only sufficient for the indicated distance. A
warning tone also sounds.
X Refill AdBlue ®
immediately (Y page 207).
i If you drive the vehicle faster than 15 km/h the
Refill
Refill
AdBlue
AdBlue No
Nostart
start in
in...
... mi
mimessage goes out after approx-
imately one minute. Refill
Refill
AdBlue
AdBlueEng.
Eng.
start not possible
start not possible The AdBlue
®
tank is empty. A warning tone also sounds. You can
no longer start the engine.
X Add at least 3.5 l of AdBlue ®
(Y page 207).
X Turn the ignition on for approximately one minute.
The system requires approximately one minute after refilling to
detect the change in the AdBlue ®
level.
X Start the engine. Check AdBlue See
Check AdBlue See
Owner’s Manual Owner’s Manual
The AdBlue
®
system is malfunctioning. A warning tone also
sounds.
X Consult a qualified specialist workshop. 356
Display
messagesOn-board computer and displays

i
If the engine oils listed in the table are not
available, you may add the following engine
oils until the next oil change:
R Petrol engines: MB-Freigabe or MB-
Approval 229.1, 229.3 or ACEA A3
R Diesel engines: MB-Freigabe or MB-
Approval 229.1, 229.3, 229.5 or
ACEA C3
This must only be added once and the
amount must not be greater than 1.0 l.
Ca pacities The following values refer to an oil change,
including the oil filter.
Model Replacement
amount GLC 250 4MATIC
GLC 300 4MATIC
GLC 350 e 4MATIC 6.5 l
All other models
6.0 l
Additives
!
Do not use any additives with the engine
oil. This could damage the engine.
Engine oil viscosity Viscosity describes the flow characteristics
of a fluid. If an engine oil has a high viscosity
rating, it flows slowly; the lower the viscosity,
the faster it flows.
Engine oil selection is based on the respective outside temperatures and in accordance with the SAE classification (viscosity). The table
shows you which SAE classifications are to be
used. The low-temperature properties of
engine oils can be significantly impaired dur-
ing operation due to, for example, ageing or
soot and fuel accretion. It is therefore
strongly recommended to observe regular oil changes using an approved engine oil with the
appropriate SAE classification. Brake fluid
G
WARNING
The brake fluid continuously absorbs mois-
ture from the air. This results in the boiling
point of the brake fluid lowering. If the boiling
point of the brake fluid is too low, vapour
pockets may form when the brakes are sub-
jected to a heavy load. This would impair brak- ing efficiency. There is a risk of an accident.
Have the brake fluid renewed at the prescri-
bed intervals.
When handling brake fluid, observe the
important safety notes on service products
(Y page 480).
The brake fluid change intervals can be found in the Service Booklet.
Only use brake fluid approved by Mercedes-
Benz in accordance with MB-Freigabe or MB-Approval 331.0.
Information about approved brake fluid can
be obtained at any qualified specialist work-
shop or on the Internet at
http://bevo.mercedes-benz.com.
i Have the brake fluid regularly replaced at
a qualified specialist workshop in accord-
ance with the replacement intervals and
the replacement confirmed in the Service
Booklet. 486
Service products and capacitiesTechnical data