
fi
ed based on the actual operating conditions
and/or loads.
Examples of arduous operating conditions:
R regular city driving with frequent intermedi‐
ate stops
R mainly short-dis tance driving
R frequent operation in mountainous terrain or
on poor road sur faces
R when the engine is of ten le ftidling for long
periods
R operation in particula rly dusty conditions
and/or if air-recirculation mode is frequently
used
In these or similar operating conditions, ha vethe
interior air filter, engine air cleaner, engine oil
and oil filter etc. changed more frequent ly. The
ty re s must be checked more frequently if the
ve hicle is operated under increased loads. Fur‐
th er information can be obtained at a qualified
specialist workshop. Battery disconnection periods
The ASS
YST PLUS se rvice inter val display
can only calculate the service due da tewhen
th e bat tery is connected. #
Notedown the service due date displa yed on
th e instrument display before disconnecting
th e battery (/ page474). Engine com
partment Ac
tive bonn et(pedestrian pr otection) Operation of
the active bonnet (pedestrian
pr otection)
In cer tain accident situations, therisk of injury
to pedestrians can be reduced bythe actuation
of the active bonn et. The rear area of the bonn et
is raised byappr oximately 85 mm.
Fo rth e drive tothewo rkshop, reset the trig‐
ge red active bonn etyourself. Af terth e active
bonn ethas been triggered, pedestrian pr otection
may be limited.
A qu alified specialist workshop must re-ins tate
th e full functionality of the active bonn et. The active bonnet is not
available in all coun‐
tries.
Re setting the active bonnet &
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain components in the engine compart‐
ment can be very hot, e.g. the engine, the
ra diator and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch co mponent parts described in
th efo llowing. Maintenance and care
475

&
WARNING Risk offire and injury from
engine oil
If engine oil comes into con tact wi thhot
component parts in the engine compart‐
ment, it may ignite. #
Make sure that no engine oil is spilled
next tothefiller opening. #
Allow the engine tocool off and thor‐
oughly clean the engine oil from compo‐
nent parts before starting theve hicle. *
NO
TEEngine dama gecaused byan
incor rect oil filter, incor rect oil or addi‐
tives #
Do not use engine oils or oil filters
which do not cor respond tothe specifi‐
cations explicitly prescribed forthe
service inter vals. #
Do not alter the engine oil or oil filter in
order toachie velonger change inter vals
th an presc ribed. #
Do not use additives. #
Follow the instructions in the service
inter val display rega rding the oil
ch ange. *
NO
TEDama gecaused bytopping up too
much engine oil To
o much engine oil can damage the engine
or the catalytic con verter. #
Have excess engine oil remo ved at a
qu alified specialist workshop. #
Turn cap 1anti-clockwise and remo veit. #
Top up the engine oil. #
Replace cap 1and turn it clockwise as far
as it will go. #
Check the oil le vel again (/ page478). 480
Maintenance and care

*
NO
TEEngine dama gecaused byan
incor rect oil filter, incor rect oil or addi‐
tives #
Do not use engine oils or oil filters
which do not cor respond tothe specifi‐
cations explicitly prescribed forthe
service inter vals. #
Do not alter the engine oil or oil filter in
order toachie velonger change inter vals
th an presc ribed. #
Do not use additives. #
Have the engine oil rene we d at regular
inter vals. Mercedes-Benz
recommends that you ha vethe
oil change car ried out at a qualified specialist
wo rkshop.
Only Mercedes-Benz appr oved engine oils may
be used in Mercedes-Benz engines.
Fu rther information on engine oil and oil filters is
av ailable at thefo llowing locations:
R inthe Mercedes-Benz Specifications for
Operating Fluids byentering the designation -
at http://be vo.mercedes-benz.com
- inthe Mercedes-Benz BeVo app
R at a qualified specialist workshop
Pet rol engines: for cer tain countries, dif fere nt
engine oils can be used in conjunction wi th
re duced maintenance inter vals.
% Further information on dif fere nt engine oils
can be ob tained at a qualified specialist
wo rkshop.
Quality and capacity of engine oil
MB-F reigabe or MB-Appr oval Pe
trol engine sM B-Freigabe or MB-
Appr oval
All models 229.51,229.52,
229.6 1,229.71 MB-F
reigabe or MB-Appr oval Diesel engine
sMB-Freigabe or MB-
Appr oval
GLC 400 d 4MATIC 229.52, 229.61
All other models 228.51 , 229.31,
229.5 1,229.52,
229.6 1,229.71 %
Ifth e engine oils lis ted in theta ble are not
av ailable, you may add a maximum of
1. 0 litr e ofthefo llowing engine oils once
onl y.
Engine oils for one-time filling only in exceptional
cases:
R petrol engines:
- MB-F reigabe or MB-Appr oval 229. 31or
AC EA C3
R diesel engines:
- GLC 400 d 4MATIC: MB-Freigabe or MB-
Appr oval 229. 51orAC EA C3
- allother models: MB-Freigabe or MB-
Appr oval AC EA C3 546
Tech nical da ta

The
following values referto an oil change,
including the oil filter.
Re placement amount Mode
lR eplacement
amount
GLC 300 d 4MATIC 6.8 litres
GLC 400 d 4MATIC 8.0 litres
All other models 6.0 litresNote
s on brake fluid Obser
vethe no tes on operating fluids
(/ page 541). &
WARNING Risk of an accident due to
va pour poc kets form ing in the brake sys‐
tem
The brake fluid cons tantly absorbs moi sture
from the air. This lo wersthe boiling point of
th e brake fluid. If the boiling point is too lo w,
va pour poc kets may form inthe brake sys‐
te m when the brakes are applied hard. This impairs
the braking ef fect. #
Have the brake fluid rene we d at the
specified inter vals. Ha
ve the brake fluid regularly replaced at a
qu alified specialist workshop.
Only use brake fluid appr ovedby Mercedes-Benz
according toMB-F reigabe or MB-Appr oval 33 1.0.
Yo u can obtain fur ther information on brake fluid
in thefo llowing places:
R inthe Mercedes-Benz Specifications for
Operating Fluids
- at http://be vo.mercedes-benz.com
- inthe Mercedes-Benz BeVo App
R at a qualified specialist workshop Coolant
Note
s on coolant
Obser vethe no tes on operating fluids
(/ page 541). &
WARNING Risk offire ‑ and inju ryfrom
antifreeze
If antifreeze comes into contact with hot
component parts in the engine compart‐
ment, it may ignite. #
Allow the engine tocool down before
yo uto p up the antif reeze. #
Make sure that no antifreeze spills out
next tothefiller opening. #
Thoroughly clean the antif reeze from
component parts before starting the
ve hicle. *
NO
TEDama gecaused byincor rect cool‐
ant #
Only add coolant that has been pre‐
mixed with therequ ired antifreeze pro‐
te ction. Te
ch nical da ta547

¯
AdBlue sy stem fault Engine
st art not possible ................................ 589
¯ AdBlue sy stem fault See Own‐
er's Manual ........................................ .588
5Ad d 1 litre engine oil when next
re fuelling ............................................. 584
Apply brake todeselect Park (P)
position ...............................................5 90
Apply brake toselect R ....................... 590
éAT TENTION ASSIST inoperative ... 568
éAT TENTION ASSIS T:Take a
break! .................................................. 569
bAu tomatic driving lights inoper‐
ative .................................................... 606
Au xilia rybattery malfunction ...............591
Beginning eme rgency stop .................. 572
Blind Spot Assi stcur rently una vaila‐
ble See Owner's Manual ......................573
Blind Spot Assi stinope rative ............... 573Blind Spot Assi
stnot available when
to wing a trailer See Owner's Manual ...5 74
Cann otstart engine See Owner's
Manual ................................................ 582
ÁChan gekey bat teries ...................5 97
J Check brake fluid le vel................ 562
Check brake pads See Owner's Man‐
ual ...................................................... .563
5Che ckeng. oil le v.when next
re fuelling ............................................. 584
ï Checktrailer hitch lo ck(white
display message) .................................5 99
Che cktyre pressu resth en restart
Ru n Flat Indicator ................................ 593
hCheck tyre(s) ............................... 594
!Clean the fuel filter .................... .583
?Coolant Stop vehicle Switch
engine off ............................................ 579
Cruise cont rol and Limiter inope ra‐
tive ...................................................... 577Cruise cont
rol inope rative ................... 577
Cruise cont rol off ................................ 577
! currently una vailable See Own‐
er's Manual ........................................ .555
÷cur rently una vailable See Own‐
er's Manual ........................................ .556
5Engine oil le vel cannot be
measured ............................................ 586
5Engine oil le velRe duce oil le vel...5 85
5Engine oil le velSt op vehicle
Switch engine off ................................ 585
5Engine oil pressure Stop Switch
off engine ............................................ 586
äFa ult Drive at max. 80 km/h .......5 71
6 Front left malfunction Consult
wo rkshop (e xample)............................ 564
Fr ont-passenger airbag disabled See
Owner's Manual ..................................5 65
Fr ont-passenger airbag enabled See
Owner's Manual ..................................5 65 Index
635