2021 MERCEDES-BENZ GLC COUPE maintenance

R
TV
R Vehicle functions St
arting LING UATRONIC #
Press rocker switch 1up.
or #
Say "Hello Mercedes". Overview of
the MBUX Interior Assistant &
WARNING Risk of injury fromthe cam‐
era's laser radiation
This product uses a classification 1 laser sys‐
te m. If the housing is opened or damaged,
laser radiation may damage your retina. #
Do not open the housing. #
Alw ays ha vemaintenance workand
re pairs car ried out byaqu alified spe‐
cialist workshop. This device is a class 1 laser product in accord‐
ance with DIN EN 60825-1:20
14
The camera is located in theove rhead control
panel.
If th eve hicle is fitted wi th the MBUX Interior
Assis tant, selected functions of the multimedia
sy stem can be operated conta ct-free. The MBUX
Interior Assi stant can dif fere ntia tebetween
driver and front passenger interactions and
de tects specific hand positions (poses). Sy
stem limits, display messages and no tes
fo rre ctification
The sy stem may be impaired or may not function
in thefo llowing situations:
R The camera in theove rhead control panel
may heat up due tooperating conditions. As
a re sult the camera may switch off temp ora‐
ri ly , particular lyduring longer periods of
operation and at high outside temp eratures.
Do not touch or co verth e camera and wait
until the camera has cooled down and is
av ailable again.
R The camera is co vered or dirty, mis ted up or
scratched.
Wa it until the camera has cooled down
before cleaning the camera lens.
Clean the outside of the camera lens with a
dry or damp cotton clo th. Do not use microfi‐
bre clo ths. Do notremo vethe co ver when
cleaning.
R Recognition can be impaired byreflective
clo thing, an adverse colour of clo thing or by
accesso ries, forex ample. 258
MBUX multimedia sy stem

#
Select Call.
R Afteryo ur agreement, or if the Mercedes
me connect service "Accident and Break‐
down Management" is active, theve hicle
data is transfer red automatically
(/ page 277).
R The Me rcedes-Benz Cus tomer Centre
ta ke syo ur call and or ganises the break‐
down and accident assis tance.
Yo u may be charge dfo rth ese services.
% Depending on the se verity of the accident,
an automatic emer gency call can be initi‐
ated. This has prio rity over all other active
calls.
% In addition, if the Mercedes me connect
service "Telediagnostics" is active, a similar
prom ptcan appear af ter a delay in theeve nt
of a breakdown. If you are already in contact
with the Mercedes-Benz Cus tomer Centre or
ha ve already recei ved support, this prom pt
can be igno red or declined.
% Ifyo u ans werth e prom ptfor support from
th e Mercedes-Benz Cus tomer Centre with Later,
the message will be hidden and
appear again later.
The prom pttrig geredby the Mercedes me
connect service "Telediagnostics", can either
be confi rmed or declined. Af ter being
declined, this will not be shown again.
Ar ranging a service appointment via a
Mercedes me call
If yo u ha veactivated the maintenance manage‐
ment service, releva nt vehicle data is transfer red
automatically tothe Mercedes-Benz Cus tomer
Centre. You will then recei veindividual recom‐
mendations rega rding the maintenance of your
ve hicle.
Re gardless of whe ther you ha veconsented to
th e maintenance management service, the multi‐
media sy stem reminds you af ter a cer tain
amount of time that a service is due. A prom pt
appears asking if youwo uld like tomake an
appointment. #
Toarra nge a service appointment: select
Call .
Af teryo ur agreement, theve hicle data is
transfer red and the Mercedes-Benz cus tomer centre
take syo ur prefer red appointment
date. The information is then sent to your
desired service outlet.
This will contact youto confirm the appoint‐
ment and if necessary consult about the
de tails.
% Ifyo u select Laterafte rth e service message
appears, the message is hidden and reap‐
pears at a later time.
Giving consent todata transfer during a
Mercedes me call
Re quirements:
R There is an active Mercedes me call via the
multimedia sy stem or the me button in the
ov erhead control panel (/ page278).
% The prom pttoconfirm da tatrans fer does
not appear in all countries.
If th eAc cident and Breakdown Management
services are not acti vated on Mercedes me, the
Do you want to transmit vehicle data and the
vehicle's position to the Mercedes-Benz Cus-
tomer Centre in order to improve the process-
ing of your request? messageis shown. 280
MBUX multimedia sy stem

ASS
YST PLUS se rvice inter val display Fu
nction of the ASS YST PLUS se rvice inter val
displ ay The ASS
YST PLUS service inter val display on the
instrument display pr ovides information on the
re maining time or dis tance be fore the next
service due date.
Yo u can hide this service display using the back
button on the left-hand side of thesteering
wheel.
Depending on how theve hicle is used, the
ASS YST PLUS service inter val display may
shor tenth e service inter val, e.g. in thefo llowing
cases:
R mainly short-dis tance driving
R when the engine is of ten le ftidling for long
periods
R intheeve nt of frequent cold start phases
R vehicles with a diesel particulate filter: in
th eev ent of frequently inter rupted rege nera‐
tion of the diesel particulate filter Mercedes-Benz
recommends avoiding such
operating conditions.
Yo u can obtain information concerning the serv‐
icing of your vehicle from a qualified specialist
wo rkshop, e.g. a Mercedes-Benz Service Centre. Displaying
the service due da te On-board computer:
4 Service 5
ASSYST PLUS
The next service due date is displa yed. #
Toexitth e displa y:press the back button
on the left-hand side of thesteering wheel.
Bear in mind thefo llowing related topic:
R Operating the on-board computer
(/ page 250). Information on
regular maintenance work *
NO
TEPremature wearthro ugh failure to
obser veservice due dates Maintenance
workwhich is not car ried out at
th eright time or incomple tely can le adto
inc reased wear and damage totheve hicle. #
Adhere tothe prescribed service inter‐
va ls. #
Alw ays ha vethe prescribed mainte‐
nance workcar ried out at a qualified
specialist workshop. Special service
requ irements The prescribed service inter
val is based on nor‐
mal operation of theve hicle. Maintenance work
will need tobe per form ed more of ten if theve hi‐
cle is operated under arduous conditions or
increased loads.
The ASS YST PLUS service inter val display is only
an aid. The driver of theve hicle bears responsi‐
bility as rega rdsto whe ther maintenance work
needs tobe per form ed more of tenth an speci‐ Main
tenance and care 297

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 service inter val display can
calculate the service due date only when the
battery is connec ted. #
Notedown the service due date displa yed on
th e instrument display before disconnecting
th e battery (/ page 297). Engine compartment
Ac
tive bonn et(pedestrian pr otection) Operation of
the active bonnet (pedestrian
pr otection)
In cer tain accident situations, the actuation of
th e active bonn etreduces therisk of injury to
pedestrians. The rear area of the bonn etis
ra ised byappr oximately 80 mm.
Af ter being triggered, the active bonn etremains
in thera ised position. Limited visibility due to
th era ised bonn etcannot be ruled out.
Af terth e active bonn ethas been actuated,
pedestrian pr otection may be limited. Ha
ve the full functionality of the active bonn et
re stored immediately in a qualified specialist
wo rkshop.
If necessar y,adjust your seat position and drive
carefully toaqu alified specialist workshop. If a
safe continued journey is not possible, contact a
qu alified specialist workshop. Opening and closing
the bonnet &
WARNING Risk of accident due todriv‐
ing with the bonn etunlo cked
The bonn etmay open and block your vie w. #
Neverre lease the bonn etwhen driving. #
Before every trip, ensure that the
engine bonn etis loc ked. &
WARNING Risk of accident and inju ry
when opening and closing the bonn et
The bonnet may suddenly drop into the end
position. 298
Maintenance and care

There is a
risk of injury for an yone in the
engine bonn et's range of mo vement. #
Do not open or close the bonn etifth ere
is a person in the bonn et's range of
mo vement. &
WARNING Risk of burn s when opening
th e bonn et
If yo u open the bonn etwhen the engine has
ove rheated or when there is a fire inthe
engine compartment, thefo llowing situations
may occur:
R You could come into contact with hot
ga ses.
R You could come into contact with other
hot, escaping operating fluids. #
Before opening the bonn et, allow the
engine tocool down. #
Intheeve nt of a fire inthe engine com‐
partment, keep the bonn etclosed and
call thefire service. &
WARNING Risk of injury duetomoving
parts
Components in the engine compartment may
continue running or start up sudden ly,even if
th e ignition is switched off.
Make sure of thefo llowing before per form ing
ta sks in the engine compartmen t: #
Switch the ignition off. #
Neverre ach into the danger zone sur‐
ro unding moving co mponents, e.g. the
ro tation area of thefa n. #
Remo vejewe llery and watches. #
Keep items of clo thing and hair away
from moving parts. &
WARNING Risk of injury fromtouching
co mp onents under voltage
The ignition sy stem and the fuel injection
sy stem workunder high voltage. You could
re cei vean electric shoc k. #
Neverto uch co mponents of the ignition
sy stem or the fuel injection sy stem
when the ignition is switched on. The live components include
thefo llowing, for
ex ample:
R Ignition coils
R Spark plug connec tors
R Injectors &
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler 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
299

&
WARNING Risk of injury from usingthe
windscreen wipers while the engine bon‐
net is open
When the engine bonn etis open, and the
windscreen wipers are set in motion, you can
be trapped bythe wiper linkage. #
Alw ays switch off the windscreen wip‐
ers and ignition before opening the
engine bonn et. *
NO
TEPlug-in hybrid #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. Opening the bonnet
#
Torelease the bonn et, pull on handle 1. #
Push handle 1ofthe bonn etcatch up wards
and lift the bonn etuntil it opens automati‐
call y.
Closing the bonnet #
Lowe rth e bonn etto a height of around
20 cm and then allow it tofall, applying a lit‐
tle forc e as you let it go. 300
Maintenance and care

#
Ifth e bonn etcan still be lif ted slightl y,open
th e bonn etagain and close it with a little
more forc e until it engages cor rectly. Engine oil
Che
cking the engine oil le vel using the oil
dip stick &
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch co mponent parts described in
th efo llowing. *
NO
TEPlug-in hybrid #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. Re
quirements:
R The engine has an oil dipstic k.If not, the
engine oil le vel can be checked only with the
on-board computer (/ page 302) .
Depending on the engine, the oil dipstick may be
ins talled in the engine compartment in dif fere nt
locations.
The waiting time before checking the oil le vel
when the engine is at normal operating temp era‐
ture is five minutes. #
Park theve hicle on a le vel sur face. #
Pull oil dipstick 1out and wipe off. #
Slowly slide oil dipstick 1into the guide
tube tothestop, and pull it out again af ter
about thre e seconds.
R Oil le vel is cor rect: oil le vel is between 2
and 3.
R Oil le velto o low: oil le vel is at 3or
belo w. Maintenance and care
301

R
Oil le velto o high: oil le vel is abo ve2 . #
Ifth e oil le vel is too lo w,top up with 1 litre of
engine oil. #
Ifth e oil le vel is too high, drain off excess
engine oil. Consult a qualified specialist
wo rkshop.
Checking the engine oil le vel using the on-
board compu ter
Re quirements:
R The engine has been warmed up.
R The vehicle is par ked on a le vel sur face.
R The engine is running at idle speed.
R The bonnet is closed.
The engine oil le vel is de term ined during driving.
De term ining the engine oil le vel can take up to
30 minutes with a normal driving style and even
longer with an active driving style. On-board computer:
4 Service 5
Engine oil level
One of thefo llowing messages will appear on
th e multifunction display:
R Engine oil level Measuring now : measure‐
ment of the oil le vel is not yet possible. #
Repeat there qu est af ter a maximum of
30 minutes' driving.
R Engine oil level OK andthe bar display for
indicating the oil le vel on the multifunction
display is green and is between "min" and
"max": the oil le vel is cor rect.
R Engine oil level Add 1.0 l andthe bar display
fo r indicating the oil le vel on the multifunc‐
tion display is orange and is below "min": #
Add 1 l of engine oil.
R Reduce engine oil level andthe bar display
fo r indicating the oil le vel on the multifunc‐
tion display is orange and is abo ve"max": #
Drain off any excess engine oil that has been
added. Todo so, consult a qualified specialist
wo rkshop.
R For engine oil level turn on ignition #
Switch on the ignition tocheck the engine oil
le ve l.
R Engine oil level System inoperative : The oil
le ve l sensor is defective or not connecte d. #
Consult a qualified specialist workshop.
R Engine oil level System currently unavail. #
Close the bonn et.
To pping up engine oil &
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch co mponent parts described in
th efo llowing. 302
Maintenance and care