2018 MERCEDES-BENZ C-CLASS ESTATE check engine

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. 0007
Notedown the service due date displa yed on
th e instrument display before disconnecting
th e battery (0013 page 408). Engine compartment
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 000A
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. 0007
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. Maintenance and care
409

0007
Push the handle 1ofthe bonn etcatch
up wa rds and lift the bonn etby appr oximately
40 cm. 0007
Toclose: lowe rth e bonn etand let it fall from
a height of appr oximately 20 cm. 0007
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 000A
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. 0007
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. Plug-in
hybrid: be sure toobser vethe no tes in
th e Supplement. Otherwise, you may failto rec‐
ognise dangers.
Re quirements:
R the engine must ha vean oil dipstic k.If not,
th e engine oil le vel can be checked only with
th e on-board computer (0013 page413).
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. 0007
Park theve hicle on a le vel sur face. 0007
Pull oil dipstick 1out and wipe off. 412
Maintenance and care

0007
Slowly slide oil dipstick 1into the guide
tube tothestop, and take it out again af ter
appr oximately 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.
R Oil le velto o high: oil le vel is abo ve2 . 0007
Ifth e oil le vel is too lo w,top up with 1 litre of
engine oil. 0007
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:
The engine must ha vean oil le vel sensor. If not,
th e engine oil le vel can be checked only with the
oil dipstick (0013 page412).
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. In order
torecei veare sult as quickly as possi‐
ble:
R warm upthe engine
R park theve hicle on a le vel sur face
R leave the engine running at idling speed
On-board compu ter:
0018 Service 0019
Engine oil level
Yo u will see one of thefo llowing messages on
th e multifunction display:
R Engine oil level Measuring now : measure‐
ment of the oil le vel is not yet possible. 0007
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": 0007
Top up with 1 l 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": 0007
Drain off excess engine oil that has been
added. Consult a qualified specialist work‐
shop.
R For engine oil level turn on ignition: 0007
switch on the ignition tocheck the engine oil
le ve l.
R Engine oil level System inoperative : sensor
fa ulty or not inser ted. 0007
Consult a qualified specialist workshop.
R Engine oil level System currently unavail. : 0007
close the bonn et.
To pping up engine oil 000A
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. Maintenance and care
413

0007
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. 000A
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. 0007
Make sure that no engine oil is spilled
next tothefiller opening. 0007
Allow the engine tocool off and thor‐
oughly clean the engine oil from compo‐
nent parts before starting theve hicle. 000E
NO
TEEngine dama gecaused byan
incor rect oil filter, incor rect oil or addi‐
tives 0007
Do not use engine oils or oil filters
which do not cor respond tothe specifi‐
cations explicitly prescribed forthe
service inter vals. 0007
Do not alter the engine oil or oil filter in
order toachie velonger change inter vals
th an presc ribed. 0007
Do not use additives. 0007
Follow the instructions in the service
inter val display rega rding the oil
ch ange. 000E
NO
TEDama gecaused bytopping up too
much engine oil To
o much engine oil can damage the engine
or the catalytic con verter. 0007
Have excess engine oil remo ved at a
qu alified specialist workshop. 0007
Turn cap 1anti-clockwise and remo veit. 0007
Top up the engine oil. 0007
Replace cap 1and turn it clockwise as far
as it will go. 0007
Check the oil le vel again (0013 page412). 414
Maintenance and care

Checking
the coolant le vel 000A
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. 0007
Allow the engine tocool down and only
to uch co mponent parts described in the
fo llowing. 000A
WARNING Danger of bu rns when open‐
ing the bonn et
If yo u open the engine bonn etwhen the
engine has overheated or during a fire inthe
engine compartment, you could come into
contact with hot gases or other escaping
operating fluids. 0007
Before opening the bonn et, allow the
engine tocool down. 0007
Intheeve nt of a fire inthe engine com‐
partment, keep the engine bonn et
closed and call thefire service. 000A
WARNING Risk of scalding from hot
coolant
The engine cooling sy stem is pressurised,
particularly when the engine is warm. If you
open the cap, you could be scalded byhot
coolant spr aying out. 0007
Let the engine cool down before open‐
ing the cap. 0007
When opening the cap, wear pr otective
gl ove s and saf etygl asses. 0007
Open the cap slowly torelease pres‐
sure. 0007
Park theve hicle on a le vel sur face. 0007
Check the coolant temp erature display in the
instrument clus ter.
The coolant temp erature must be below
70 °C. 0007
Slowly turn cap 1anti-clockwise torelie ve
ov erpressure. Maintenance and care
415

000A
WARNING Risk ofexplosion from hydro‐
ge nga s igniting
A battery generates hydrogen gas during the
ch arging process. If there is a short circuit or
spar ksstart toform ,th ere is a danger of the
hy drogen gas igniting. 0007
Make sure that the positive term inal of
th e connected battery does not come
into conta ct withvehicle parts. 0007
Never place me tal objects or tools on a
batter y. 0007
When connecting and disconnecting the
batter y,yo u must obse rveth e descri‐
bed order forth e battery clamps. 0007
When giving starting assis tance, al ways
make sure that you on lyconnect bat‐
te ry term inals with identical polarity. 0007
During starting assis tance, you must
obse rveth e described order for con‐
necting and disconnecting the jump
lead. 0007
Do not connect or disconnect the bat‐
te ry cla mp s while the engine is running. 000A
WARNING Risk ofexplosion during
ch arging process and starting assis tance
During thech arging process and starting
assis tance, the battery may release an explo‐
sive gas mixture. 0007
Avoid fire , naked flames, creating
spar ksand smoking. 0007
Make sure that there is suf ficient venti‐
lation du ring thech arging process and
during starting assis tance. 0007
Do not lean over a batter y. 000A
WARNING Risk ofexplosion from a fro‐
zen battery
A dischar ged battery may freeze at temp era‐
tures slightly abo veor below freezing point.
During starting assis tance or battery charg‐
ing, bat tery gas may be released. 0007
Alw aysth aw a frozen bat tery out first
before charging it or per form ing start‐
ing assis tance. If
th e indicator/warning lamps in the instrument
clus ter do not light up at low temp eratures, it is
ve ry likely that the dischar ged battery has fro‐
zen. In this case you may neither jump-s tart the
ve hicle nor charge the batter y.
The service life of a battery that has been
th awe d may be dramatically shor tened. The
st arting characteristics may be impaired, espe‐
cially at low temp eratures.
It is recommended that you ha veathaw ed bat‐
te ry checked at a qualified specialist workshop.
All vehicles
Plug-in hybrid: obser vethe no tes in the Supple‐
ment. Otherwise, you may failto recognise dan‐
ge rs.
000E NO
TEDama gecaused bynumerous or
ex tended attem ptsto start the engine Nume
rous or extended attem ptsto start the
engine may damage the catalytic con verter
due tonon-combu sted fuel. 0007
Avoid numerous and extended attem pts
to start the engine. 438
Breakdown assis tance

0007
Remo vetheto wing eye. 0007
Have theve hicle checked at a qualified spe‐
cialist workshop. Electrical fuses
Note
s on electrical fuses 000A
WARNING Risk of accident and inju ry
due to ov erloaded lines
If yo u manipulate or bridge a faulty fuse or if
yo ure place it with a fuse with a higher
amperage, the electric line could be overloa‐
ded.
This could result in a fire. 0007
Alw aysre place faulty fuses with speci‐
fi ed new fuses conta iningthe cor rect
amperage. 000E
NO
TEDama gedue toincor rect fuses Electrical components or sy
stems may be
damaged byincor rect fuses, or their func‐
tionality may be significant lyimpaired. 0007
Only use fuses that ha vebeen appr oved
by Mercedes-Benz and which ha vethe
cor rect fuse rating. Blown fuses mu
stbe replaced with fuses of the
same rating, which you can recognise bythe col‐
our and fuse rating. The fuse ratings and fu rther
information tobe obser ved are lis ted in the fuse
assignment diagram.
Fu se assignment diag ram: onthe fuse box in
th e load compartment (0013 page449).
000E NO
TEDama geor malfunctions caused
by moisture Moisture may cause dama
getothe electrical
sy stem or cause it tomalfunction. 0007
When the fuse box is open, make sure
th at no moisture can enter the fuse
box. 0007
When closing the fuse box, make sure
th at the seal of the lid is positioned cor‐
re ctly on the fuse box. If
th e newly inser ted fuse also blo ws, ha vethe
cause traced and rectified at a qualified special‐
ist workshop.
Ensure thefo llowing before replacing a fuse:
R The vehicle is secured against rolling away
R All electrical consumers are switched off
R The ignition is switched off
The electrical fuses are located in various fuse
bo xes:
R Fuse box in the engine compartment on the
driver's side (0013 page448)
R Fuse box on the driver's side of the cockpit
(0013 page449)
R Fuse box in the front passenger foot we ll
(0013 page449)
R Fuse box in the load compartment on the
ri ght-hand side of theve hicle, when vie wed
in the direction of tra vel (0013 page449) Breakdown assis
tance 447

Opening and closing
the fuse box in the
engine compa rtment Re
quirements:
R A dry clo thand a sc rewdriver are available.
Obse rveth e no tes on electrical fuses
(0013 page447).
Opening 000A
WARNING Risk of inju ryfrom using the
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. 0007
Alw ays switch off the windscreen wip‐
ers and ignition before opening the
engine bonn et. 0007
Turn clip 2on co ver1 aqu arter-turn to
th e left. 0007
Fold co ver1 up in the direction of the
ar row. 0007
Remo veany existing moisture from the fuse
box using a dry clo th. 0007
Loosen scr ews3 and remo vefuse box lid
4 from theto p.
Closing 0007
Check whe ther the seal is positioned cor‐
re ctly in lid 4. 448
Breakdown assis tance