2018 MERCEDES-BENZ C-CLASS SALOON check engine

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 page445).
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. 446
Breakdown assis tance

Ad
Blue ®
filling capacity and consum ption
To tal capacity of AdBlue ®
tank Mode
lT otal capacity
All models 25 litresAd
Blue ®
consu mption
Like fuel consu mption, AdBlue ®
consu mption is
highly dependent upon driving style and operat‐
ing conditions. Forth is reason, your vehicle's
actual consum ption figures under normal operat‐
ing conditions may dif fer from the consum ption
fi gures calculated. AdBlue ®
consu mption is
between 1% and 5% of fuel consumption. Ha ve
th eAd Blue ®
supply checked at a qualified spe‐
cialist workshop before making journe ysoutside
of Europe. Before a longer stay outside of
Europe, consult a qualified specialist workshop.
Display theAd Blue ®
ra nge and le vel
( 0013 page274). Engine oil
Note
s on engine oil
Obser vethe no tes on operating fluids
(0013 page475). 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
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. Te
ch nical da ta481

Display messages
Possible causes/consequences and 0050
0050Solutions 0007
Consult a qualified specialist workshop immediatel y.
Active Brake Assist Func-
tions currently limited See
Owner's Manual *
Ve hicles with the Driving Assistance Package: Active Brake Assi stwith cross-traf fic function, Evasi veSteering
Assist or PRE‑SAFE ®
PLUS are temp orarily una vailable or only partially available.
Ve hicles without the Driving Assistance pa ckage: Active Brake Assi stistemp orarily una vailable.
The ambient conditions are outside the sy stem limits (0013 page 208). 0007
Drive on.
As soon as the ambient conditions are within the sy stem limits, the sy stem will become available again. 0007
Ifth e display message does not disappear, stop theve hicle while paying attention toroad and traf fic conditions
and restart the engine.
0075
Restraint sys. malfunction
Consult workshop *T
herestra int sy stem is faulty (0013 page 33). 000A
WARNING Risk of inju ryor fata l injury due toa malfunction in there stra int sy stem
If th ere stra int sy stem is malfunctioning, restra int sy stem components may be triggered unintentionally or
might not be triggered at all in theeve nt of an accident. This may af fect the seat belt tensioner or airbag, for
ex ample. 0007
Have there stra int sy stem checked and repaired immediately at a qualified specialist workshop. De
tection of a restra int sy stem fault:
R The restra int sy stem warning lamp 0075does not light up when the ignition is switched on.
R The restra int sy stem warning lamp 0075lights up continuously or repeatedly during a journe y. Displ
aymessa ges and warning/indicator lamps 503

Display messages
Possible causes/consequences and 0050
0050Solutions
Blind Spot Assist inopera-
tive *B
lind Spot Assist is malfunctioning. 0007
Consult a qualified specialist workshop.
Active Parking Assist and
PARKTRONIC inoperative
See Owner's Manual *A
ctive Parking Assist and Parking Assist PARKTRONIC are malfunctioning. 0007
Stop theve hicle, paying attention toroad and traf fic conditions, and restart the engine. 0007
Ifth e display message continues tobe displa yed, consult a qualified specialist workshop.
Active Blind Spot Assist
currently unavailable See
Owner's Manual *A
ctive Blind Spot Assi stistemp orarily una vailable.
The sy stem limits ha vebeen reached (0013 page 256). 0007
Drive on.
Once the cause of the problem is no longer present, the sy stem will be available again. 0007
Ifth e display message does not disappear, stop theve hicle while paying attention toroad and traf fic conditions
and restart the engine. Active Steering Assist cur-
rently unavailable See Own-
er's Manual
*A
ctive Steering Assist is temp orarily una vailable.
The ambient conditions are outside the sy stem limits (0013 page 224). 0007
Drive on.
As soon as the ambient conditions are within the sy stem limits, the sy stem will become available again. 0007
If necessar y,clean the windscreen in the camera's field of vision. 0007
Check the tyre pressure if necessar y.506
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions
00B2 Engine oil level Stop vehi-
cle Switch engine off *D
isplay message only for cer tain engines:
The engine oil le vel is too lo w.
000E NO
TEEngine dama gecaused bydriving with insuf ficient engine oil 0007
Avoid long journe yswith insuf ficient engine oil. 0007
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances. 0007
Switch off the engine. 0007
Add 1 l engine oil. 0007
Check the engine oil le vel.
To p up engine oil (0013 page411).
No tes on engine oil (0013 page 481).
00B2
Engine oil pressure Stop
Switch off engine *D
isplay message only for cer tain engines:
The engine oil pressure is too lo w.
000E NO
TEEngine dama gecaused bydriving with insuf ficient engine oil pressure 0007
Avoid driving with insuf ficient engine oil pressure. 520
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions 0007
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances. 0007
Consult a qualified specialist workshop.
00B2 Add 1 litre engine oil when
next refuelling *D
isplay message only for cer tain engines:
The engine oil le vel has dropped tothe minimum le vel.
000E NO
TEEngine dama gecaused bydriving with insuf ficient engine oil 0007
Avoid long journe yswith insuf ficient engine oil. 0007
When next refuelling, add 1 litre of engine oil.
To p up engine oil (0013 page411).
No tes on engine oil (0013 page 481).
00B2
Check eng. oil lev. when
next refuelling *T
he engine oil le vel has dropped tothe minimum le vel.
000E NO
TEEngine dama gecaused bydriving with insuf ficient engine oil 0007
Avoid long journe yswith insuf ficient engine oil. 0007
Check the engine oil le vel when next refuelling.
To p up the engine oil (0013 page411). Displ
aymessa ges and warning/indicator lamps 521

Display messages
Possible causes/consequences and 0050
0050Solutions
Check tyre pressures then
restart Run Flat Indicator 0007
When the tyre pressure is cor rect, restart the tyre pressure loss warning sy stem (0013 page 457).
Run Flat Indicator inopera-
tive *T
he tyre pressure loss warning sy stem is malfunctioning. 0007
Consult a qualified specialist workshop. Key
Display messages
Possible causes/consequences and 0050 0050Solutions
00AF Key not detected (red dis‐
play message) *T
hekey cannot be de tected and may no longer be in theve hicle.
The key is no lon ger in theve hicle and you swit choff the engine:
R You can no lon gerst art the engine.
R You cannot centrally lock theve hicle. 0007
Ensure that theke y is in theve hicle.
If th eke y de tection function has a malfunction due toast ro ng radio signal source: 0007
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. 0007
Place theke y in the slot forst arting the engine with theke y (0013 page169). Displ
aymessa ges and warning/indicator lamps 533

Display messages
Possible causes/consequences and 0050
0050Solutions
Operation only possible in
transmission position P
00CA
Operation only possible in
transmission position N *
Ve hicles with manual transmission: you attem ptedto swivel the ball neck and the transmission is not in neutral
005C. 0007
Shift the transmission toneutral 005C.
00CA Check trailer hitch lock
(whi tedisplay message) *T
he trailer tow hit chis not operational when you are driving with a trailer. 0007
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. 0007
Uncouple the trailer and secure it against rolling away. 0007
Initiate a new swivelling procedure (0013 page 262). 0007
Ifth e ball neck is extended, press and hold the button on the boot lid until the ball neck engages beneath the
bumper. 0007
When the display message disappears, couple up the trailer and drive on. 000A
WARNING Risk of an accident if the ball neck is not loc ked
If th e ball neck is not in the loc ked position, the trailer may come loose. 0007
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions.
Do not continue driving under any circums tances. 536
Display messa ges and warning/indicator lamps