check engine MERCEDES-BENZ CLS-Class 2014 W218 Owner's Guide

Display messages Possible causes/consequences and
000B Solutions
001C The battery is no
tbeing charged.
Aw arning tone also sounds.
Possible causes are:
R ad efective alternator
R at ornp oly-V-belt
R am alfunctio nintheelectronics
X Pull ove rand stop the vehicl esafelya nd switch off the engine,
paying attentio ntoroada nd traffic conditions.
X Secure the vehicl eagain st rolling away (Y page 167).
X Ope nthe hood.
X Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
X Consult aqualified specialist workshop.
If the poly-V-belt is not damaged:
X Visit aqualified specialist workshop. 0009
Check Engine Oil
Level At Next
Refueling The engine oil level has dropped to the minimum level.
Aw
arning tone also sounds.
X Chec kthe oil level when next refueling, at the latest
(Y page 307).
X If necessary, add engine oil (Y page 308).
X Have the engine checked at aqualified specialist workshop if
engine oil needs to be added more often than usual.
! Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com. 250
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
000B Solutions
0009
Check Engine Oil
Level (Add 1 quart) AM
Gvehicles: th eengineo il level is to olow.
X Chec kthe oil level when next refueling, at the latest
(Y page 307).
X If necessary, add engine oil (Y page 308).
X Have the engine checked at aqualified specialist workshop if
engine oil needs to be added more often than usual.
! Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com. 0007
Fuel Level Low The fuel level has dropped into the reserve range.
X
Refuel at the nearest gas station. 0014 There is only
avery small amount of fuel in the fuel tank.
X Refuel at the nearest gas station without fail. 0007
Gas Cap Loose The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
X
Check that the fuel filler cap is correctly closed.
If the fuel filler cap is not correctly closed:
X Close the fuel filler cap.
If the fuel filler cap is correctly closed:
X Visit aqualified specialist workshop. Driving systems
Display messages Possible causes/consequencesa
nd000B Solutions
0001
Attention Assist:
Take
aBreak! Based on certain criteria, ATTENTION ASSIST has detected fatigue
or
alack of concentratio nonthe part of th edriver. Awarning tone
alsos ounds.
X If necessary ,take abreak.
During long journeys, take regular breaks in good time so you get
enoug hrest. 0001
Attentio
nAssist Inoperative ATTENTION ASSIST is inoperative.
X
Visi taq ualified specialist workshop. Display messages
251On-boardcomputer and displays Z

Display messages Possible causes/consequences and
000B Solutions
DISTRONIC PLUS
Currently
Unavailable See
Operator'
sManual DISTRONIC PLU
Sistemporarily inoperative.
Possible causes are:
R function is impaired due to heavy rain or snow.
R the sensors in the radiator grill and the bumper are dirty.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
Aw arning tone also sounds.
When th ecauses state dabov enol onger apply, th edisplay
message disappears.
DISTRONI Cisoperational again.
If th edisplay message does no tdisappear:
X Pull over and stop the vehicle safely as soon as possible ,paying
attention to road and traffic conditions.
X Secure the vehicle against rollin gaway (Y page 167).
X Clean the sensors in the radiator grill and the bumper
(Y page 315).
X Restar tthe engine. DISTRONIC PLUS
Inoperative DISTRONIC PLUS is defective.
The following may have also failed:
R
BAS PLUS (Brake Assist System PLUS)
R PRE-SAFE ®
Brake
Aw arning tone also sounds.
X Visi taq ualified specialist workshop. DISTRONIC PLUS
Suspended You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
X
Remove your foot from the accelerator pedal. DISTRONIC PLUS
---m
ph An activation condition for DISTRONIC PLUS is not fulfilled.
X
Check the activation condition sfor DISTRONIC PLUS
(Y page 177). 256
Display messagesOn-boar
dcomputer and displays

Display messages Possible causes/consequences and
000B Solutions
0002
Remove 'Start'
Button and Insert
Key The KEYLESS-GO ke
ycan continuousl ynotbe detected.
KEYLESS-GO is temporarily malfunctionin gorisdefective. A
warnin gtonea lso sounds.
X Inser tthe SmartKey into th eignition loc kand tur nittot he
desire dposition.
X Visit aqualified specialist workshop. 0002
Close Doors to
Loc
kV ehicle At leas
tone door is open. Awarning tone also sounds.
X Close all door sand loc kthe vehicle again. Indicator and warning lamps in the
instrument cluster Warning and indicator lamps
overview
001D Low-beam headlamps
(Ypage 118)
0008 Parking lamps (Y page 118)
0015 High-beam headlamps
(Ypage 119)
00020001 Turn signal (Ypage 119)
0006 Seat belts (Ypage 265)
0004 (USA) Brakes (Y page 266)
0001 (Canada)B rakes (Ypage266)
001C ABS (Ypage267)
0011 ESP®
(Y page2 69)
0009 ESP®
OFF (Y page269)
0005 SPORT handling mode in
AMG vehicles (Y page270)
0012 SRS (Ypage272)
000A Check Engine (Y page273)
0007 Reserve fuel (Ypage273)
0017 Coolant (Ypage273)
0008 Distance warning signal
(Ypage2 75)
0008 Tire pressure monitor
(Ypage2 76) 264
Indicator and warnin
glamps in the instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
000B Solutions
0011
The yellowE
SP®
warning lamp flashes
while the vehicle is in
motion. ESP
®
or traction control has intervened because there is arisk of
skidding or at least one wheel has started to spin.
Cruise control or DISTRONIC PLUS is deactivated.
X When pulling away,o nly depress the accelerator pedal as far as
necessary.
X Ease off the accelerator pedal while the vehicle is in motion.
X Adapt your driving style to suit the road and weather conditions.
X Do not deactivate ESP ®
.
For exceptions, see: (Y page 68).0009
The yellowE
SP®
OFF
warning lamp is lit while
the engine is running. ESP
®
is deactivated.
G WARNING
If ESP ®
is switched off, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Reactivate ESP ®
.
For exceptions, see: (Y page 68).
X Adapt your driving style to suit the road and weather conditions.
If ESP ®
cannot be activated:
X Drive on carefully.
X Have ESP ®
checked at aqualified specialist workshop. 0005
AMG vehicles only:
The yellow SPORT
handling mode warning
lamp is lit while the
engine is running.
SPORT handling mode is activated.
G WARNING
When SPORT handling mode is switched on, ESP ®
is unable to
stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Only switch to SPORT handling mode in accordance with the
condition sdescribed in the "Activating/deactivating SPORT
handling mode" section (Y page 70).270
Indicator and warning lampsint
he instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
000B Solutions
0004
(USA only)
0001 (Canada only)
The red brake system
warning lamp comes on
while the vehicle is
moving. Awarning tone
also sounds. You are driving with the parking brake applied.
X
Release the parking brake.
The warning lamp goes out and the warning tone ceases. 0012
The red SRS warning
lamp is lit while the
engine is running.
There is
amalfunction in the SRS (Supplemental Restraint
System).
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Drive on carefully.
X Have SRS checked at aqualified specialist workshop
immediately.
For further information about SRS, see (Y page 41).272
Indicator and warning lampsint
he instrument clusterOn-board computer and displays

Engine
Problem Possible causes/consequences and
000B Solutions
000A
The yellow Check
Engin
ewarning lamp
light supw hile the
engin eisrunning. Ther
emay be amalfunction, for example:
R in th eenginem anagement
R in th efuel injection system
R in th eexhaust system
R in th eignition system
R in th efuel system
The emission limit values may be exceeded and th eenginem ay
be runnin ginemergenc ymode.
X Hav ethe vehicle checked as soon as possible at aqualified
specialist workshop.
i In som estates, you must immediately visit aqualified
specialist worksho passoon as th eyellow Chec kEngine warning
lamp lights up .This is due to the legal requirements in effect in
these states. If in doubt, check whether such legal regulations
apply in the state in which you are currently driving. 0007
The yellow reserve fuel
warning lamp lights up
while the engine is
running.
The fuel level has dropped into the reserve range.
X
Refuel at the nearest gas station. 0007
The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the
000A
Check Enginew arning
lamp may light up. The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
X
Check that the fuel filler cap is correctly closed.
X If the fuel filler cap is not correctly closed: close the fuel filler
cap.
X If the fuel filler cap is closed: visitaqualified specialist
workshop. 0017
The red coolant
warning lamp lights up
while the engine is
running and the coolant
temperature gauge is
at the start of the scale.
The temperature sensor for the coolant temperature gauge is
defective.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions. Do not continue
driving under any circumstances.
X Secure the vehicle against rolling away (Y page 167).
X Consult aqualified specialist workshop. Indicator and warning lampsint
he instrument cluster
273On-board computer and displays Z

Problem Possible causes/consequences and
000B Solutions
0017
The red coolant
warning lamp comes on
while the engine is
running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator
may be blocked or the electric engine radiator fan may be
malfunctioning.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
Observe the additional display messages in the multifunction
display.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 167).
X Leave the vehicle and keep asafe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and add coolant, observing the warning
notes (Y page 308).
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Do not start the engine again until the coolant temperature is
under 248 ‡(120 †). Otherwise ,the engine coul dbedamaged.
X Drive to the nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainou sterrain, and stop-and-go traffic. 0017
The red coolant
warning lamp comes on
while the engine is
running.
Awarning tone
also sounds. The coolant temperature has exceeded 248
‡(120 †). The
airflow to the engine radiator may be blocked or the coolant level
may be too low.
G WARNING
The engine is not being coole dsufficiently and may be damaged.
Do not drive whe nyour engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catchf ire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is arisk of injury.
X Observe the additional display messages in the multifunction
display.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 167).274
Indicator and warning lampsint
he instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
000B Solutions
X
Leave the vehicle and keep asafe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and add coolant, observing the warning
notes (Y page 308).
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X At coolant temperatures under 248 ‡(120 †), drive to the next
qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainou sterrain, and stop-and-go traffic. Driving systems
Problem Possible causes/consequencesa
nd000B Solutions
0008
The red distance
warning lamp lights up
while the vehicle is in
motion.
The distance to the vehicle in front is too smal
lfor the speed
selected.
X Increase the distance. 0008
The red distance
warning lamp lights up
while the vehicle is in
motion
.Awarning tone
also sounds. You are approaching
avehicle or astationary obstacle in your line
of travel at too high aspeed.
X Be prepared to brake immediately.
X Pay careful attention to the traffic situation. You may have to
brake or take evasive action.
Further information on PRE-SAFE ®
Brake (Y page 72). Indicator and warning lampsint
he instrument cluster
275On-board computer and displays Z

!
Make sure that the windshieldw ipers are
not folded away fro mthe windshield. You
could otherwise damage the windshield
wipers or the hood. X
Make sure that the windshield wipers are
turned off.
X Pull release lever 001Aon the hood.
The hood is released. X
Reach into the gap, pull hood catch
handle 0010up and lift the hood.
If you lift the hood by approximately
15 inches (40c m),the hood is opened and
held open automatically by the gas-filled
strut.
Closing theh ood X
Lower the hood and let it fall from aheight
of approximately 8inche s(20 cm).
X Check that the hood has engaged properly.
If the hood can be raised slightly ,itisnot
properly engaged. Open it again and close
it with alittle more force. Engine oil
General notes Depending on the driving style, the vehicle
consume
supto0.9 US qt (0.8 liters) of oil
over adistanc eof600 miles (1,000 km). The
oil consumption may be higher than this when
the vehicle is new or if you frequently drive at
high engin espeeds.
Depending on the engine, the oil dipstic kmay
be in adifferent location.
When checking th eoil level:
R park th evehicle on aleve lsurface.
R thee ngines hould be switched off for
approximately fiv eminute siftheengin eis
at normal operatin gtem perature.
R if th eengineisn otat normal operating
temperature, e.g .ifthe engine was only
started briefly, wait about 30 minutes
before carrying out the measurement.
Checking the oil level using the oil
dipstick X
Pull oil dipstick 001Aout of the dipstick guide
tube.
X Wipe off oil dipstick 001A.
X Slowly slide oil dipstick 001Ainto the guide
tube to the stop, and take it out again.
If the level is between MIN mark 0024and
MAX mark 0010,the oil level is correct.
X If the oil level has dropped to MIN mark
0024 or below, add 1.1 US qt (1.0 liter) of
engine oil. Engine compartment
307Maintenance and care Z