warning light MERCEDES-BENZ CLS 2014 Workshop Manual

Problems with the engine
ProblemPossible causes/consequences andSolutions
The engine does not
start. The starter motor
can be heard.
RThere isamalfunction in the engine electronics.
RThere isamalfunction in the fuel supply.
XBefore attempting to start the engine again, turn the SmartKey
in the ignition back to position0or press the Start/Stop button
repeatedly until all indicator lamps in the instrumentcluster go
out.
XTry to start the engine again (Ypage 149). Avoid excessively
long and frequent attemptstostart the engine as these will drain
the battery.
If the engine does not start after several attempts:
XConsultaqualified specialist workshop.
The engine does not
start.You cannot hear
the starter motor.
The on-board voltage is too low because the battery is too weak
or discharged.
XJump-startthe vehicle (Ypage 326).
If the engine does not start despite attemptstojump-start it:
XConsultaqualified specialist workshop.
The starter motor was exposed toathermal load that was too high.
XAllow the starter motor to cool down for approximately two
minutes.
XTry to start the engine again.
If the engine still does not start:
XConsultaqualified specialist workshop.
The engine is not
running smoothly and
is misfiring.
There isamalfunction in the engine electronics or inamechanical
componentofthe engine management system.
XOnly depress the accelerator pedal slightly.
XHave the cause rectified immediately ataqualified specialist
workshop.
Otherwise, non-combusted fuel may get into the catalytic
converter and damage it.
The coolant
temperature gauge
showsavalue above
248‡(120 †).
The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant
to cool down.
XCheck the coolant level (Ypage 308). Observe the warning
notes as you do so and add coolant if necessary.
154Driving
Driving and parking

Automatictransmission
Important safety notes
GWARNING
If theenginespeedisabovetheidlingspeed
and you engage transmission positionDor
R,thevehiclecould pull away suddenly. There
isariskofanaccident.
When engagingtransmission positionDorR,
always firmly depress thebrakepedal and do
notsimultaneously accelerate.
GWARNING
The automatic transmission switches to
neutral positionNwhen you switchoff the
engine. The vehicle may roll away. There is a
risk of an accident.
After switching off the engine, always switch
to parking positionP.Prevent the parked
vehicle fromrolling away by applying the
parking brake.
Selector lever
Overview of transmission positions
Selector lever in AMG vehicles withPbutton
Park position with parking lock
\nReverse gear
Neutral
Drive
Transmission position and drive
program display
!If the transmission position display in the
multifunction display is not working, you
should pull away carefully to check whether
the desired transmission position is
engaged. Ideally,you should select
transmission positionDand drive program
C.Donot restrictthe shift range.
Transmission position display
Drive program display
The current position of the selector lever is
shown by the indicators next to the selector
lever.
The indicators light up when the SmartKey is
inserted into the ignition lock. The indicators
go out when the SmartKey is removed from
the ignition lock.
DIRECT SELECTlever
Overview of transmission positions
Park position with parking lock
\nReverse gear
Neutral
Drive
Automatic transmission155
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Xinsert the fuel filler cap intothe holder on
the insideoffuel filler flap.
XCompletely insert the filler neckofthe fuel
pump nozzle into the tank,hook in place
and refuel.
XOnly fill the tank until the pump nozzle
switches off.
iDo not add any more fuel after the pump
stops filling for the first time. Otherwise,
fuel may leak out.
Closing the fuel filler flap
XReplace the cap on the filler neck and turn
clockwise until it engages audibly.
XClose the fuel filler flap.
iClose the fuel filler flap before locking the
vehicle. Otherwise, the locking pin of the
central locking prevents the fuel filler flap
from closing.
iIf you are driving with the fuel filler cap
open, thereserve fuel warning lamp
flashes.Amessage appears in the
multifunction display (Ypage 251).
In addition, the\nCheck Engine warning
lamp may light up (Ypage 273).
For further information on warning and
indicator lamps in the instrument cluster,
see (Ypage 273).
Fuel filler flap emergency release
Xopen the trunklid.
XSlide down the parcel net.
XOpen the right-handside trim panel.
XRemove the first-aid kit (Ypage 320).
XDetach the emergencyrelease from
retainer.
XPull the emergency release in the direction
of arrow.
The fuel filler flap is unlocked.
XOpen the fuel filler flap.
166Refueling
Driving and parking

Parking brake
GWARNING
If you must brake the vehicle with the parking
brake, the braking distance is considerably
longer and the wheels could lock. There is an
increased danger of skidding and accidents.
Only use the parking brake to brake the
vehicle when the service brake is faulty. Do
not apply the parking brake too firmly. If the
wheels lock, release the parking brake until
the wheels begin turningagain.
GWARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
Rreleasing the parking brake
Rshifting the automatic transmission out of
the parking positionP
Rstartingthe engine.
They could also operate the vehicle's
equipment. There isarisk of an accident and
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
If you brake the vehicle with the parking
brake, the brake lamps will not light up.
XTo apply:depress parking brakefirmly.
When the engine is running, the(USA
only) or
(Canada only) indicator lamp
lights up in the instrumentcluster.
XTo release:depressthe brakepedal and
keep it depressed.
XPull release handle.
When the ignition is switched on or the
engine is running, the(USA only) or

(Canada only) indicator lamp goes out
in the instrumentcluster.
Parking thevehicle foralong period
If you leave thevehicle parked for longer than
four weeks, thebattery may be damagedby
exhaustive discharging.
If you leave thevehicle parked for longer than
six weeks, thevehicle may suffer damage as
aresult of lack of use.
XVisitaqualifiedspecialist workshop and
seek advice.
iYou can obtain informationabout trickle
chargers fromaqualifiedspecialist
workshop.
Driving tips
General notes
Important safety notes
GWARNING
If you switch off theignitionwhile driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect,
for example, the power steering and the brake
boosting effect.You will require considerably
more effort to steer and brake. There isarisk
of an accident.
Do not switch off the ignition while driving.
GWARNING
If you operate mobile communication
equipment while driving, you will be
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Braking
Important safety notes
GWARNING
If youshift down onaslipperyroadsurface in
an attempt to increasethe engine's braking
effect,the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine
braking onaslippery road surface.
Downhill gradients
!On long and steep gradients, you must
reduce the load on the brakes by shifting
early toalower gear. This allowsyou to take
advantage of the engine braking effect and
helps avoid overheating and excessive
wear of the brakes.
When you take advantage of the engine
braking effect,adrive wheel may not turn
for some time, e.g. onaslippery road
surface. This could cause damage to the
drive train. This type of damage is not
covered by the Mercedes-Benzwarranty.
Do notdepress the brake pedal continuously
while the vehicle is in motion,e.g. causing the
brakes to rub by constantly applying light
pressure to the pedal. This results in
excessive and premature wear to the brake
pads.
On long and steep downhill gradients, you
must select shift range1,2or3in good time.
This is especially important if the vehicle is
laden.
Heavy and light loads
GWARNING
If you rest your foot on the brake pedal while
driving, the brakingsystem can overheat.This
increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal asafootrest.Never
depress the brake pedal and the accelerator
pedal at the same time.
!Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected toaheavy
load, do not stop the vehicle immediately, but
drive on forashort while. This allows the
airflow to cool the brakes more quickly.
Wet roads
If you have driven foralong time in heavy rain
without braking,there may beadelayed
reaction from the brakes when braking for the
first time. This may also occur after the
vehicle has been washed or driven through
deep water.
You have to depress the brake pedal more
firmly. Maintainagreater distancefrom the
vehicle in front.
After driving onawet road or having the
vehicle washed, brake firmly while paying
attention to the traffic conditions. This will
warm up the brake discs, thereby drying them
more quickly and protecting them against
corrosion.
Limited braking performance on salt-
treated roads
If you drive on salted roads,alayer of salt
residue may form on the brake discs and
brake pads. This can result inasignificantly
longer braking distance.
RBrakeoccasionally to remove any possible
salt residue. Make sure that you do not
endanger other road users when doing so.
RCarefully depress the brake pedal and the
beginningand end ofajourney.
RMaintainagreater distancetothe vehicle
ahead.
172Driving tips
Driving and parking

Servicing the brakes
!If the red brake warning lamp lights up in
the instrumentcluster and you hear a
warningtonewhile the engine is running,
the brakefluid level may be too low.
Observe additional warningmessages in
the multifunction display.
The brakefluid level may be too low due to
brakepad wear or leakingbrakelines.
Have the brakesystem checked
immediately. This work should be carried
out ataqualified specialist workshop.
!Vehicles with 4MATIC:function or
performancetests may only be carried out
ona2-axle dynamometer. If you are
planning to have the vehicle tested on such
adynamometer, contactanauthorized
Mercedes-BenzCenter to obtain further
information first. Otherwise, you could
damage the drive train or the brakesystem.
!Vehicles with 4MATIC:as the ESP®
system operates automatically, the engine
and the ignition must be switched off
(SmartKey in position0or1in the ignition
lock or Start/Stop button in position0or
1)while the parking brakeisbeing tested
onabrakedynamometer.
Brakingmaneuvers triggeredautomatically
by ESP®may seriouslydamagethebrake
system.
!Vehicles with 4MATIC:as theESP®
system operatesautomatically, theengine
and theignition system must be switched
off (SmartKey in position0or1in the
ignition lockorStart/Stopbuttonin
position0or1)when:
Rtesting theparking brakeonabrake
dynamometer.
Ryou intendtohave thevehicletowed with
oneoftheaxlesraised.
Braking maneuvers triggered automatically
by ESP®may seriouslydamagethebrake
system.
All checksand maintenance work on the
brakesystem must be carried out at a
qualified specialist workshop. Consult a
qualified specialist workshoptoarrangethis.
Havebrakepads installed and brakefluid
replacedataqualified specialist workshop.
If thebrakesystem has only been subject to
moderateloads,you should test the
functionalityofyour brakes at regular
intervals. To do so, press firmly on thebrake
pedal when driving atahigh speed. This
improvesthegripofthebrakepads.
You can findadescription of Brake Assist
(BAS) on (Ypage 67)orofBASPLUSon
(Ypage 67).
The braking characteristics of thevehiclecan
be seriouslyimpaired if:
Rbrakepads other than those recommended
are installed
Rtherecommended brakefluid is notused
Safe braking can no longer be guaranteed.
AMG high-performance and ceramic
brakes
The high-performance brake system is
installed only on the CLS 63 AMG.
The AMG brake systems are designed for
heavy loads. This may lead to noise when
braking. This will depend on:
RSpeed
RBraking force
REnvironmental conditions, such as
temperature and humidity
The wear of individualcomponentsofthe
brake system, such as the brake pads/linings
or brake discs, depends on the individual
driving style and operating conditions.
For this reason, it is impossibletostate a
mileage that will be valid under all
circumstances. An aggressive driving style
will lead to high wear. You can obtain further
information aboutthis from your authorized
Mercedes-BenzCenter.
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sensor system. DISTRONIC PLUS brakes
automaticallysothat the set speed is not
exceeded.
Change intoalower gear in good time on long
and steep downhill gradients. This is
especially important if the vehicle is laden. By
doing so, you will make use of the braking
effect of the engine. This relieves the load on
the brake system and prevents the brakes
from overheating and wearing too quickly.
If DISTRONIC PLUS detects that there isarisk
ofacollision, you will be warned visually and
acoustically.DISTRONIC PLUS cannot
preventacollision without your intervention.
An intermittent warning tone will then sound
and the distance warning lamp will light up in
the instrument cluster. Brake immediately in
order to increase the distance to the vehicle
in front or take evasive action provided it is
safe to do so.
For DISTRONIC PLUS to assist you, the radar
sensor system must be operational.
If there is no vehicle in front,DISTRONIC
PLUS operates in the same way as cruise
control in the speed range between 20 mph
(Canada: 30 km/h) and 120 mph (Canada:
200 km/h). Ifavehicle is driving in front of
you, it operates in the speed range between
0mph (0 km/h) and 120 mph (Canada:
200 km/h).
Do not use DISTRONIC PLUS while driving on
roads with steep gradients.
As DISTRONIC PLUS transmits radar waves,
it can resemble the radar detectors of the
responsible authorities. You can refer to the
relevant chapter in the Operator's Manual if
questions are asked aboutthis.
iUSA only: This device has been approved
by the FCC asa"VehicularRadar System".
The radar sensor is intended for use in an
automotive radar system only. Removal,
tampering,oralteringofthedevice will void
any warranties, and is notpermitted by the
FCC. Do not tamper with, alter, or use in
any non-approved way.
Anyunauthorized modification to this
device could void the user's authorityto
operate the equipment.
iCanada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the
device will void any warranties, and is not
permitted. Do not tamper with, alter, or use
in any non-approved way.
Anyunauthorized modification to this
device could void the user's authorityto
operate the equipment.
Cruise control lever
To storethe currentspeed orahigher
speed
To storethe currentspeed oralower
speed
$To deactivate DISTRONIC PLUS
!To storethe currentspeed or call up the
last stored speed
To set the specified minimum distance
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again after thevehicle has been driven a
certain distance.
AIRMATIC
Vehicle level
Important safety notes
GWARNING
When thevehicle is beinglowered, people
could become trapped if their limbs are
between thevehicle body and thewheelsor
underneaththevehicle.There isarisk of
injury.
Make sure no one is underneath the vehicle
or in the immediate vicinity of the wheel
arches when the vehicle is being lowered.
GWARNING
Vehicles with level control:
The vehicle is slightly lowered if:
Ryou have selected comfort suspension
tuning and
Ryou lock the vehicle within approximately
60 seconds of switching off the engine
You and people in the vicinity of the wheel
arch or the underbody may thus become
trapped. There isarisk of injury.
Make sure that nobody is in the vicinity of the
wheel arch or the underbody when you lock
the vehicle.
!The vehicle is lowered by about 15 mm if:
Ryou have selected "Comfort tuning"
Ryou switch off the engine and then
Ryou lock the vehicle within approximately
60 seconds
When parking, position your vehicle so that
it does not make contact with the curb as
the vehicle is lowered. Your vehicle could
otherwise be damaged.
If you lock the vehicle within 60 seconds of
switching the engine off, it lowers slightly to
the selected Comfort suspension mode.
Your vehicle regulates its height
automatically.All-round level control ensures
the best possible suspension and constant
groundclearance, even withaladen vehicle.
When you drive fast,the vehicle is lowered
automatically to improve drivingsafetyand to
reducefuel consumption.
The followingvehicle levels are possible:
Rnormal
Rraised: the vehicle is raised by about
0.80 in (20 mm) when compared with the
normal level
Rlowered: the vehicle is raised by about
0.40 in (10 mm) when compared with the
normal level
iThese changes in level are so slight that
you are hardly aware of them.
The "Normal" and "Raised" vehicle levels can
be set manually.
The "Lowered” vehicle level is set
automatically:
Rat speeds above 70 mph (113km/h)
Rif you have selected "Sports tuning"
(Ypage 190)
Setting thevehicle level
Selectthe "Normal" settingfor normal road
surfaces and "Raised" for drivingwith snow
chainsoronparticularly poor road surfaces.
Your selection remainsstored even if you
remove the SmartKey fromthe ignition lock.
Setting raised level
XStart the engine.
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If indicator lampis not lit:
XPress thebutton.
Indicator lamplights up. The vehicle
heightisadjusted to raised level.
TheVehicle Risingmessage appears in
the display.
The "Raised level" setting is canceled if you:
Rdrive ataspeed over approximately
75 mph (120 km/h)
Rdrive for approximately three minutes at a
speed over 50 mph (80 km/h)
The "Raised level" remains active when you
are not driving within these speed ranges.
Setting the normal level
XStart the engine.
If indicator lampis lit:
XPress thebutton.
Indicator lampgoes out. The vehicle is
adjusted to normal level.
Suspension tuning
General notes
The electronically controlled damping system
works continuously. This improves driving
safety and ride comfort.
The damping is tuned individually to each
wheel and depends on:
Ryour driving style, e.g. sporty
Rthe road surface condition, e.g. bumps
Ryour individualselection, i.e. sports or
comfort
Your selection remains stored even if you
remove the SmartKey from the ignition lock.
Sports tuning
The firmer suspension tuning in Sport mode
ensures even better contact with the road.
Select this mode when employingasporty
driving style, e.g. on winding country roads.
XPress button.
Indicator lamplights up. Sports
suspension tuning is selected.
TheAIRMATIC SPORTmessage appears in
the multifunction display.
Comfort tuning
In comfort mode, the driving characteristics
of your vehicle are more comfortable.
Therefore, select this mode if you favor a
more comfortable driving style. Select
comfort mode also when driving fast on
straight roads, e.g. on straight stretches of
freeway.
XPress button.
Indicator lamp$lights up. Comfort tuning
is selected.
TheAIRMATIC COMFORTmessage appears
in the multifunction display.
AMG adaptive sport suspension
system
Important safety notes
GWARNING
When the vehicle is being lowered, people
could become trapped if their limbs are
between the vehicle body and the wheels or
190Driving systems
Driving and parking

underneaththevehicle.There isarisk of
injury.
Make sure no one is underneath the vehicle
or in the immediate vicinity of the wheel
arches when the vehicle is being lowered.
GWARNING
Vehicles with level control:
The vehicle is slightly lowered if:
Ryou have selected comfort suspension
tuning and
Ryou lock the vehicle within approximately
60 seconds of switching off the engine
You and people in the vicinity of the wheel
arch or the underbody may thus become
trapped. There isarisk of injury.
Make sure that nobody is in the vicinity of the
wheel arch or the underbody when you lock
the vehicle.
!The vehicle is lowered by about 0.8 in
(20 mm) if:
Ryou have selected "Comfortable tuning"
Ryou switch off the engine and then
Ryou lock the vehicle within approximately
60 seconds
When parking, position your vehicle so that
it does not make contact with the curb as
the vehicle is lowered. Your vehicle could
otherwise be damaged.
Suspension tuning
General notes
The electronically controlled damping system
works continuously.This improves driving
safety and ride comfort.
The damping is tuned individually to each
wheel and depends on:
Ryour driving style, e.g. sporty
Rthe road surface condition,e.g. bumps
Ryour individual selection of Sport, Sport+
or Comfort
Sport mode
Mode selection button
Button to store, recall and display the
selected mode
$Sport+mode indicator lamp
!Sport mode indicator lamp
The firmer suspension tuning in Sport mode
ensures better contact with the road. Select
this mode when employingasporty driving
style, e.g. on winding country roads.
XPress buttononce.
Indicator lamp!lights up. You have
selected Sport mode.
TheAMG Ride Control SPORTmessage
appears in the multifunction display.
Sport+mode
The very firm setting of the suspension tuning
in Sport+mode ensures the best possible
contact with the road. Select this mode
primarily when driving on race circuits.
If indicator lamps$and!are off:
XPress buttontwice.
Indicator lamps$and!light up. You
have selected Sport+mode.
TheAMGRideControlSPORT+message
appears in the multifunction display.
If indicator lamp!lights up:
XPress buttononce.
Secondindicator lamp$lights up. You
have selected Sport+mode.
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