2014 MERCEDES-BENZ CLS engine

ProblemPossible causes/consequences andSolutions

The yellowESP®
warning lamp flashes
while the vehicle is in
motion.
ESP®or traction control has intervened because there isarisk of
skidding or at least one wheel has started to spin.
Cruise control or DISTRONIC PLUS is deactivated.
XWhen pulling away,only depress the accelerator pedal as far as
necessary.
XEase off the accelerator pedal while the vehicle is in motion.
XAdapt your driving style to suit the road and weather conditions.
XDo not deactivate ESP®.
For exceptions, see: (Ypage 68).

The yellowESP®OFF
warning lamp is lit while
the engine is running.
ESP®is deactivated.
GWARNING
If ESP®is switched off, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XReactivate ESP®.
For exceptions, see: (Ypage 68).
XAdapt your driving style to suit the road and weather conditions.
If ESP®cannot be activated:
XDrive on carefully.
XHave ESP®checked ataqualified specialist workshop.

AMG vehicles only:
The yellow SPORT
handling mode warning
lamp is lit while the
engine is running.
SPORT handling mode is activated.
GWARNING
When SPORT handling mode is switched on, ESP®is unable to
stabilize the vehicle.
There is an increased risk of skidding and an accident.
XOnly switch to SPORT handling mode in accordance with the
conditionsdescribed in the "Activating/deactivating SPORT
handling mode" section (Ypage 70).
270Indicator and warning lampsinthe instrument cluster
On-board computer and displays

ProblemPossible causes/consequences andSolutions

The yellowESP®and
ESP®OFF warning
lamps are lit while the
engine is running.
ESP®,BAS,BAS PLUS, PRE-SAFE®,PRE-SAFE®Brake, the HOLD
function and hill start assist are not available due toamalfunction.
ATTENTION ASSIST is deactivated.
GWARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance in an emergency braking situation can thus
increase.
If ESP®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisitaqualified specialist workshop.

The yellowESP®and
ESP®OFF warning
lamps are lit while the
engine is running.
ESP®,BAS, PRE-SAFE®,the HOLD functionand hill start assist are
temporarilyunavailable.
BAS PLUSand PRE-SAFE®Brake mayalsohavefailed.
ATTENTIONASSIST is deactivated.
self-diagnosisisnot yetcomplete.
GWARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance in an emergencybraking situation can thus
increase.
If ESP®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XCarefully drive onasuitable stretch of road, making slight
steeringmovements ataspeed above 12 mph (20 km/h).
The functions mentioned above are available again when the
warning lamp goes out.
If the warning lamp is still on:
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisitaqualified specialist workshop.
Indicator and warning lampsinthe instrument cluster271
On-board computer and displays
Z

ProblemPossible causes/consequences andSolutions
(USA only)

(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.
XRelease the parking brake.
The warning lamp goes out and the warning tone ceases.

The red SRS warning
lamp is lit while the
engine is running.
There isamalfunction in the SRS (Supplemental Restraint
System).
GWARNING
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.
XDrive on carefully.
XHave SRS checked ataqualified specialist workshop
immediately.
For further information about SRS, see (Ypage 41).
272Indicator and warning lampsinthe instrument cluster
On-board computer and displays

Engine
ProblemPossible causes/consequences andSolutions
\n
The yellow Check
Enginewarning lamp
lightsupwhile the
engineisrunning.
Theremay beamalfunction, for example:
Rin theenginemanagement
Rin thefuel injection system
Rin theexhaust system
Rin theignition system
Rin thefuel system
The emission limit values may be exceeded and theenginemay
be runninginemergencymode.
XHavethevehicle checked as soon as possible ataqualified
specialist workshop.
iIn somestates, you must immediately visitaqualified
specialist workshopassoon as theyellow CheckEngine 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.

The yellow reserve fuel
warning lamp lights up
while the engine is
running.
The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.

The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the\n
Check Enginewarning
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.
XCheck that the fuel filler cap is correctly closed.
XIf the fuel filler cap is not correctly closed:close the fuel filler
cap.
XIf the fuel filler cap is closed:visitaqualified specialist
workshop.

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.
XPull 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.
XSecure the vehicle against rolling away (Ypage 167).
XConsultaqualified specialist workshop.
Indicator and warning lampsinthe instrument cluster273
On-board computer and displays
Z

ProblemPossible causes/consequences andSolutions

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.
XObserve the additional display messages in the multifunction
display.
XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 167).
XLeave the vehicle and keepasafe distance from the vehicle until
the engine has cooled down.
XCheck the coolant level and add coolant, observing the warning
notes (Ypage 308).
XIf you need to add coolant more often than usual, have the
engine coolant system checked.
XMake sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
XDo not start the engine again until the coolant temperature is
under 248‡(120 †). Otherwise,the engine couldbedamaged.
XDrive to the nearest qualified specialist workshop.
XAvoid subjecting the engine to heavy loads, e.g. driving in
mountainousterrain, and stop-and-go traffic.

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.
GWARNING
The engine is not being cooledsufficiently and may be damaged.
Do not drive whenyour engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catchfire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There isarisk of injury.
XObserve the additional display messages in the multifunction
display.
XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 167).
274Indicator and warning lampsinthe instrument cluster
On-board computer and displays

ProblemPossible causes/consequences andSolutions
XLeave the vehicle and keepasafe distance from the vehicle until
the engine has cooled down.
XCheck the coolant level and add coolant, observing the warning
notes (Ypage 308).
XIf you need to add coolant more often than usual, have the
engine coolant system checked.
XMake sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
XAt coolant temperatures under 248‡(120 †), drive to the next
qualified specialist workshop.
XAvoid subjecting the engine to heavy loads, e.g. driving in
mountainousterrain, and stop-and-go traffic.
Driving systems
ProblemPossible causes/consequencesandSolutions

The red distance
warning lamp lights up
while the vehicle is in
motion.
The distance to the vehicle in front is too smallfor the speed
selected.
XIncrease the distance.

The red distance
warning lamp lights up
while the vehicle is in
motion.Awarning tone
also sounds.
You are approachingavehicle orastationary obstacle in your line
of travel at too highaspeed.
XBe prepared to brake immediately.
XPay careful attention to the traffic situation. You may have to
brake or take evasive action.
Further information on PRE-SAFE®Brake (Ypage 72).
Indicator and warning lampsinthe instrument cluster275
On-board computer and displays
Z

Useful information
iThis Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please notethat your vehicle may
not be equipped with all features
described. This also applies to safety-
related systemsand functions.
iRead the information on qualified
specialist workshops: (Ypage 26).
Stowage areas
Loading guidelines
GWARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants.There isarisk of injury,
particularly in the eventofsudden braking or
asuddenchange in direction.
Always store objectssothat they cannot be
flung around. Secure objects, luggageor
loads against slipping or tipping before the
journey.
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is
arisk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
The handling characteristics ofaladen
vehicle are dependent on the distribution of
the load within the vehicle. For this reason,
you should observe the following notes when
transportingaload:
RNever exceed the maximum permissible
gross vehicle weight or the gross axle
weight rating of the vehicle (including
occupants). The values are specified on the
vehicle identification plate on the B-pillar of
the driver's door.
RThe trunk is the preferred place to carry
objects.
RPosition heavy loads as far forwards as
possible and as low down in the trunk as
possible.
RThe load must not protrude above the
upper edge of the seat backrests.
RAlways place the load against the rear or
front seat backrests. Make sure that the
seat backrests are securely locked into
place.
RAlways place the load behind unoccupied
seats if possible.
RUse the cargo tie down rings and the parcel
nets to transport loads and luggage.
RUse cargo tie-down rings and fastening
materials appropriate for the weight and
size of the load.
RSecure the load with sufficiently strongand
wear-resistant tie-downs. pad sharp edges
for protection.
Stowage space
Important safety notes
GWARNING
If you do not correctly store objectsinthe
vehicle interior, they can slip or be flung
around, thus strikingvehicle occupants.
There isarisk of injury, especially when
braking or abruptly changing directions.
278Stowage areas
Stowage and features

AMG vehicles
Your attention must always be focused on the
traffic conditions. Only usethe cigarette
lighterwhen road and traffic conditions
permit.
XTurn the SmartKey to position2in the
ignition lock (Ypage 147).
XTo open:briefly press the trim on
cover.
The stowage compartmentopens.
XPress in cigarette lighter.
Cigarettelighterwill pop out
automatically when the heatingelementis
red-hot.
12Vsockets
General notes
XTurn theSmartKey to position1in the
ignitionlock (Ypage 147).
The socketscan be used for accessories with
amaximum draw of 180W(15 A).
Accessories include such items as lamps or
chargers for mobile phones.
If you use the socketsfor long periods when
the engine is switched off, the battery may
discharge.
iAn emergencycut-out ensures that the
on-board voltage does not drop too low. If
the on-board voltage is too low, the power
to the socketsisautomatically cut. This
ensures that there is sufficient power to
start the engine.
Socket under the armrest
XOpen the stowage compartment under the
armrest (Ypage 280).
XLift up the cover of socket.
Socket in the front-compartment center
console
All vehicles (except AMG)
XTo open:slide coverforwards until it
engages.
XLift up the cover of socket.
XTo close:briefly press coverat the
front.
The cover moves back.
Features289
Stowage and features
Z