catalytic converter MERCEDES-BENZ C-Class COUPE 2017 CL205 Owner's Manual

During the periodof18monthsfromo riginal
deliver yofthe vehicl eorthe accumulation of
18,000 miles (approximatel y29,000 km) on the
odometer of the vehicle, whicheve roccurs first,
ar easonabl enumbe rofrepairattempts is pre-
sumed for aretail buye rorlesseeifo ne or more
of the following occurs:
(1) the same substantial defect or malfunction results in acondition thati slikel ytoc ause
death or serious bodily injury if the vehicl eis
driven, thatd efect or malfunctio nhasbeen
subject to repai rtwo or mor etimes, and you
have directl ynotifie dMercedes-Benz USA,
LLC in writing of the nee dfor its repair.
(2) the same substantial defect or malfunction ofalesss erious nature thanc ategory (1)
hasb eens ubject to repai rfou rorm ore
time sand yo uhaved irectl ynotified
Mercedes-Benz in writing of the nee dfor its
repair.
(3) the vehicl eisoutof servic ebyreason of
repai rofthe same or different substantial
defects or malfunctions for acumulative
totalofm oret han30c alendar days.
Please sen dyourw ritte nn otice to:
Mercedes-Benz USA, LLC
Customer Assistance Center
One Mercedes Drive
Montvale ,NJ07645-0350
Maintenance
The Service and Warranty Bookle tdescribe sall
the necessary maintenance work which should
be done at regular intervals.
Alway shavet he Service and Warranty Booklet
with yo uwheny ou bring the vehicl etoan
authorize dMercedes-Benz Center. The service
advisor will record every servic efor yo uint he
Service and Warranty Booklet.
Roadside Assistance
The Mercedes-Benz Roadside Assistance Pro-
gra mo ffers technica lhelpint he event of a
breakdown. Call stothe toll-free Roadside Assis-
tance Hotline ar eanswered by ou ragents 24
hours aday,3 65 days ayear.
1-800-FOR-MERCedes(1-800-367-6372)
(USA)
1-800-387-010 0(Canada) For additional information, refer to the
Mercedes-Benz Roadside Assistance Program
brochure (USA) or the "Roadsid
eAssistance"
sectio ninthe Service and Warranty booklet
(Canada). Yo uwillf ind both in your vehicl elit-
eratur eportfolio.
Chang eofaddress or chang eofown-
ership
In the event of achange of address, please send
us the "Notification of Addres sChange" in the
Service and Guarante ebooklet or simpl ycallthe
Mercedes-Benz Customer Assistance Center
(USA) at the hotline number
1-800-FOR-MERCede s(1-800-367-6372) or
Customer Service Center (Canada )at
1-800-387-0100 .Thisw illa ssis tusinc ontact-
ing yo uinat imely manne rshoul dthe nee darise.
If yo uselly ou rM ercedes, please leave the entire
literature in the vehicl esothatiti savailable to
the next owner.
If yo uhavep urchased ausedc ar,p leas esend us
the "Notificatio nofUsedCarPurchase" in the
Service and Guarantee bookle torsimplyc allthe
Mercedes-Benz Customer Assistance Center
(USA) at the hotline number
1-800-FOR-MERCedes(1-800-367-6372) or
Customer Service (Canada )at1 -800-387-0100.
Vehicl eoperatio noutside the USA
and Canada
If yo uplantoo perate your vehicl einforeign
countries, please be aware that:
Rservice facilities or replacement parts may
not be readily available.
Runleade dfuelfor vehicles with acatalytic
converter may not be available .Leade dfuel
may cause damag etothe catalytic converter.
Rthe fue lmay have aconsiderably lowe roctane
rating. Unsuitabl efue lcan cause engine dam-
age.
Some Mercedes-Benz model sare available for
delivery in Europe throug hourEuropean Deliv-
ery Program. For details ,consult an authorized
Mercedes-Benz Center or write to one of the
following addresses.
In the USA
Mercedes-Benz USA, LLC
European Delivery Department
Servic eand vehicle operation27
Introduction
Z

Starting the engine
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park position P
RStart the engine.
There is arisk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is ar isk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
GWARNING
Flammable materials introduced through
environmental influence or by animals can
ignite if in contact with the exhaust system or
parts of the engine that heat up. There is arisk
of fire.
Carry out regular checkstom ake sure that
there are no flammable foreign materials in
the engine compartmentorint he exhaust
system.
General notes
The catalytic converter is preheated for up to
30 seconds after acold start. The sound of the
engine may change during this time.
Automatic transmission
XShift the transmission to position P
(Ypage 141).
The transmission position display in the mul-
tifunction display shows P(
Ypage 142).
iYou can start the engine in transmission
position Pand N.
Starting procedurew ith the SmartKey
To start the engine using the SmartKey instead
of the Start/Stop button, pull the Start/Stop
button out of the ignition lock.
XTurn the SmartKey to position 3in the ignition
lock and release it as soon as the engine is
running (
Ypage 131).
If the engine will not start:
XRemove the SmartKey from the ignition lock.
XReinsert the SmartKey into the ignition lock
after ashort waiting period.
XTurn the SmartKey to position 2in the ignition
lock (Ypage 131).
The indicator lamps in the instrumentc luster
light up (
Ypage 246).
XTurn the SmartKey to position 3in the ignition
lock (Ypage 131) and release it as soon as the
engine is running.
Starting procedurew ith the Start/Stop
button
The Start/Stop button is only available on vehi-
cles with KEYLESS-GO or the KEYLESS-GO start
function.
The Start/Stop button can be used to start the
vehicle manually without insertingt he SmartKey
into the ignition lock. The Start/Stop button
must be inserted in the ignition lock and the
SmartKey must be in the vehicle. This mode for
startin gthe engine operates independently of
the ECO start/stop automatic engine start func-
tion.
You can start the engine if avalid SmartKey is in
the vehicle. Switch off the engine and always
take the SmartKey with you when leaving the
Driving133
Driving and parking
Z

Problems with the engine
ProblemPossible causes/consequences andMSolutions
The engine does not
start. The starter motor
can be heard.RThere isamalfunction in the engine electronics.
RThere is amalfunction in the fuel supply.
Before attempting to start the engine again:
XTurn the SmartKey back to position 0in the ignition lock.
or
XPress the Start/Stop button repeatedly until all indicator lamps in
the instrumentc luster go out.
XTry to start the engine again (Ypage 133). Avoid excessively long
and frequent attemptstos tart the engine as these will drain the
battery.
If the engine does not start after several attempts:
XConsult aqualified 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-start the vehicle (Ypage 308).
If the engine does not start despite attempt stojump-start it:
XConsult aqualified specialist workshop.
The starter motor was exposed to athermal load that was too high.
XTry to start the engine again (Ypage 133).
If the engine still does not start:
XConsult aqualified specialist workshop.
The engine is not running
smoothly and is misfir-
ing.There is amalfunction in the engine electronics or in amechanical
componentoft he engine management system.
XOnly depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it.
XHave the cause rectified immediately at aqualified specialist work-
shop.
The coolant temperature
gauge shows avalue
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 290). Observe the warning notes
as you do so and add coolant if necessary.
138Driving
Driving and parking

Jump-starting
For the jump-starting procedure, use only the jump-starting connection point in the engine com-
partment,consisting of apositive terminal and aground point.
All vehiclese xcept vehiclesw ithalithium-ion battery:
GWARNING
Battery acid is caustic. There is arisk of injury.
Avoid contact with skin, eyes or clothing. Do not inhale any battery gases. Do not lean over the
battery. Keep children away from batteries. Wash away battery acid immediately with plenty of
clean water and seek medical attention.
GWARNING
During charging and jump-starting, explosive gases can escape from the battery. There is arisk
of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient ven-
tilation while charging and jump-starting. Do not lean over abattery.
GWARNING
During the charging process, abattery produces hydrogen gas. If ashort circuit occurs or sparks
are created, the hydrogen gas can ignite. There is arisk of an explosion.
RMake sure that the positive terminal of aconnected battery does not come into contact with
vehicle parts.
RNever place metal objects or tools on abattery.
RIt is important that you observe the described order of the battery terminals when connecting
and disconnecting abattery.
RWhen jump-starting, make sure that the battery poles with identical polarity are connected.
RIt is particularly important to observe the described order when connecting and disconnecting
the jumper cables.
RNever connect or disconnectt he battery terminals while the engine is running.
GWARNING
Ad ischarged battery can freeze at temperatures below freezing point. When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is arisk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.
If, at low temperatures, the indicator lamps/warning lamps in the instrument cluster do not light up,
it is highly likely that the discharged battery has frozen.Int his case, you may neither charge the
battery nor jump-start the vehicle. The service life of athawed-out battery may be shorter. The
starting characteristicsc an be impaired, particularly at low temperatures. Have the thawed-out
battery checked at aqualified specialist workshop.
All vehicles:
!Avoid repeated and lengthy starting attempts. Otherwise, the catalytic converter could be
damaged by the non-combusted fuel.
308Jump-starting
Breakdown assistance