2017 MERCEDES-BENZ SLC-Class catalytic converter

have directly notified Mercedes-BenzUSA,
LLC in writing of the need for its repair.
(2) the same substantial defect or malfunction ofaless serious nature than category (1)
has been subject to repair four or more
times and you have directly notified
Mercedes-Benzinw riting of the need for its
repair.
(3) the vehicle is out of service by reason of repair of the same or different substantial
defects or malfunctions for acumulative
total of more than 30 calendar days.
Please send your written notice to:
Mercedes-BenzU SA, LLC
Customer Assistanc eCenter
3M ercedes Drive
Montvale, NJ 07645-0350
Maintenance
The Service and Warranty Booklet describes all
the necessary maintenanc ework which should
be done at regular intervals.
Always have the Service and Warranty Booklet
with you when you bring the vehicle to an
authorized Mercedes-BenzC enter. The service
advisor will record every service for you in the
Service and Warranty Booklet.
Breakdown assistance
The Mercedes-BenzR oadside AssistancePro-
gram offers technical help in the event of a
breakdown. Callstot he toll-free Roadside Assis-
tance Hotline are answered by our agents 24
hours aday, 365 days ayear.
1-800-FOR-MERCedes(1-800-367-6372)
(USA)
1-800-387-0100 (Canada)
For additional information, refer to the
Mercedes-BenzR oadside Assistanc eProgram
brochure (USA) or the "Roadside Assistance"
section in the Service and Warranty booklet
(Canada). You will find both in your vehicle lit-
erature portfolio.
Change of address or change of own-
ership
In the event of achange of address, please send
us the "Notification of Address Change" in the
Service and Guarantee booklet or simply call the
Mercedes-BenzC ustomer AssistanceC enter
(USA) at the hotline number
1-800-FOR-MERCedes(1-800-367-6372) or
Customer Service Center (Canada)a t
1-800-387-0100 .This will assist us in contact-
ing you in atimely manner should the need arise.
If you sell your Mercedes, please leave the entire
literature in the vehicle so that it is available to
the next owner.
If you have purchased aused car, please send us
the "Notification of Used Car Purchase" in the
Service and Guarantee booklet or simply call the
Mercedes-BenzC ustomer Assistanc eCenter
(USA) at the hotline number
1-800-FOR-MERCedes(1-800-367-6372) or
Customer Service (Canada)a t1-800-387-0100.
Vehicle operation outside the USA
and Canada
If you plan to operate your vehicle in foreign
countries, please be aware that:
Rservice facilities or replacement parts may
not be readily available.
Runleaded fuel for vehicles with acatalytic
converter may not be available. Leaded fuel
may cause damage to the catalytic converter.
Rthe fuel may have aconsiderably lower octane
rating. Unsuitable fuel can cause engine dam-
age.
Some Mercedes-Benzm odels are available for
delivery in Europe through our European Deliv-
ery Program. For details, consult an authorized
Mercedes-BenzC enter or write to one of the
following addresses.
In the USA
Mercedes-BenzU SA, LLC
European Delivery Department
One Mercedes Drive
Montvale, NJ 07645-0350
In Canada
Mercedes-BenzC anada,Inc.
European Delivery Department
98 Vanderhoof Avenue
Toronto, Ontario M4G 4C9
24Service and vehicleo peration
Introduction

As soonasthe ignition is switched on, al lthe
indicator lamps in the instrument cluster light
up .Further informatio nonsituations where an
indicator lamp either fails to go outa fterstarting
the engine or lights up whil edriving
(
Ypage 204).
If Start/Stop button :hasn ot yetbeen
pressed, thisc orrespondstot he key being
remove dfrom the ignition.
XTo switc honthe power supply: press
Start/Stop button :once.
The powe rsuppl yiss witched on. Yo ucan now
activate the windshield wipers, for example.
The powe rsuppl yiss witched off agai nif:
Rthe driver's door is opene dand
Ryoup ress Start/Stop button :twice when
in thisp osition
XTo switc honthe ignition: press Start/Stop
button :twice.
The ignition is switched on.
If yo upress Start/Stop button :once when
in thisp osition, the ignition is switched off
again.
Removing the Start/Stopb utton
Youc an remove the Start/Stop button from the
ignition lock and start the vehicl easnormal
using the SmartKey.
XRemove Start/Stop button :from ignition
lock ;.
Yo udon ot have to remove the Start/Stop but-
ton from the ignition lock when yo uleave the
vehicle. Yo ushould, however, always take the
SmartKeyw ithy ou when leaving the vehicle. As
long as the Sma rtKey
isint
he vehicle:
Rthe vehiclecan be started using the Start/
Stop button
Rthe electrically powered equipment can be
operated
Starting the engine
Important safety notes
GWARNING
If children ar eleftu nsupervised in the vehicle,
they could:
Ropen the doors ,thuse ndangering other
people or roa dusers.
Rgeto utand disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicl ein
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission outo f
park position P
RStartthe engine.
There is ariskofana ccident and injury.
Whe nleavi ng the vehicle, always take the
SmartKeyw ithy ou and lock the vehicle. Never
leav echildren or animals unattended in the
vehicle. Alway skeept he SmartKeyo utof
reach of children.
GWARNING
Combustion engine semitp oiso nousexhaust
gases such as carbo nmonoxide. Inhaling
thes eexhaus tgases lead stopoisoning. There
is ar iskoff atalinjury.T herefore neve rleave
the engine running in enclose dspaces with-
outs ufficient ventilation.
GWARNING
Flammabl ematerial sintroduced through
environmentali nfluence or by animals can
ignite if in contact with the exhaus tsystem or
parts of the engine thath eatu p.There is arisk
of fire.
Carry outr egular checks to make sure that
ther eareno flammabl eforeig nmaterial sin
the engine compartment or in the exhaust
system.
During acolds tart, the engine runs at higher
speed stoenablethe catalytic converter to
116Driving
Driving an dparking

Problems with the engine
ProblemPossible causes/consequences andMSolutions
The engine does not
start.The HOLD function or DistancePilot DISTRONIC is activated.
XDeactivatet he HOLD function (Ypage 148) or Distanc ePilot
DISTRONIC (Ypage 146).
XTry to start the engine again.
The engine does not
start. The starter motor
can be heard.RThere is amalfunction 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 116). 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 249).
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.
XAllow the starter motor to cool down for approximately two minutes.
XTry to start the engine again.
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.
120Driving
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.
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.
!Avoid repeated and lengthy starting attempts. Otherwise, the catalytic converter could be
damaged by the non-combusted fuel.
If the indicator/warning lamps do not light up at low temperatures, it is very likely that the dis-
charged 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.
Jump-starting249
Breakdown assistance
Z