2018 MERCEDES-BENZ C-CLASS CABRIOLET engine oil

Notes on breaking-in a new vehicle
Important safety notes
The sensor system of some driving and driving
safety systems adjusts automatically while a
certain distance is being driven after the vehiclehas been delivered or after repairs. Full system
effectiveness is not reached until the end of this
teach-in procedure.
New and replaced brake pads and discs only
reach their optimum braking effect after several hundred kilometers of driving. Compensate for
this by applying greater force to the brake pedal.
The first 1000 miles (1500 km)
The more you look after the engine when it is
new, the more satisfied you will be with its per-
formance in the future.
RYou should therefore drive at varying vehicle
and engine speeds for the first 1000 miles
(1500 km).
RAvoid heavy loads, e.g. driving at full throttle,during this period.
RWhen changing gears manually, change up in
good time, before the tachometer needle rea-
ches Ôof the way to the red area of the tach-
ometer.
RDo not manually shift to a lower gear to brake
the vehicle.
RTry to avoid depressing the accelerator pedal
beyond the pressure point (kickdown).
RAll vehicles (except Mercedes-AMG vehi-
cles): ideally, for the first 1,000 miles
(1,500 km), drive in drive program E.
Additional breaking-in notes for Mercedes-AMG
vehicles:
RDo not drive faster than 85 mph (140 km/h)
for the first 1,000 miles (1,500 km).
ROnly briefly allow the engine to reach a max-
imum engine speed of 4,500 rpm briefly.
RChange gear in good time.
RIdeally, for the first 1,000 miles (1,500 km),
drive in program C.
After 1000 miles (1500 km), you ca
n increase
the engine speed gradually and accelerate the
vehicle to full speed.
You should also observe these notes on break-
ing in if the engine or parts of the drive train on
your vehicle have been replaced. Always observe the maximum permissible
speed.
Locking rear axle differential
(Mercedes-AMG C 63/C 63 S)
Your vehicle is equipped with a self-locking dif-
ferential on the rear axle.
Change the oil to improve protection of the rear
axle differential:
Rafter a breaking-in period of 1,850 miles
(3,000 km)
Revery 31,000 miles (50,000 km) or 3 years
These oil changes prolong the service life of the
differential. Have the oil change carried out at a
qualified specialist workshop.
Driving
Important safety notes
GWARNING
Objects in the driver's footwell may restrict
the clearance around the pedals or block a
depressed pedal. This jeopardizes the oper-
ating and road safety of the vehicle. There is a risk of an accident.
Stow all objects securely in the vehicle so that
they do not get into the driver's footwell.
When using floormats or carpets, make sure
that they are properly secured so that they do not slip or obstruct the pedals. Do not place
several floormats or carpets on top of one
another.
GWARNING
Unsuitable footwear can hinder correct usage of the pedals, e.g.:
Rshoes with thick soles
Rshoes with high heels
Rslippers
There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals.
122Driving
Dr iving an d parking

GWARNING
If you switch off the ignition while 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 is a risk
of an accident.
Do not switch off the ignition while driving.
GWARNING
If the parking brake has not been fully
released when driving, the parking brake can:
Roverheat and cause a fire
Rlose its hold function.
There is a risk of fire and an accident. Release
the parking brake fully before driving off.
!Do not warm up the engine with the vehicle
stationary. Drive off immediately. Avoid high
engine speeds and driving at full throttle until
the engine has reached its operating temper-
ature.
Only shift the automatic transmission to the
desired drive position when the vehicle is sta-
tionary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
!Mercedes-AMG vehicles: at low engine oil
temperatures below 68 ‡ (+20 †), the max-
imum engine speed is restricted in order to
protect the engine. To protect the engine and
maintain smooth engine operation, avoid driv-
ing at full throttle when the engine is cold.
Key positions
SmartKey
gTo remove the SmartKey
1Power supply for some consumers, such as
the windshield wipers
2Ignition (power supply for all consumers)
and drive position
3To start the engine
iThe SmartKey can be turned in the ignition
lock even if it is not the correct SmartKey for
the vehicle. The ignition is not switched on.
The engine cannot be started.
Start/Stop button
General notes
When you insert the Start/Stop button into the
ignition lock, the system needs approximately
two seconds recognition time. You can then use
the Start/Stop button.
Pressing the Start/Stop button several times in
succession corresponds to the different Smart-
Key positions in the ignition lock. This is only the
case if you are not depressing the brake pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately.
A check which periodically establishes a radio
connection between the vehicle and the Smart-
Key determines whether a valid SmartKey is in
the vehicle. This occurs, for example, when
starting the engine.
Driving123
Driving and parking
Z

To start the vehicle without actively using the
SmartKey:
Rthe Start/Stop button must be inserted in the
ignition lock.
Rthe SmartKey must be in the vehicle.
Rthe vehicle must not be locked with the
SmartKey or KEYLESS-GO. (Ypage 77)
Do not keep the SmartKey:
Rwith electronic devices, e.g. a mobile phone
or another SmartKey.
Rwith metallic objects, e.g. coins or metal foil.
Rinside metallic objects, e.g. a metal case.
This can affect the functionality of the Smart-
Key.
If you lock the vehicle with the SmartKey remote control or with KEYLESS-GO, after a short time:
Ryou will not be able to switch on the ignition
with the Start/Stop button.
Ryou will no longer be able to start the engine
with the Start/Stop button until the vehicle is
unlocked again.
If you lock the vehicle centrally using the button
on the front door (
Ypage 82), you can continue
to start the engine with the Start/Stop button.
The engine can be switched off while the vehicle
is in motion by pressing and holding the Start/
Stop button for three seconds. This function
operates independently of the ECO start/stop
automatic engine switch-off function.
Key positions with the Start/Stop button
:Start/Stop button
;Ignition lock
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up. Warning and indicator lamps: see
(
Ypage 241). If Start/Stop button
:has not yet been
pressed, this corresponds to the SmartKey
being removed from the ignition.
XTo switch on the power supply: press
Start/Stop button :once.
The power supply is switched on. You can now activate the windshield wipers, for example.
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop button :twice when in
this position
XTo switch on the ignition: press Start/Stop
button :twice.
The ignition is switched on.
The ignition is switched off again if:
Ryou do not start the engine from this position within 15 minutes
Ryou press Start/Stop button :once when in
this position
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop button :once when in
this position
Removing the Start/Stop button
You can remove the Start/Stop button from the ignition lock and start the vehicle as normal
using the SmartKey.
It is possible to switch between Start/Stop but-
ton mode and key operation only when the
transmission is in position j.
XRemove Start/Stop button :from ignition
lock ;.
You do not have to remove the Start/Stop but-
ton from the ignition lock when you leave the
vehicle. You should, however, always take the
SmartKey with you when leaving the vehicle. As
long as the SmartKey is in the vehicle:
Rthe vehicle can be started using the Start/
Stop button
Rthe electrically powered equipment can be
operated
124Driving
Driving and parking

Kickdown
XFormaximum acceleration ,depress th e
accelerato rpedal beyon dth epressur epoint.
The automatic transmission shift sto alower
gear depending on th eengin espeed.
XShift bac kup once th edesire dspee dis
reached. If you apply full throttle, th
eautomatic trans -
mission shift sup to th enext gear when th e
maximum engin espeed is reached. This pre -
vents th eengin efrom overrevving .
Mercedes-AMG vehicles: kickdown is only
possibl ein th etemporar ysetting .
Problems with the trans mission
ProblemPossible causes/consequences and MSolutions
The transmission has
problemsshifting gear .The transmission is losing oil.
XHaveth etransmission checke dat aqualified specialist workshop
immediately.
The acceleration abilit y
is deteriorating .
The transmission no lon -
ger changes gear .The transmission is in emergenc ymode.
It is possibl eto shift to agear and revers egear only.
XStop th evehicle.
XShift th etransmission to position j.
XSwitchoff th eengine.
XWait at least te nseconds before restarting th eengine.
XShift th etransmission to position hork.
If h is selected, th etransmission only shift sto on egear ;if k is
selected, th etransmission shift sto revers egear .
XHaveth etransmission checke dat aqualified specialist workshop
immediately.
Transfer case
This section is only valid for vehicles wit h4-
whee ldrive (4MATIC). Powe ris always trans -
mitte dto bot haxles.
!Performance test smay only be carrie dout
on a2-axl edynamometer. The brak esystem
or transfer cas ecould otherwise be damaged.
Contac t aqualified specialist workshop for a
performance test .
!Since ESP®engagesautomatically, th eigni-
tion mus tbe switched off (the SmartKey or
Start/Sto pbutto nmus tbe in position gor
1) if
Rtheelectrical parking brak eis bein gtested
usin g adynamometer
Rthevehicl eis bein gtowed wit honly on e
axl eraised (not permitte dfor vehicles wit h
4MATIC) Otherwise
,th ebrak esystem can be dam-
aged .
!Vehicles wit h4MATIC mus tno tbe towed
wit heither th efron tor th erear axl eraised, as
doin gso will damag eth etransmission .
Refueling
Important safety notes
GWARNIN G
Fue lis highly flammable. If you handle fuel
incorrectly, there is aris kof fir eand explo-
sion .
You mus tavoid fire, open flames, creating
sparks and smoking .Switc hoff th eengin e
and ,if applicable, th eauxiliary heating before
refueling.
Refueling141
Driving and parking
Z

XPressato confirm.
The Reset All Settings?function
appears.
XPress :or9 to select NoorYes.
XPress ato confirm the selection.
If you have selected Yes, the multifunction
display shows a confirmation message.
For safety reasons, the Daytime Running
Lightsfunction in theLightssubmenu is only
reset when the vehicle is stationary.
AMG menu (Mercedes-AMG vehicles)
Warm-up
:Digital speedometer
;Gear indicator
=Charge-air pressure
?Engine oil temperature
ATransmission oil temperature
XPress the òbutton on the steering wheel
to open the menu list.
XPress the :or9 button on the steering
wheel to select the AMGmenu.
XConfirm by pressing aon the steering
wheel.
Engine and transmission oil tempera-
tures: when the engine and transmission are
at normal operating temperature, oil temper-
atures ?and Aare displayed in white in the
multifunction display.
If the multifunction display shows oil temper-
ature ?orA in blue, the engine or the
transmission are not yet at normal operating
temperature. Avoid driving at full engine out-
put during this time.
Traffic Sign Assist display
XSwitch on the display function for notes and
traffic signs (Ypage 204).
XPress the òbutton on the steering wheel
to open the menu list.
XPress the :or9 button on the steering
wheel to select the AMGmenu.
XConfirm by pressing aon the steering
wheel.
XPress the 9button repeatedly until the
Traffic Sign Assist display appears.
G-Meter
While the vehicle is in motion, the G-Meter
shows the forces that are exerted on the driver
both laterally and in the direction of travel.
The maximum values are indicated in red in the
guideline system.
XPress òon the steering wheel to open the
menu list.
XPress the :or9 button on the steering
wheel to select the AMGmenu.
XConfirm by pressing aon the steering
wheel.
XPress the 9button repeatedly until the G-
Meter appears.
208Menus and submenus
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
4
CheckEngineOilAtNextRefueling
The engin eoil level has dropped to th eminimum level.
A warning tone also sounds.
!Avoid lon gjourneys wit hto olittl eengin eoil. The engin ewill oth-
erwise be damaged.
XChec kth eoil level when next refueling, at th elatest (Ypage 283).
XIf necessary, add engin eoil (Ypage 283).
If you have to ad dengin eoil frequently:
XContac t aqualified specialist workshop and hav eth eengin e
checked.
Information on approve dengin eoils can be obtained from aqualified
specialist workshop or on th eInternet at http://bevo.mercedes -
benz.co m.
4
Check Engine OilLevel(Add1quart)(USA)Check EngineOil Level (Add 1Liter)(Canada)
Mercedes-AMG C 63 vehicles:
The engine oil level has dropped to the minimum level.
!Avoid long journeys with too little engine oil. The engine will oth-
erwise be damaged.
XCheck the oil level when next refueling, at the latest (Ypage 283).
XIf necessary, add engine oil (Ypage 283).
If you have to add engine oil frequently:
XContact a qualified specialist workshop and have the engine
checked.
Information on approved engine oils can be obtained from a qualified
specialist workshop or on the Internet at http://bevo.mercedes-
benz.com.
4
Engine Oil LevelLow Stop VehicleTurn Engine Off
Mercedes-AMG C 63 vehicles:
The engine oil level is too low. There is a risk of engine damage.
XPull over and stop the vehicle safely and switch off the engine, pay-
ing attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 143).
XCheck the engine oil level (Ypage 283).
XIf necessary, add engine oil (Ypage 283).
8
Fuel Level Low
The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.
Display messages227
On-board computer and displays
Z

XReachint oth egap, pull hoo dcatch handle ;
up and lift th ehood.
If you lift th ehoo dby approximately 15 in
(40 cm), th ehoo dis opened and held open
automatically by th egas-filled strut .
Closing the hood
XLowerth ehoo dand let it fall from aheight of
approximately 8in (20 cm).
XChec kthat th ehoo dhas engage dproperly.
If th ehoo dcan be raised slightly, it is no t
properly engaged. Open it again and close it
wit h a littlemor eforce .
Radiator
Do no tcover up th eradiator, suc has wit h a
thermal mat or insec tprotection cover .Other -
wise, th evalue sof th eEuropean on-board diag-
nostics may be affected. Some of these read -
ing sare require dby law and mus tbe accurat eat
all times .
Engine oil
Important safety notes
GWARNIN G
Certain component sin th eengin ecompart-
ment, suc has th eengine, radiato rand part s
of th eexhaust system, can become ver yhot .
Workin gin th eengin ecompartmen tposes a
ris kof injury.
Wher epossible, let th eengin ecool down and
touch only th ecomponent sdescribe din th e
following.
GWARNIN G
The engin ecompartmen tcontain smoving
components. Certain components, suc has
th eradiato rfan ,may continu eto run or start
again suddenly when th eignition is off .There
is aris kof injury.
If you need to do any wor kinside th eengin e
compartment:
Rswitch off th eignition
Rnever reac hint oth earea wher ethere is a
ris kof danger from moving components,
suc has th efan rotation area
Rremove jewelr yand watches
Rkeep items of clothing and hair ,for exam-
ple, away from moving part s
GWARNING
If engin eoil comes int ocontact wit hhot com-
ponents in th eengin ecompartment, it may
ignite. There is aris kof fir eand injury.
Mak esur ethat engin eoil is no tspilled next to
th efiller neck .Let th eengin ecool down and
thoroughly clean th eengin eoil off th ecom-
ponents before starting th eengine.
GWARNIN G
Opening th ehoo dwhen th eengin eis over-
heated or when there is afir ein th eengin e
compartmen tcould expos eyou to hot gase s
or other servic eproducts .There is aris kof
injury.
Let an overheate dengin ecool down before
opening th ehood. If there is afir ein th e
engin ecompartment, keep th ehoo dclosed
and contact th efir edepartment.
General notes
Dependin gon your driving style, th evehicl e
consumes up to 0. 9US qt (0. 8l) of oil per
60 0mile s(1000 km). The oil consumption may
be higher than this when the vehicle is new or if
you frequently drive at high engine speeds.
Depending on the engine, the oil dipstick may be
in a different location.
282Engine compartment
Maintenance and care

When checking the oil level:
Rpark the vehicle on a level surface
Rthe engine should be switched off for approx-
imately five minutes if the engine is at normal
operating temperature
Rall vehicles (except Mercedes ‑AMG C 63
and Mercedes ‑AMG C 63 S):if the engine is
not at normal operating temperature, e.g. if
the engine was started only briefly, wait
approximately 30 minutes before carrying out
the measurement
Mercedes ‑AMG C 63 and Mercedes ‑AMG C
63 S: the oil level must only be checked when
the engine is at normal operating temperature.
Checking the oil level using the oil dip-
stick
Check the oil level with the oil dipstick (exam-
ple)
XPull oil dipstick :out of the dipstick guide
tube.
XWipe off oil dipstick :.
XSlowly slide dipstick :into the guide tube to
the stop, and take it out again after approx-
imately three seconds.
If the level is between MIN mark =and MAX
mark ;, the oil level is correct.
XIf the oil level has dropped to MIN mark =or
below, add 1.1 US qt (1.0 l)of engine oil.
Adding engine oil
HEnvironmental note
When adding oil, take care not to spill any. If
oil enters the soil or waterways, it is harmful to
the environment.
!Use only engine oils and oil filters that are
approved for vehicles with a service system. A list of the engine oils and oil filters that have
been tested and approved in accordance with
Mercedes-Benz Specifications for Service
Products is available at any authorized
Mercedes-Benz Center.
The following cause engine failure or damage
to the exhaust system:
RUse of engine oils and oil filters that have
not been expressly approved for the service
system
RReplacement of engine oil and oil filter after
the replacement interval specified by the
service system has expired
RUse of engine oil additives
!Do not add too much oil. adding too much
engine oil can result in damage to the engine
or to the catalytic converter. Have excess
engine oil siphoned off.
Add engine oil (example)
XTurn cap :counter-clockwise and remove it.
XAdd engine oil.
If the oil level is at or below the MIN mark on
the oil dipstick, add 1.1 US qt (1.0 l)of engine
oil.
XReplace cap :on the filler neck and tighten
clockwise.
Ensure that the cap locks into place securely.
XCheck the oil level again with the oil dipstick
(Ypage 283).
Further information on engine oil (
Ypage 342).
Engine compartment283
Maintenance and care
Z