2015 MERCEDES-BENZ S-CLASS COUPE maintenance

Closing the bonnet
X
Lower the bonnet and let it fall from a
height of approximately 20 cm.
X Check that the bonnet has engaged prop-
erly.
If the bonnet can be raised slightly, it is not
properly engaged. Open it again and close
it with a little more force. Radiator
Do not cover up the radiator. Do not use ther-
mal mats, insect protection covers or any-
thing similar. Doing so can cause the Onboard Diagnostics System to display inaccurate val-
ues. Some of these values are legally required
and must always be correct. Engine oil
General notes Depending on your driving style, the vehicle
consumes up to 0.8 litres of oil per 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 installed at a different location.
When checking the oil level:
R park the vehicle on a level surface
R the engine should be switched off for
approximately five minutes if the engine is
at normal operating temperature
R if the engine is not at normal operating
temperature, e.g. if the engine was only
started briefly, wait approximately
30 minutes before carrying out the meas-
urement Checking the oil level using the oil dip-
stick (except Mercedes-AMG S 65 mod-
els) G
WARNING
Certain components in the engine compart-
ment could be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
There is a risk of injury when accessing the
engine compartment.
As far as possible, allow the engine to cool
down and only touch the components descri- bed in the following. Example
X Pull oil dipstick :out of the oil dipstick
tube.
X Wipe off oil dipstick :.
X Slowly slide oil dipstick :into the guide
tube to the stop, and take it out again.
If the level is between MIN mark =and
MAX mark ;, the oil level is correct.
X If the oil level has dropped to MIN mark =
or below, top up with 1.0 l of engine oil. 340
Engine compartmentMaintenance and care

Checking the oil level using the on-board computer (Mercedes-AMG S 65 models)
X
Make sure that the key is in position 2in the ignition lock.
X Use ò on the steering wheel to call up the list of menus.
X Press the :or9 button on the steering wheel to select the Service
Servicemenu.
X Confirm by pressing aon the steering wheel.
X Use : or9 to select the Engine oil level:
Engine oil level: submenu.
X Press ato confirm the selection.
The Engine
Engine oil
oillevel
level Measuring
Measuring now
nowMeasurement
Measurement accurate
accurateonly
onlyif
ifvehicle
vehicle is
is
level
level message appears in the multifunction display.
The measurement takes a few seconds. You will see one of the following messages in the
multifunction display: Display messages
Possible causes/consequences and
M
MSolutions Engine
Engine
oil
oillevel
level OK
OK The oil level is correct.
Add
Add
1
1litre
litre engine
engine
oil
oil when
when next
next refu‐
refu‐
elling
elling The oil level is too low.
X Top up 1.0 litre of engine oil. Engine oil level
Engine oil level
Reduce oil level Reduce oil level The engine oil level is too high.
X Have excess engine oil siphoned off. For engine oil
For engine oil
level level
turn
turnon
onigni‐
igni‐
tion
tion The ignition is switched off.
X Turn the key to position 2in the ignition lock. Waiting
Waiting
period
periodfor
for
engine oil level
engine oil level
not observed not observed The required waiting period was not observed.
X If the engine is at normal operating temperature: repeat the
measurement after about five minutes.
If the engine is not at normal operating temperature, e.g. if the
engine was only started briefly: repeat the measurement after
approximately 30 minutes. Engine oil level Engine oil level
Not with the Not with the
engine running engine running The engine is running; oil level measurement is not possible.
X Switch off the engine.
X If the engine is at normal operating temperature: wait about five
minutes before carrying out the measurement.
If the engine is not at normal operating temperature, e.g. if theengine was only started briefly: wait approximately 30 minutes before carrying out the measurement. Engine compartment
341Maintenance and care Z

Adding engine oil
G
WARNING
Certain components in the engine compart-
ment could be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
There is a risk of injury when accessing the
engine compartment.
As far as possible, allow the engine to cool
down and only touch the components descri- bed in the following. G
WARNING
If engine oil comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Make sure that engine oil does not spill out
over the filler neck. Allow the engine to cool
down and thoroughly clean the components
that have come into contact with engine oil
before you start the engine. H
Environmental note
When topping up the oil, take care not to spill
any. If oil enters the soil or waterways, it is
harmful to the environment.
! Only use engine oils and oil filters that
have been approved for vehicles with a ser-
vice system. You can obtain a list of the
engine oils and oil filters tested and
approved in accordance with the
Mercedes-Benz Specifications for Service
Products at any Mercedes-Benz Service
Centre.
Damage to the engine or exhaust system is caused by the following:
R using engine oils and oil filters that have
not been specifically approved for the
service system
R changing the engine oil and oil filter after
missing the change interval required by
the service system
R using engine oil additives
! Do not add too much oil. Topping up with
too much engine oil can result in damage to the engine or to the catalytic converter.
Have excess engine oil siphoned off.
Example
X Turn cap :anti-clockwise and remove it.
X Top up the engine oil.
If the oil level is at or below the MIN mark on
the oil dipstick, top up with 1.0 litre of
engine oil.
X Replace cap :on the filler neck and
tighten clockwise.
Make sure that the cap locks securely into place.
X Check the oil level again with the oil dip-
stick (Y page 340).
For further information on engine oil, see
(Y page 407). Other service products
Checking the coolant level G
WARNING
Certain components in the engine compart-
ment could be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
There is a risk of injury when accessing the
engine compartment.
As far as possible, allow the engine to cool
down and only touch the components descri- bed in the following. G
WARNING
The engine cooling system is under pressure, particularly if the engine is warm. You could 342
Engine compartmentMaintenance and care

be scalded by hot coolant spraying out when
opening the cap. There is a danger of injury.
Allow the engine to cool before opening the
cap. Wear gloves and protective eyewear
when opening. Slowly turn the cap half a turn to allow pressure to escape. X
Park the vehicle on a level surface.
Only check the coolant level if the vehicle is on a level surface and the engine has
cooled down.
X Turn the key to position 2in the ignition
lock (Y page 161).
or
X Press the Start/Stop button twice
(Y page 161).
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
70 †.
X Turn the key to position 0in the ignition
lock (Y page 161).
or
X Remove the Start/Stop button from the
ignition lock (Y page 161).
X Slowly turn cap :half a turn anti-clock-
wise and allow excess pressure to escape.
X Turn cap :further anti-clockwise and
remove it.
If the coolant is at the level of marker bar =
in the filler neck when cold, there is enough
coolant in coolant expansion tank ;.
If the coolant level is approximately 1.5 cm above marker bar =in the filler neck when warm, there is enough coolant in coolant
expansion tank
;.
X If necessary, top up with coolant that has
been tested and approved by Mercedes-
Benz.
X Replace cap :and turn it clockwise as far
as it will go.
For further information on coolant, see
(Y page 409).
Topping up the windscreen washer sys-
tem G
WARNING
Certain components in the engine compart-
ment could be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
There is a risk of injury when accessing the
engine compartment.
As far as possible, allow the engine to cool
down and only touch the components descri- bed in the following. G
WARNING
If windscreen washer concentrate comes into contact with hot components of the engine or
the exhaust system, it can ignite. There is a
risk of fire and injury.
Make sure the windscreen washer concen-
trate does not come into contact with the filler neck. X
To open: pull cap:upwards by the tab.
X Place cap :on the edge of the filler neck
and engage in place. Engine compartment
343Maintenance and care Z

X
Top up with the premixed washer fluid.
X To close: press cap :onto the filler neck
until it engages.
If the washer fluid level drops below the rec-
ommended minimum of 1 litre, a message
appears in the multifunction display prompt-
ing you to top up the washer fluid
(Y page 300).
Further information on windscreen washer
fluid/antifreeze (Y page 409).ASSYST PLUS
Service message
The ASSYST PLUS service interval display
informs you of the next service due date.
Information on the type of service and service
intervals (see the separate Service Booklet).
You can obtain further information from a
Mercedes-Benz Service Centre.
i The ASSYST PLUS service interval display
does not show any information on the
engine oil level. Observe the notes on the
engine oil level (Y page 340).
The multifunction display shows a service
message for a few seconds, e.g.:
R Service A in .. days
Service A in .. days
R Service A due Service A due
R Service A overdue by .. days
Service A overdue by .. days
Depending on the operating conditions of the vehicle, the remaining time or distance until
the next service due date is displayed.
The letter indicates which service is due. A
A
stands for a minor service and B
B for a major
service. A number or another letter may be
displayed after the letter.
Only for certain countries: the position after
the letter A
A or B Bindicates any necessary addi-
tional maintenance work to be performed. If
you notify a qualified specialist workshop of
this display, you will receive a statement on
the associated costs. The ASSYST PLUS service interval display
does not take into account any periods of
time during which the battery is disconnec-
ted.
Maintaining the time-dependent service
schedule:
X Note down the service due date displayed
in the multifunction display before discon-
necting the battery.
or X After reconnecting the battery, subtract
the battery disconnection periods from the
service date shown on the display. Hiding service messages
X Press the aor% button on the steer-
ing wheel. Displaying service messages
X Switch the ignition on.
X Use ò on the steering wheel to call up
the list of menus.
X Press the 9or: button on the steer-
ing wheel to select the Service Servicemenu and
press ato confirm.
X Press the 9or: button on the steer-
ing wheel to select the ASSYST PLUS
ASSYST PLUSsub-
menu and press ato confirm.
The service due date appears in the multi-
function display. Information about Service
Resetting the ASSYST PLUS service
interval display !
If the ASSYST PLUS service interval dis-
play has been inadvertently reset, this set-
ting can be corrected at a qualified special-
ist workshop.
Have service work carried out as described in the Service Booklet. This may otherwise 344
ASSYST PLUSMaintenance and care

lead to increased wear and damage to the
major assemblies or the vehicle.
A qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre, will reset the ASSYST PLUS service interval display after
the service work has been carried out. You
can also obtain further information on main-
tenance work, for example.
Special service requirements The prescribed service interval is based on
normal operation of the vehicle. Service work
will need to be performed more often if the
vehicle is operated under arduous conditions
or increased loads, for example:
R regular city driving with frequent intermedi-
ate stops
R if the vehicle is primarily used to travel
short distances
R for frequent operation in mountainous ter-
rain or on poor road surfaces
R if the engine is often left idling for long peri-
ods
In these or similar operating conditions, have,
for example, the air filter, engine oil and oil
filter changed more frequently. The tyres
must be checked more frequently if the vehi-
cle is operated under increased loads. Fur-
ther information can be obtained at a quali-
fied specialist workshop, e.g. a Mercedes-
Benz Service Centre.
Driving abroad An extensive Mercedes-Benz Service network
is also available in other countries. You can
obtain further information from any
Mercedes-Benz Service Centre. Care
General notes
H
Environmental note
Dispose of empty packaging and cleaning
cloths in an environmentally responsible man- ner.
! For cleaning your vehicle, do not use any
of the following:
R dry, rough or hard cloths
R abrasive cleaning agents
R solvents
R cleaning agents containing solvents
Do not scrub.
Do not touch the surfaces or protective
films with hard objects, e.g. a ring or ice
scraper. You could otherwise scratch or
damage the surfaces and protective film.
! Do not park up the vehicle for an extended
period straight after cleaning it, particularly after having cleaned the wheels with wheel cleaner. Wheel cleaners could cause
increased corrosion of the brake discs and
brake pads/linings. For this reason, you
should drive for a few minutes after clean-
ing. Braking heats the brake discs and the
brake pads/linings, thus drying them. The
vehicle can then be parked up.
Regular care of your vehicle is a condition for
retaining the quality in the long term.
Use care products and cleaning agents rec-
ommended and approved by Mercedes-Benz. Washing the vehicle and cleaning the
paintwork
Automatic car wash G
WARNING
Braking efficiency is reduced after the vehicle has been washed. There is a risk of an acci-
dent. Care
345Maintenance and care
Z

After washing the vehicle, brake carefully
while paying attention to the traffic conditions in order to restore full braking efficiency.
! When DISTRONIC PLUS or the HOLD
function is activated, the vehicle brakes
automatically in certain situations.
To avoid damage to the vehicle, deactivate DISTRONIC PLUS and the HOLD function in the following or similar situations:
R when towing away
R in a car wash
! Make sure:
R the side windows are closed completely.
R the blower for the ventilation/heating is
switched off (OFF button is depressed).
R the windscreen wiper switch is at posi-
tion 0.
R the 360° camera or reversing camera is
switched off.
The vehicle could otherwise be damaged.
! If the key is within the rear detection
range of KEYLESS-GO, the following situa-
tions, for example, could lead to the boot lid opening unintentionally:
R using a car wash
R using a high-pressure cleaner
Make sure that the key is at least 3 m away from the vehicle.
! Make sure that the automatic transmis-
sion is in neutral position Nwhen washing
your vehicle in a tow-through car wash. The
vehicle may otherwise be damaged.
R Operating with the key:
Do not remove the key from the ignition
lock. Do not open the driver's door when
the engine is switched off or at very low
speeds. Otherwise, when in transmission position Dor Rthe automatic transmis-
sion will automatically switch to park
position Pand block the wheels.
R Operating with the Start/Stop button: Do not open the driver's door when the
engine is switched off or at very low
speeds. Otherwise, when in transmission
position Dor Rthe automatic transmis-
sion will automatically switch to park
position Pand block the wheels.
Observe the following to make sure that the
automatic transmission stays in neutral posi-
tion N:
Operating with the key:
X Make sure the ignition is switched on.
X Make sure that the vehicle is stationary.
X Depress the brake pedal and keep it
depressed.
X Select neutral N.
X Release the brake pedal.
X Release the electric parking brake, if nec-
essary.
X Switch off the ignition and leave the key in
the ignition lock.
Operating with the Start/Stop button:
X Make sure the ignition is switched on.
X Make sure that the vehicle is stationary.
X Depress the brake pedal and keep it
depressed.
X Engage park position P.
X Release the brake pedal.
X Remove the Start/Stop button from the
ignition lock (Y page 161).
X Insert the key into the ignition lock.
X Switch on the ignition.
X Depress the brake pedal and keep it
depressed.
X Select neutral N.
X Release the brake pedal.
X Release the electric parking brake, if nec-
essary.
X Switch off the ignition and leave the key in
the ignition lock.
You can wash the vehicle in an automatic car
wash from the very start. 346
CareMaintenance and care

Wash off excess dirt before cleaning the vehi-
cle in an automatic car wash.
After using an automatic car wash, wipe off
wax from the windscreen and the wiper
blades. This will prevent smears and reduce
wiping noises caused by residue on the wind- screen.
Washing by hand In some countries, washing by hand is only
allowed at specially equipped washing bays.
Observe the legal requirements for each indi- vidual country.
X Do not use hot water and do not wash the
vehicle in direct sunlight.
X Use a soft sponge to clean.
X Use a mild cleaning agent, such as a car
shampoo approved by Mercedes-Benz.
X Thoroughly hose down the vehicle with a
gentle jet of water.
X Do not point the water jet directly towards
the air inlet.
X Use plenty of water and rinse out the
sponge frequently.
X Rinse the vehicle with clean water and dry
thoroughly with a chamois.
X Do not let the cleaning agent dry on the
paintwork.
When using the vehicle in winter, remove all
traces of road salt deposits carefully and as
soon as possible.
High-pressure cleaning equipment G
WARNING
The water jet of circular-jet nozzles (dirt grind- ers) can cause damage not visible from the
outside to tyres or chassis components. Com-
ponents damaged in this way can unexpect-
edly fail. There is a risk of an accident.
Do not use high-pressure cleaners with circu-
lar-jet nozzles to clean the vehicle. Have dam- aged tyres or chassis components replaced
immediately. !
Always maintain a distance of at least
30 cm between the vehicle and the high-
pressure cleaner nozzle. Information about
the correct distance is available from the
equipment manufacturer.
Move the high-pressure cleaner nozzle
around when cleaning your vehicle.
Do not aim directly at any of the following:
R tyres
R door gaps, roof gaps, joints etc.
R electrical components
R battery
R connectors
R lights
R seals
R trim elements
R ventilation slots
Damaged seals or electrical components
can lead to leaks or failures.
! If the key is within the rear detection
range of KEYLESS-GO, the following situa-
tions, for example, could lead to the boot lid opening unintentionally:
R using a car wash
R using a high-pressure cleaner
Make sure that the key is at least 3 m away
from the vehicle.
Cleaning the paintwork !
Do not affix:
R stickers
R films
R magnetic plates or similar items
to painted surfaces. You could otherwise
damage the paintwork.
Scratches, corrosive deposits, areas affected by corrosion and damage caused by inade-
quate care cannot always be completely
repaired. In such cases, visit a qualified spe-
cialist workshop. Care
347Maintenance and care Z