
Where possible, let the engine cool down andtouch only the components described in the
following.
GWARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There is a risk of injury.
If you need to do any work inside the engine
compartment:
Rswitch off the ignition
Rnever reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from moving parts
GWARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is a risk of injury.
Let the engine cool down before you open the
cap. Wear gloves and eye protection. Slowly
open the cap to relieve pressure.
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
Checking coolant level
Checking the coolant level (example)
XPark the vehicle on a level surface.
Only check the coolant level when the vehicle
is on a level surface and the engine has cooled
down.
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 132).
or
XPress the Start/Stop button twice on vehicles
with KEYLESS-GO or the KEYLESS-GO start
function (
Ypage 133).
XCheck the coolant temperature display in the
instrument cluster (Ypage 36).
The coolant temperature must be below
158 ‡ (70 †).
XTurn the SmartKey to position gin the igni-
tion lock (Ypage 132).
or
XPress the Start/Stop button once on vehicles with KEYLESS-GO or the KEYLESS-GO start
function (
Ypage 133).
XSlowly turn cap :half a turn counter-clock-
wise and allow excess pressure to escape.
XTurn cap :further counter-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 0.6 in
(1.5 cm) above marker bar =in the filler neck
when warm, there is enough coolant in expan-
sion tank ;.
XIf necessary, add coolant that has been tested
and approved by Mercedes-Benz.
XReplace cap :and turn it clockwise as far as
it will go.
For further information on coolant, see
(
Ypage 368).
Engine compartment309
Maintenance and care
Z 

To avoid damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or similar situations:
Rwhen towing the vehicle
Rin the car wash
!Never clean your vehicle in a Touchless
Automatic Car Wash as these use special
cleaning agents. These cleaning agents can
damage the paintwork or plastic parts.
!Make sure that:
Rthe side windows and sliding sunroof are
closed completely
Rthe blower is switched off
Rthe windshield wiper switch is in position 0
Rthe 360° camera or the rear view camera is
deactivated
The vehicle may otherwise be damaged.
!If the SmartKey is within the rear detection
range of KEYLESS-GO, the following situa-
tions, for example, could lead to the uninten-
tional opening of the tailgate:
Rusing a car wash
Rusing a power washer
Make sure that the SmartKey is at least 3 m
away from the vehicle.
!If the SmartKey is within the rear detection
range of KEYLESS-GO, the following situa-
tions, for example, could lead to the uninten-
tional opening of the tailgate:
Rusing a car wash
Rusing a power washer
Make sure that the SmartKey is at least 10 ft (3 m) away from the vehicle.
!Make sure that the automatic transmission
is in neutral position iwhen washing your
vehicle in a tow-through car wash. The vehicle
may otherwise be damaged.
ROperating with the SmartKey:
Do not remove the SmartKey from the igni-
tion lock. Do not open the driver's door
when the engine is switched off or at very
low speeds. Otherwise, when in transmis-
sion position hork, the automatic
transmission will automatically switch to
park position jand block the wheels.
ROperating 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
hork, the automatic transmis-
sion will automatically switch to park posi-
tion jand block the wheels.
Observe the following to make sure that the
automatic transmission stays in neutral position
i:
Operating with the SmartKey and Start/Stop
button:
XMake sure that the ignition is switched on.
XMake sure that the vehicle is stationary.
XDepress and hold the brake pedal.
Operating with the Start/Stop button only:
XEngage park position j.
XRelease the brake pedal.
XRemove Start/Stop button from ignition lock
(Ypage 133).
XInsert the SmartKey into the ignition lock.
XSwitch on the ignition.
XDepress and hold the brake pedal.
Operating with the SmartKey and Start/Stop
button:
XShift to neutral i.
XRelease the brake pedal.
XRelease the electric parking brake, if neces-
sary.
XSwitch off the ignition and leave the SmartKey
in the ignition lock.
You can wash the vehicle in an automatic car
wash from the very start.
If the vehicle is very dirty, pre-wash it before
cleaning it in an automatic car wash.
After using an automatic car wash, wipe off wax
from the windshield and the wiper blades. This
will prevent smears and reduce wiping noises
caused by residue on the windshield.
Washing by hand
In some countries, washing by hand is only
allowed at specially equipped washing bays.
Observe the legal requirements in each country.
XDo not use hot water and do not wash the
vehicle in direct sunlight.
XUse a soft sponge to clean.
XUse a mild cleaning agent, such as a car
shampoo approved by Mercedes-Benz.
312Care
Maintenance and care 

XThoroughly hose down the vehicle with a gen-
tle jet of water.
XDo not point the water jet directly towards the
air inlet.
XUse plenty of water and rinse out the sponge
frequently.
XRinse the vehicle with clean water and dry
thoroughly with a chamois.
XDo not let the cleaning agent dry on the paint-work.
Carefully remove all deposits of road salt as
soon as possible when driving in winter.
Power washers
GWARNING
The water jet from a circular jet nozzle (dirt
blasters) can cause invisible exterior damage
to the tires or chassis components. Compo-
nents damaged in this way may fail unexpect-
edly. There is a risk of an accident.
Do not use power washers with circular jet
nozzles to clean the vehicle. Have damaged
tires or chassis components replaced imme-
diately.
!Always maintain a distance of at least
11.8 in (30 cm) between the vehicle and the
power washer nozzle. Information about the
correct distance is available from the equip-
ment manufacturer.
Move the power washer nozzle around when
cleaning your vehicle.
Do not aim directly at any of the following:
RTires
RDoor gaps, roof gaps, joints, etc.
RElectrical components
RBattery
RConnectors
RLamps
RSeals
RTrim
RVentilation slots
Damaged seals or electrical components can
lead to leaks or failures.
!Vehicles with decorative film: parts of your
vehicle are covered with a decorative film.
Maintain a distance of at least 27.5 in (70 cm) between the parts of the vehicle covered with
the film and the nozzle of the high pressure
cleaner.
Information about the correct distance is
available from the equipment manufacturer.
Move the power washer nozzle around when
cleaning your vehicle.
!If the SmartKey is within the rear detection
range of KEYLESS-GO, the following situa-
tions, for example, could lead to the uninten-
tional opening of the tailgate:
Rusing a car wash
Rusing a power washer
Make sure that the SmartKey is at least 3 m
away from the vehicle.
!If the SmartKey is within the rear detection
range of KEYLESS-GO, the following situa-
tions, for example, could lead to the uninten-
tional opening of the tailgate:
Rusing a car wash
Rusing a power washer
Make sure that the SmartKey is at least 10 ft
(3 m) away from the vehicle.
Cleaning the paintwork
!Do not affix:
Rstickers
Rfilms
Rmagnetic plates or similar items
to painted surfaces. You could otherwise
damage the paintwork.
Scratches, corrosive deposits, areas affected by
corrosion and damage caused by inadequate
care cannot always be completely repaired. In
such cases, visit a qualified specialist workshop.
XRemove dirt immediately, where possible,
while avoiding rubbing too hard.
XSoak insect remains with insect remover and
rinse off the treated areas afterwards.
XSoak bird droppings with water and rinse off
the treated areas afterwards.
XRemove coolant, brake fluid, tree resin, oils,
fuels and greases by rubbing gently with a
cloth soaked in petroleum ether or lighter
fluid.
XUse tar remover to remove tar stains.
XUse silicone remover to remove wax.
Care313
Maintenance and care
Z 

Cleaning the rear view camera and 360°
camera
!Do not clean the camera lens and the area
around the rear view camera or 360° camera
with a power washer.
XMake sure that the vehicle is stationary.
XTurn the SmartKey to position 1or2 in the
ignition lock (Ypage 132).
or
XPress the Start/Stop button once or twice on
vehicles with KEYLESS-GO or the KEYLESS-
GO start function (
Ypage 133).
XOpen the camera cover for cleaning via the
multimedia system (see Digital Operator's
Manual).
XTo clean the camera: use clean water and a
soft cloth to clean camera lens :.
When you switch off the ignition, the camera
cover closes automatically.
Cleaning the exhaust pipes
GWARNING
The exhaust tail pipe and tail pipe trim can
become very hot. If you come into contact
with these parts of the vehicle, you could burn
yourself. There is a risk of injury.
Always be particularly careful around the
exhaust tail pipe and the tail pipe trim. Allow
these components to cool down before touch-
ing them.
!Do not clean the exhaust pipe with acid-
based cleaning agents, such as bathroom
cleaner or wheel cleaner.
Impurities combined with the effects of road grit and corrosive environmental factors may cause flash rust to form on the surface. You can
restore the original shine of the exhaust pipe by
cleaning it regularly, especially in winter and
after washing.
XClean the exhaust pipe with a care product
tested and approved by Mercedes-Benz.
Cleaning the trailer tow hitch
HEnvironmental note
Dispose of rags soaked in oil and grease in an
environmentally responsible manner.
!Please note the care instructions in the
trailer coupling manufacturer's operating
instructions.
The ball coupling must be cleaned if it becomes dirty or corroded.
XRemove rust on the ball, e.g. with a wire
brush.
XRemove dirt with a clean, lint-free cloth or a
brush.
XAfter cleaning, lightly oil or grease the ball
coupling.
XCheck that the vehicle's trailer tow hitch is
working properly.
You can also have the maintenance work on the ball coupling and the trailer tow hitch carried out
by a qualified specialist workshop.
Interior care
Cleaning the display
!For cleaning, do not use any of the following:
Ralcohol-based thinner or gasoline
Rabrasive cleaning agents
Rcommercially-available household cleaning
agents
These may damage the display surface. Do
not put pressure on the display surface when cleaning. This could lead to irreparable dam-
age to the display.
316Care
Maintenance and care 

Flat tire
Preparing the vehicle
Your vehiclemay be equipped with:
RMOExtended tires (tires wit hrun-flat proper -
ties) (Ypage 321)
Vehicl epreparation is no tnecessar yon vehi-
cle swit hMOExtended tires
RaTIREFI Tkit (Ypage 320)
Vehicles equipped wit hMOExtended tires are
no tequipped wit h aTIREFI Tkit at th efactory. It
is therefor erecommended that you additionally
equip your vehicl ewit h a TIREFI Tkit if you moun t
tires that do no tfeature run-flat properties, e.g.
winte rtires . ATIREFI Tkit may be obtained from
a qualified specialist workshop.
Information on changing and mounting wheels
(
Ypage 357).
XStop th evehicl eon solid, non-slippery and
leve lground ,as far away as possible from
traffic.
XSwitc hon th ehazard warning lamps.
XSecur eth evehicl eagainst rollin gaway
(Ypage 154).
XIf possible ,brin gth efron twheels int oth e
straight-ahead position .
XSwitchoff th eengine.
XRemove th eSmartKey from th eignition lock.
or, in vehicles wit hKEYLESS-GO start-function
or KEYLESS‑ GO
XOpen thedriver' sdoor .
The vehicl eelectronics are no win position
u. This means: "Key removed".
XRemove th eStart/Sto pbutto nfrom th eigni-
ti on loc k (Ypage 133).
XMakesure that th eengin ecanno tbe started
via your smartphon e (Ypage 134).
XMakesure that th epassenger sare no tendan -
gered as they do so. Mak esure that no on eis
near th edanger area while awhee lis bein g
changed. Anyon ewho is no tdirectly assisting
in th ewhee lchang eshould, for example ,
stand behind th ebarrier.
XGet out of th evehicle. Pay attention to traffic
condition swhen doin gso.
XClose th edriver' sdoor .
Vehicles with MOExtended tires (tires
with run-flat characteristics)
General notes
Wit hMOExtended tires (tires wit hrun flat char-
acteristics), you can continue to driv eyour vehi-
cle eve nif there is atotal loss of pressur ein on e
or mor etires .The affected tire must no tsho w
any clearly visible damage.
You can recognize aMOExtended tire by th e
MOExtended markin gwhic happear son th e
sidewall of th etire. You will fin dthis markin g
next to th etire siz edesignation ,th eload-bear -
ing capacit yand th espee dindex (
Ypage 351).
MOExtended tires may only be used in conjunc -
tion wit han active tire pressur eloss warning
system or wit han active tire pressur emonitor.
If apressure loss warning messag eappears
in th emultifunction display:
Robserv eth einstruction sin th edisplay mes -
sage s (Ypage 250).
Rcheck th etire for damag e
Rif driving on,observ eth efollowin gnote s
The driving distanc epossible in run-flat mod eis
approximately 50 mile s(80 km) when th evehi-
cle is partially laden .When th evehicl eis fully
laden it is approximately 19 mile s(30 km).
In addition to th evehicl eload, th edriving dis-
tance possible depend supon :
RVehicl espee d
RRoad condition
ROutside temperature
The driving distanc epossible in run-flat mod e
may be reduce dby extreme driv ing condi
tion
s
or maneuvers, or it can be increased throug h a
moderat estyle of driving .
The driving distanc epossible in run-flat mod eis
counted from th emomen tth etire pressur eloss
warning appear sin th emultifunction display.
You must no texcee d amaximum permissible
spee dof 50 mph (80 km/h).
When replacing on eor all tires ,pleas eobserv e
th efollowin gspecification sfor your vehicle's
tires :
Rsize
Rthetyp eand
Rth e"MOExtended" markin g
If atire has gon eflat and canno tbe replace d
wit h a MOExtended tire, astandard tire may be
used as atemporar ymeasure. Mak esure that
Flat tire321
Breakdown assistance 

the tires are installed corresponding to the
direction of rotation.
An arrow on the sidewall of the tire indicates its
correct direction of rotation.
Storing wheels
Store wheels that are not being used in a cool,
dry and preferably dark place. Protect the tires
from oil, grease, gasoline and diesel.
Mounting a wheel
Preparing the vehicle
XStop the vehicle on solid, non-slippery and
level ground.
XApply the electric parking brake manually.
XBring the front wheels into the straight-ahead position.
XShift the transmission to position j.
XMake sure that the vehicle level is set to "Nor-
mal" on vehicles with AIR BODY CONTROL
(
Ypage 173).
XSwitch off the engine.
XVehicles without KEYLESS-GO:remove the
SmartKey from the ignition lock.
XVehicles with KEYLESS-GO start-function
or KEYLESS-GO: open the driver's door.
The vehicle electronics are now in key posi-
tion u. This is the same as the key having
been removed.
XVehicles with KEYLESS-GO start-function
or KEYLESS-GO: remove the Start/Stop but-
ton from the ignition lock (
Ypage 133).
XMake sure that the engine cannot be started
via your smartphone (Ypage 134).
XIf included in the vehicle equipment, remove
the tire-change tool kit from the vehicle.
XSafeguard the vehicle against rolling away.
Securing the vehicle to prevent it from
rolling away
If your vehicle is equipped with a wheel chock, it
can be found in the tire-change tool kit
(
Ypage 320).
The folding wheel chock is an additional safety
measure to prevent the vehicle from rolling
away, for example when changing a wheel.
XFold both plates upwards :.
XFold out lower plate;.
XGuide the lugs on the lower plate fully into the
openings in base plate =.
XPlace chocks or other suitable items under
the front and rear of the wheel that is diago-
nally opposite the wheel you wish to change.
Raising the vehicle
GWARNING
If you do not position the jack correctly at the
appropriate jacking point of the vehicle, the
jack could tip over with the vehicle raised.
There is a risk of injury.
Only position the jack at the appropriate jack-
ing point of the vehicle. The base of the jack
Changing a wheel357
Wheels an d tires
Z