
To start the vehicle without actively using theSmartKey:
Rthe Start/Stop button must be inserted in theignition lock.
Rthe SmartKey must be in the vehicle.
Rthe vehicle must not be locked with theSmartKey or KEYLESS-GO. (Ypage 78)
Do not keep the SmartKey:
Rwith electronic devices, e.g. a mobile phoneor 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 remotecontrol or with KEYLESS-GO, after a short time:
Ryou will not be able to switch on the ignitionwith the Start/Stop button.
Ryou will no longer be able to start the enginewith the Start/Stop button until the vehicle isunlocked again.
If you lock the vehicle centrally using the buttonon the front door (Ypage 83), you can continueto start the engine with the Start/Stop button.
The engine can be switched off while the vehicleis in motion by pressing and holding the Start/Stop button for three seconds. This functionoperates independently of the ECO start/stopautomatic engine switch-off function.
Key positions with the Start/Stop button
CStart/Stop button
DIgnition lock
As soon as the ignition is switched on, all theindicator lamps in the instrument cluster lightup. Warning and indicator lamps: see(Ypage 256).
If Start/Stop button Chas not yet beenpressed, this corresponds to the SmartKeybeing removed from the ignition.
XTo switch on the power supply:pressStart/Stop button Conce.The power supply is switched on. You can nowactivate 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 Ctwice when inthis position
XTo switch on the ignition:press Start/Stopbutton Ctwice.The ignition is switched on.
The ignition is switched off again if:
Ryou do not start the engine from this positionwithin 15 minutes
Ryou press Start/Stop button Conce when inthis position
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop button Conce when inthis position
Removing the Start/Stop button
You can remove the Start/Stop button from theignition lock and start the vehicle as normalusing the SmartKey.
It is possible to switch between Start/Stop but-ton mode and key operation only when thetransmission is in position ].
XRemove Start/Stop button Cfrom ignitionlock D.
You do not have to remove the Start/Stop but-ton from the ignition lock when you leave thevehicle. You should, however, always take theSmartKey with you when leaving the vehicle. Aslong as the SmartKey is in the vehicle:
Rthe vehicle can be started using the Start/Stop button
Rthe electrically powered equipment can beoperated
132Driving
Driving and parking

Engine compartment
Hood
Important safety notes
GWARNING
If the hood is unlatched, it may open up when
the vehicle is in motion and block your view.
There is a risk of an accident.
Never unlatch the hood while driving. Before
every trip, ensure that the hood is locked.
GWARNING
When opening and closing the hood, it may
suddenly fall into the closed position. There is
a risk of injury to persons within range of
movement of the hood.
Open and close the hood only when no one is
within its range of movement.
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.
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
To ensure the flow of fresh air through the airvents into the vehicle interior, please observethe following notes (Ypage 128):
Opening the hood
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
GWARNING
When the hood is open and the windshield
wipers are set in motion, you can be injured by
the wiper linkage. There is a risk of injury.
Always switch off the windshield wipers and
the ignition before opening the hood.
!Make sure that the windshield wipers arenot folded away from the windshield. Youcould otherwise damage the windshield wip-ers or the hood.
XMake sure that the windshield wipers areturned off.
XPull release lever Con the hood.The hood is released.
Engine compartment299
Maintenance and care
Z

Cleaning the vehicle parts
Cleaning the wheels
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.
!Do not use acidic wheel cleaning productsto remove brake dust. This could damagewheel bolts and brake components.
!Do not park your vehicle for a long period oftime directly after cleaning, particularly aftercleaning the wheel rim with wheel cleaner.Wheel cleaner can lead to the increased cor-rosion of the brake discs and pads. Therefore,drive for a few minutes after cleaning. Byheating up the brakes, the brake discs andpads dry. The vehicle can then be parked for along period of time.
Cleaning the windows
GWARNING
You could become trapped by the windshield
wipers if they start moving while cleaning the
windshield or wiper blades. There is a risk of
injury.
Always switch off the windshield wipers and
the ignition before cleaning the windshield or
wiper blades.
!Do not use dry cloths, abrasive products,solvents or cleaning agents containing sol-vents to clean the inside of the windows. Donot touch the insides of the windows withhard objects, e.g. an ice scraper or ring. Thereis otherwise a risk of damaging the windows.
!Clean the water drainage channels of thewindshield and the rear window at regularintervals. Deposits such as leaves, petals andpollen may under certain circumstances pre-vent water from draining away. This can lead
to corrosion damage and damage to elec-tronic components.
XClean the inside and outside of the windowswith a damp cloth and a cleaning product thatis recommended and approved by Mercedes-Benz.
Cleaning wiper blades
GWARNING
You could become trapped by the windshield
wipers if they start moving while cleaning the
windshield or wiper blades. There is a risk of
injury.
Always switch off the windshield wipers and
the ignition before cleaning the windshield or
wiper blades.
!Do not pull the wiper blade. Otherwise, thewiper blade could be damaged.
!Do not clean wiper blades too often and donot rub them too hard. Otherwise, the graph-ite coating could be damaged. This couldcause wiper noise.
!Hold the wiper arm securely when foldingback. The windshield could be damaged if thewiper arm smacks against it suddenly.
XMove the wiper arms to a vertical position(Ypage 116) and fold away from the wind-shield.
XCarefully clean the wiper blades with a dampcloth.
XFold the windshield wiper arms back againbefore switching on the ignition.
Cleaning the exterior lighting
!Only use cleaning agents or cleaning clothswhich are suitable for plastic light lenses.Unsuitable cleaning agents or cleaning clothscould scratch or damage the plastic light len-ses.
XClean the plastic lenses of the exterior light-ing using a wet sponge and a mild cleaningagent, e.g. Mercedes-Benz car shampoo orcleaning cloths.
308Care
Maintenance and care

Dashboard fuse box
The fuse box is under a cover on the side of thedashboard. You can obtain further informationfrom an authorized Mercedes-Benz Center.
Fuse box in the front passenger foot-
well
XOpen the front-passenger door.
XTo open:fold cover Cout towards the rearand remove it.
XTo close:clip in cover Cat the rear.
XFold cover Cforwards until it engages.
Fuse box in the engine compartment
GWARNING
When the hood is open and the windshield
wipers are set in motion, you can be injured by
the wiper linkage. There is a risk of injury.
Always switch off the windshield wipers and
the ignition before opening the hood.
XOpen the hood (Ypage 299).
XTo open:turn fasteners Don cover Ccoun-ter-clockwise as far as they will go.
XRemove fuse box cover Cup.
XUse a dry cloth to remove any moisture fromthe fuse box.
XLoosen screws