Page 297 of 373

Problem
Possible causes/consequences and
X XSolutions Only the red segments
in the PARKTRONIC
warning display are lit.
PARKTRONIC is deacti-
vated after approx-
imately 20 seconds. The problem may be caused by an external source of radio or
ultrasound waves.
X
See if PARKTRONIC functions in a different location. Night View Assist Plus*
Problem
Possible causes/consequences and
X XSolutions The picture quality of
Night View Assist Plus
has deteriorated. The windscreen wipers are smearing the windscreen.
X
Replace the wiper blades (Y page 308). The windscreen is smeared after cleaning the vehicle in a car wash.
X
Clean the windscreen (Y page 242). Windscreen chip damage in the camera's field of vision.
X
Replace the windscreen. The windscreen is misted up on the inside.
X
Demist the windscreen (Y page 179). The windscreen is iced up.
X
De-ice the windscreen (Y page 179). There is dirt on the inside of the windscreen.
X
Clean the inside of the windscreen (Y page 242).Headlamps
Problem
Possible causes/consequences and
X XSolutions The headlamps are mis-
ted up on the inside. Air humidity is very high.
X
Drive with the headlamps switched on.
The headlamps are demisted after a short distance. The headlamp housing is not sealed and moisture has been able
to enter.
X
Have the headlamps checked at a qualified specialist workshop. 294
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Page 298 of 373

Windscreen wipers
Problem
Possible causes/consequences and
X
X Solutions The windscreen wipers
are jammed. Leaves or snow, for example, may be obstructing the windscreen
wiper movement. The wiper motor has been deactivated.
X
For safety reasons, you should remove the key from the ignition
lock.
X Remove the cause of the obstruction.
X Switch the windscreen wipers back on. The windscreen wipers
fail completely.
G
Risk of accident
The windscreen wiper drive is malfunctioning.
X Select another wiper speed on the combination switch.
X Have the windscreen wipers checked at a qualified specialist
workshop. The windscreen washer
fluid from the spray
nozzles no longer hits
the centre of the wind-
screen. The spray nozzles are misaligned.
X
Have the spray nozzles adjusted at a qualified specialist work-
shop. Side windows
Problem
Possible causes/consequences and
X
X Solutions A side window will not
close. Objects are trapped between the window and the door frame.
X
Remove the objects.
X Close the side window. There are objects in the window guide rail which are preventing
the side window from closing.
X
Remove the objects.
X Close the side window. You cannot see the cause.
X
Close the side window with increased force or without the anti-
entrapment feature (Y page 101). Troubleshooting
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Page 299 of 373

Exterior mirrors
Problem
Possible causes/consequences and
X
X Solutions An exterior mirror has
been pushed out of
position.
Vehicles with exterior mirrors that cannot be folded in/out elec-
trically:
X
Move the exterior mirror into the correct position manually.
Vehicles with electrically folding exterior mirrors*:
X Press the mirror-folding button* (Y page 86) repeatedly until
you hear a distinct click.
The mirror housing is engaged again and you can adjust the
mirror as usual ( Ypage 86). Key
Problem
Possible causes/consequences and
X
X Solutions You cannot lock or
unlock the vehicle
using the key. The key batteries are discharged or nearly discharged.
X
Point the tip of the key at the driver's door handle from close
range and try to unlock or lock the vehicle again.
If this does not work:
X Lock or unlock the vehicle using the emergency key element
(Y page 299). The key is faulty.
X
Lock/unlock the vehicle as described in the "Opening and clos-
ing in an emergency" section (Y page 299).
X Have the key checked at a qualified specialist workshop. You can no longer lock
or unlock the vehicle
using KEYLESS GO*.
KEYLESS GO* is in standby mode because the vehicle has not
been unlocked for an extended period.
X
Pull the door handle and then turn the key to position 2in the
ignition lock. KEYLESS-GO* is malfunctioning.
X
Lock/unlock the vehicle using the remote control function of
the key. Point the tip of the key at the driver's door handle from
close range and press the %/&button.
X Have the key checked at a qualified specialist workshop. There is interference from a powerful source of radio waves.
X
Lock/unlock the vehicle as described in the "Opening and clos-
ing in an emergency" section (Y page 299).296
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Page 300 of 373

Problem
Possible causes/consequences and
X
X Solutions You have lost a key.
X
Have the key cancelled at a Mercedes-Benz Service Centre.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. You have lost the emer-
gency key element.
X
Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. The engine cannot be
started using the key. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating* or inte-
rior lighting, and try to start the engine again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 319).
or
X Jump-start the vehicle (Y page 323).
or
X Consult a qualified specialist workshop. The engine cannot be
started using the key.
The steering lock is mechanically blocked.
44
X Remove the key and reinsert it into the ignition lock. While doing
this, turn the steering wheel in both directions. The engine cannot be
started using KEYLESS
GO*. The key is in the
vehicle. A door is open. Therefore, the key cannot be detected as easily.
X
Close the door and try to start the vehicle again. There is interference from a powerful source of radio waves.
X
Start your vehicle using the key in the ignition lock. 44
Not vehicles with DIRECT SELECT selector lever. Troubleshooting
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Page 301 of 373

Auxiliary heating*
Display messages
Possible causes/consequences and
X
X Solutions FAIL The starter battery is not charged sufficiently or the system
is faulty.
X
Charge the starter battery.
X Make another attempt to switch on the auxiliary heating
using the remote control.
X Have the auxiliary heating checked at a qualified specialist
workshop. $ FAIL The signal transmission between the transmitter and the vehi-
cle is faulty.
X
Change your position in relation to the vehicle, moving
closer if necessary.
X Make another attempt to switch the auxiliary heating on or
off using the remote control. © FAIL There is not enough fuel in the fuel tank, or the auxiliary heat-
ing is faulty.
X
Refuel at the nearest filling station.
X Make another attempt to switch on the auxiliary heating
using the remote control.
X Have the auxiliary heating checked at a qualified specialist
workshop. Parking up the vehicle
Problem
Possible causes/consequences and
X XSolutions The vehicle is to be left
parked up for longer
than four weeks. The battery can be damaged through exhaustive discharge.
X
Disconnect the battery (Y page 321) or connect to a trickle
charger.
i Have the battery checked at a qualified specialist workshop,
e.g. a Mercedes-Benz Service Centre. The vehicle is to be left
parked up for longer
than six weeks. Damage resulting from non-use may occur if the vehicle is parked
up for long periods.
X
Visit a qualified specialist workshop and seek advice. 298
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Page 302 of 373

Locking/unlocking in an emergency
Emergency key element
If the vehicle can no longer be locked or
unlocked with the key, use the emergency
key element.
If you use the emergency key element to
unlock and open the driver's door or the boot
lid, the anti-theft alarm system* will be trig-
gered (Y page 65).
There are several ways to turn off the alarm:
X Press the %or& button on the key.
or
X Insert the key into the ignition lock.
or
X Press the start/stop button *in the ignition
lock. The key must be in the vehicle.
or
X Lock or unlock the vehicle using KEYLESS
GO*. The key must be outside the vehicle.
If you unlock the vehicle using the emergency
key element, the fuel filler flap will not be
unlocked automatically.
X To unlock the fuel filler flap: insert the
key in the ignition lock.
Removing the emergency key element X
Push release catch :in the direction of
the arrow and at the same time remove
emergency key element ;from the key. Unlocking the vehicle
If the vehicle can no longer be unlocked cen-
trally with the key or KEYLESS GO*:
X Remove the emergency key element from
the key (Y page 299). X
Insert the emergency key element into the
lock of the driver's door as far as it will go.
X Turn the emergency key element anti-
clockwise to position 1.
The door is unlocked.
i On right-hand-drive vehicles, turn the
emergency key element clockwise.
X Turn the emergency key element back and
remove it. Locking the vehicle
If the vehicle can no longer be unlocked cen-
trally with the key or KEYLESS GO*:
X Open the driver's door.
X Close the front-passenger door and the
boot lid.
Close the front-passenger door and the
boot lid/tailgate.
X Press the locking button (Y page 71).
X Check whether the locking knobs on the
doors are still visible. Press the locking
knobs down manually, if necessary.
X Close the driver's door.
X Remove the emergency key element from
the key (Y page 299). Locking/unlocking in an emergency
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X
Insert the emergency key element into the
lock of the driver's door as far as it will go.
X Turn the emergency key element clockwise
as far as it will go to position 1.
i On right-hand-drive vehicles, turn the
emergency key element anti-clockwise.
X Turn the emergency key element back and
remove it.
X Check whether the doors and the boot lid/
tailgate are locked. Opening the boot (Saloon)
! The boot lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the boot lid.
If the boot can no longer be unlocked with the
key or KEYLESS GO*:
X Remove the emergency key element from
the key (Y page 299). X
Insert the emergency key element fully into
the tailgate lock.
X Turn the emergency key element anti-
clockwise as far as it will go to position
1.
The boot is unlocked.
X Turn the emergency key element back and
remove it. Opening the tailgate (Estate)
If the tailgate can no longer be opened from
the outside, use the emergency release on
the inside of the tailgate.
On vehicles with a folding bench seat*, you
can use the handle to open the tailgate from
the inside (Y page 73).
X Remove the emergency key element from
the key (Y page 299). !
When opening, the tailgate swings up and
out. Therefore, make sure that there is suf-
ficient clearance above and behind the tail-
gate.
X Insert emergency key element ;into
opening in trim :.
X Turn emergency key element ;90° clock-
wise.
X Push emergency key element ;in the
direction of the arrow and open the tail-
gate. 300
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Page 304 of 373

Emergency fuel filler flap release
G
Risk of injury
The edges on the inside of the vehicle body
can be sharp. You could injure yourself when
using the fuel filler flap emergency release.
Avoid contact with the edges on the inside of
the vehicle body.
The emergency release is located in the
boot/luggage compartment behind the side
trim on the right-hand side, when viewed in
the direction of travel.
Saloon X
Slide down the luggage net.
X Open the side trim. X
Detach the emergency release from
retainer :.
X Pull the emergency release in the direction
of arrow ;.
The fuel filler flap is unlocked.
X Open the fuel filler flap.
Estate X
Open the side trim.
X Fold down the trim. X
Pull the emergency release in the direction
of arrow :.
The fuel filler flap is unlocked.
X Open the fuel filler flap. Releasing the parking lock manually
i The following description does not apply
to vehicles with DIRECT SELECT levers and
AMG vehicles.
In the event of an electrical fault, it is possible
to release the selector lever lock manually to
move it out of position P, e.g. if you wish to
tow the vehicle away. X
Depress the parking brake firmly.
X Prise out selector lever gaiter :with a flat,
blunt object, (e. g. a screwdriver wrapped Locking/unlocking in an emergency
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