Troubleshooting
28
6 Warning tone
s Problem Possible cause/consequence Suggested solutions
The anti-theft alarm system* is
suddenly triggered. You have opened the vehicle
using the emergency key element
without deactivating the anti-
theft alarm system* first. Key:
X
Press the Œor the ‹button.
or
X Insert the key into the ignition lock.
The alarm is deactivated.
KEYLESS GO* :
X Grasp the exterior door handle. The KEYLESS GO key* must be
outside the vehicle .
The alarm is deactivated.
or
X Press the KEYLESS GO button* on the dashboard. The KEYLESS
GO key* must be inside the vehicle.
The alarm is deactivated. You hear a warning tone. A message appears in the multi-
function display. X
See the explanations for the display message (Y page 236). You hear a warning tone. You are driving with the parkin
g
brake on. X
Release the parking brake. Practical advice
* optional
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6
Troubleshooting
29
6 Key
Problem Possible cause/consequence Suggested solutions
You cannot lock or unlock th
e
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 open the vehicle again.
If this does not work:
X Lock or unlock the vehicle using the emergency key element
(Y page 300).
X Check the key batteries (Y page 304) and replace them if neces-
sary (Y page 304). The key is faulty. X
Lock or unlock the vehicle using the emergency key element
(Y page 300).
X Have the key checked at a qualified specialist workshop .The battery charge indicator lamp
of the key does not go on during
the test. The key batteries are discharged. X
Change the batteries (Y page 304). 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 emergency key
element. X
Report the loss immediately to the vehicle insurers .
X If necessary, have the manual locks changed too. Practical advice
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Troubleshooting
29
8 KEYLESS GO*
Problem Possible cause/consequence Suggested solutions
You cannot lock or unlock th
e
vehicle using the KEYLESS GO
key. The KEYLESS GO key batterie
s
are discharged or nearly dis-
charged. X
Lock or 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 try to open the vehicle again.
If this does not work:
X Lock or unlock the vehicle using the emergency key element
(Y page 300).
X Check the KEYLESS GO key batteries (Y page 304) and replace
them if necessary (Y page 304). There is a fault with KEYLESS GO. X
Lock or unlock the vehicle using the remote control function of the
key. To do this, point the tip of the key at the driver's door handle
from close range and try to open the vehicle again.
X Have the KEYLESS GO key checked at a qualified specialist work-
shop . There is interference from a pow-
erful source of radio waves. X
Lock or unlock the vehicle using the emergency key element
(Y page 300). The battery check lamp in the
KEYLESS GO key does not light
up when tested. The KEYLESS GO key batteries
are discharged. X
Change the batteries (Y page 304). Practical advice
* optional
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Troubleshooting
29
9 Problem Possible cause/consequence Suggested solutions
The vehicle cannot be started
using the KEYLESS GO key and
the KEYLESS GO button. The KEY-
LESS GO key is in the vehicle. A door is open. The key therefore
cannot be detected so easily. X
Close the door and try to start the vehicle again . You did not depress the brak
e
when starting the engine. X
Depress the brake pedal and press the KEYLESS GO button. There is interference from a pow-
erful source of radio waves
. X
Start your vehicle using the KEYLESS GO key in the ignition lock. You have lost the KEYLESS GO
key
. X
Have the KEYLESS GO 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. Parking up the vehicle
Proble
m Possible cause/consequence Suggested solutions
The vehicle is to be left parked up
for longer than six weeks. X
Visit a qualified specialist workshop and seek advice.
X Disconnect the battery (Y page 326). Practical advice
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Locking/unlocking in an emergency
300 Locking/unlocking in an emergency
Emergency key
If the vehicle can no longer be unlocked or
locked with the key or the KEYLESS GO
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 71).
There are several ways to turn off the alarm:
X Press the korj button on the key.
or
X Insert the key into the ignition lock.
or
X Press the KEYLESS GO but-
ton* (Y page 85).
or
X Lock or unlock the vehicle using KEYLESS
GO*.
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. Releasing and removing the emergenc
y
key element 1
Release catch
2 Emergency key element
X Push release catch 1in the direction of
the arrow and at the same time remove
emergency key element 2from the key. Unlocking the vehicle
If the vehicle can no longer be unlocked cen-
trally with the key or the KEYLESS GO key*:
X Remove the emergency key element from
the key (Y page 300). $
To unlock
X Insert the emergency key element fully into
the lock of the driver's door.
X Turn the emergency key element anti-
clockwise to position $.
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. Practical advice
* optional
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Locking/unlocking in an emergency
301Locking the vehicle
If the vehicle can no longer be locked cen -
trally with the key or the KEYLESS GO key*:
X Open the driver's door.
X Close the front-passenger door, the rear
doors and the boot lid/tailgate.
X Press the central locking button
(Y page 80).
X Check whether the locking knobs on th e
doors are still visible. Press the locking
knobs down by hand if necessary.
X Remove the emergency key element from
the key (Y page 300). $
To lock X
Insert the emergency key element fully into
the lock of the driver's door.
X Turn the emergency key element clockwise
as far as it will go to position $.
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
! The boot lid swings upwards when
opened. Therefore, make sure that there is
enough space above the boot lid.
If the boot can no longer be unlocked with th e
key or the KEYLESS GO key *:
X Remove the emergency key element from
the key (Y page 300). Boot lock
$ Basic position
% Unlocking the boot
X Insert the emergency key element fully into
the boot lock.
X Turn the emergency key element anti-
clockwise as far as it will go to position
% .
The boot is unlocked.
X Turn the emergency key element back to
basic position $and remove it. Practical advice
* optional
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Flat tyre
314
Vehicles with automatic transmission
*X
Move the selector lever to P.
For all vehicles X
Place the warning triangle (Y page 232) or
warning lamps at a suitable distance.
Observe legal requirements. G
Risk of injury
The jack is designed only to raise and hol d
the vehicle for a short time while a whee l
is being changed.
If you are carrying out work on the vehicle,
you must use stands.
Make sure that the jack is placed on a firm ,
non-slip and level surface. Do not us e
wooden blocks or similar objects as a jac k
underlay. Otherwise the jack will not be
able to achieve its load-bearing capacit y
due to the restricted height.
Do not start the engine at any time while a
wheel is being changed.
Do not lie under the vehicle when it is bein g
supported by the jack. If you do not raise
the vehicle as described, it could slip off the
jack (e.g. if the engine is started or a door or the boot lid/tailgate is opened or closed)
and you could be seriously injured. Using the TIREFIT kit
You can use the TIREFIT kit to seal small
punctures, particularly those in the tyre tread.
You can use TIREFIT in outdoor temperatures
down to -20 °C. G
Risk of accident
In the following situations, your safety is at
particular risk and TIREFIT is unable to pro -
vide breakdown assistance:
R if there are cuts or punctures in the tyre
greater than 4 mm
R if the wheel rim is damaged
R if you have driven at very low tyre pres-
sures or on a flat tyre
Do not drive any further. Consult a qualified
specialist workshop which has the neces-
sary specialist knowledge and tools to carr y
out the work required.
Mercedes-Benz recommends that you use
a Mercedes-Benz Service Centre for this
purpose. In particular, work relevant to
safety or on safety-related systems must be carried out at a qualified specialist work-
shop.
X Do not remove any foreign objects which
have penetrated the tyre, e.g. screws or
nails .
X Remove TIREFIT, the accompanying "max .
80 km/h“ and the electric air pump from
the stowage compartment in the boot floo r
(Saloon) or the luggage compartment floor
(Estate) (Y page 232). 1
Driver's field of vision sticker
2 Wheel sticker
X Affix part 1of the sticker within the driv-
er's field of vision.
X Affix part 2of the sticker near the valve
on the wheel with the defective tyre. Practical advice
* optional
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Fuse
s 333
!
Only use fuses that have been approved
for Mercedes-Benz vehicles and which
have the correct amperage for the system
concerned. Otherwise, components or sys-
tems could be damaged.
The fuses are located in various fuse boxes :
R Dashboard fuse box* on driver's side
R Fuse box in the engine compartment on the
driver's sid e
R Fuse box in the boot/luggage compart-
ment on the right-hand side of the vehicle
Fuse allocation chart The fuse allocation chart is located with the
vehicle tool kit (Y page 234) in the stowage
compartment under the boot/luggage com-
partment floor. The fuse amperage is also
indicated there. Before changing a fuse
X Park the vehicle.
X Switch off all electrical consumers .
X Remove the key from the ignition lock. Fuse box in the dashboard*
1
Cove r
2 To remove the cover
3 To release the cover
X To open: open the driver’s door.
X Pull out cover 1slightly at the bottom
3 .
X Pull cover 1outwards and remove it 2.
X To close: clip in cover 1at the front. X
Fold cover 1inwards until it engages.
X Close the driver's door . Fuse box in the engine compartment
X Make sure that the windscreen wipers are
turned off. G
Risk of injury
Make sure that the windscreen wipers are
turned off and the key is pulled out of the
ignition lock before you open the cover of
the fuse box. Otherwise, the windscreen
wipers and their wiper rods above the cove r
could be set in motion. This could lead to
parts of the body being trapped by the
wiper rods.
X To open: open the bonnet (Y page 206). Practical advice
* optional
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