Display messages
Possible causes/consequences and
X
X Solutions b Malfunc‐
tion See
Owner's
Manual The exterior lighting is faulty.
X
Visit a qualified specialist workshop. Vehicles with trailer coupling*: a fuse may have blown.
X
Check the fuses (Y page 328).
X If necessary, replace the blown fuse. Observe the warning
notes.
If the display message continues to be shown:
X Visit a qualified specialist workshop. ¸ Replace
air
cleaner
The engine air filter is dirty and must be replaced
42
.
X Visit a qualified specialist workshop. 4 Check
eng. oil
lev. when
next refu‐
elling The engine oil level has dropped to a critical level. A warning
tone also sounds.
X
Check the engine oil level ( Ypage 220).
X If necessary, top up the engine oil.
X Have the engine checked for leaks if the engine oil needs
topping up more often than usual. + Change
key bat‐
teries The key batteries are discharged.
X
Change the batteries ( Ypage 304). + Key not
detected
(red display
message)
The KEYLESS GO key* is not in the vehicle. A warning tone
also sounds.
If you switch off the engine, you can no longer centrally lock
the vehicle and no longer start the engine.
X
Pull over and stop the vehicle safely as soon as possible,
paying attention to road and traffic conditions.
X Locate the KEYLESS GO key*. The KEYLESS GO key* is not detected while driving because
a powerful radio transmitter is causing interference. A warn-
ing tone also sounds.
X
Pull over and stop the vehicle safely as soon as possible,
paying attention to road and traffic conditions.
X Remove the Start/Stop button* from the ignition
lock (Y page 75).
X Insert the key into the ignition lock and turn it to the desired
position. 42
Only for certain vehicles. 274
Display
messagesPractical advice
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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
TroubleshootingPractical advice
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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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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
297Practical advice
* optional
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X
Firmly depress the parking brake and on
vehicles with automatic transmission*,
shift the transmission to position P.
X Switch off all electrical consumers (e.g.
radio, blower, etc.).
X Turn the key to 0(Y page 75) in the ignition
lock and remove it or make sure that no
ignition position has been selected with
KEYLESS GO*. In the instrument cluster, all
of the indicator lamps must be out.
X Vehicles with the battery in the engine
compartment: open the bonnet.
X Vehicles with the battery in the boot:
open the boot. X
Vehicles with a battery in the engine
compartment: release and remove
clamps ;on filter box :.
X Remove the negative terminal clamp from
the battery.
X Remove the cover from the positive termi-
nal clamp.
X Remove the positive terminal clamp from
the battery.
X Disconnect the breather hose. Removing the battery
X Disconnect the battery ( Ypage 321).
X Loosen the bolt which holds the battery in
place.
X Remove the battery. Charging and fitting the battery
G
Risk of injury
Battery acid is caustic. Avoid contact with the
skin, eyes or clothing.
Charging the battery G
Risk of injury
Only charge the battery in a well-ventilated
area. As the battery is being charged, gases
can escape and generate minor explosions.
This could injure you and other persons or
cause damage to the paintwork or acid cor-
rosion on the vehicle.
You can obtain information about battery
chargers which allow the battery to be
charged while still installed from a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre. G
Risk of injury
There is a risk of acid burns during the charg-
ing process due to the gases which escape
from the battery. Do not lean over the battery
during the charging process.
! Only charge the installed battery with a
battery charger which has been tested and
approved by Mercedes-Benz. These battery
chargers allow the battery to be charged
while still installed.
! Only use battery chargers with a maxi-
mum charging voltage of 14.8 V.
! Only charge the battery using the jump-
start connection point.
X Vehicles with the battery in the engine
compartment: open the bonnet.
X Vehicles with the battery in the boot:
open the boot.
X Connect the battery charger by its positive
terminal and earth point in the same order
as when connecting the donor battery in 322
BatteryPractical advice
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the jump-starting procedure
(Y
page 323).
Fitting the battery X
Install the battery. To do this, follow the
steps described in "Removing the battery"
(Y page 322) in reverse order.
X Reconnect the battery (Y page 323).Reconnecting the battery
! Always connect the battery in the order
described below. Never swap the terminal
clamps. Otherwise, you may damage the
vehicle electronics.
X Switch off all electrical consumers (e.g.
radio, blower, etc.).
X Connect the positive terminal clamp and
secure the cover.
X Connect the negative terminal clamp.
X Connect the breather hose.
X On vehicles with the battery in the
engine compartment: put the filter box
back in place, then clip in and close the
retaining clamps.
Close the bonnet.
X Vehicles with the battery in the boot:
close the boot.
i If the battery power supply has been inter-
rupted (e.g. if it has been reconnected), you
must carry out the following tasks:
R set the time ( Ypage 132)
R reset the function for folding the exterior
mirrors in/out automatically* by folding
the mirrors out once ( Ypage 87) Jump-starting
If your vehicle's battery is discharged, the
engine can be jump-started from another
vehicle or from an external battery using jump
leads. Observe the following points:
R
you may only jump-start when the engine
and catalytic converter are cold.
R do not start the engine if the battery is fro-
zen. Let the battery thaw first.
R jump-starting may only be performed from
batteries with a nominal voltage of 12 V.
R only use jump leads which have a sufficient
cross-section and insulated terminal
clamps.
i Jump leads and further information about
jump-starting can be obtained from any
Mercedes-Benz Service Centre.
! Avoid repeated and lengthy starting
attempts.
Do not use a rapid-charging device to start
the engine. G
Risk of injury
There is a risk of acid burns when jump-start-
ing a vehicle due to the gases which escape
from the battery. Do not lean over the battery
while the engine is being jump-started. G
Risk of explosion
Gases escaping from the battery during jump-
starting may cause minor explosions. Avoid
creating sparks. Keep naked flames away
from the battery, and do not smoke.
Comply with safety precautions and take pro-
tective measures when handling batteries.
You will find these under "Battery" in the
index.
X Make sure that the two vehicles do not
touch.
X Depress the parking brake firmly.
X Manual transmission: engage neutral.
X Automatic transmission*: shift the trans-
mission to position P.
X Switch off all electrical consumers (e.g.
radio, blower, etc.).
X Open the bonnet (Y page 219). Jump-starting
323Practical advice
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Aerial positions, Estate
:
Front roof area (vehicles with sliding/tilt-
ing sunroof*: observe the roof's sweep)
(vehicles with panorama sliding roof*: this
area is not authorised for use)
; Rear roof area
= Rear mudguard (recommended installa-
tion position: on the side which faces the
centre of the road) G
Risk of accident
Incorrect retrofitting of RF transmitters can
cause the vehicle electronics to malfunction,
impair the vehicle's operating safety and,
thus, also impair your own safety.
To ensure correct installation, Mercedes-
Benz recommends having this work done at a
Mercedes-Benz Service Centre or at a quali-
fied specialist workshop. G
Risk of injury
Improper installation of RF transmitters can
lead to increased electromagnetic radiation in
the vehicle interior. Using an exterior aerial
takes into account current scientific discus-
sions relating to the possible health hazards
that may result from electromagnetic fields.
To ensure correct installation, Mercedes-
Benz recommends having this work done at a
Mercedes-Benz Service Centre or at a quali-
fied specialist workshop.
Deviations with respect to aerial locations,
output and frequencies must be approved by
Mercedes-Benz. Other aerial positions
There is no restriction for aerial positions in
the outer area of the vehicle for these wave-
bands: trunked radio/Tetra, 70 cm wave-
band, GSM 900/AMPS, GSM 1800 and
UMTS.
Legal provisions for fittings must be
observed.
RF transmitters with a maximum transmis-
sion output of 100 mW (PEAK) may be used
in the vehicle without restrictions.
!
The operating permit may be invalidated
if the instructions for installation and use of
RF transmitters are not observed, e.g.
approved wavebands, maximum output
and aerial positions on the vehicle. Vehicle identification plates
Vehicle identification plate with vehi-
cle identification number (VIN) and
paint code number
The vehicle identification plate is located on
the side of the door frame on the right-hand
side. X
Open the front right-hand door.
You will see vehicle identification plate :.332
Vehicle identification platesTechnical data
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Country Radio type approval number MHz frequency
range
Slovenia Article 6 of Directive 1999/5/EC R&TTE
500-1/2005-437 9 May 05 27, 40, 433, 868
Spain 000438/2005, 000439/2005, 000440/2005
000441/2005, 000445/2005, 000446/2005
000447/2005 27, 40, 433, 868
South Africa 11 October 2005 27, 40, 433
Syria 279/4/14 / 05 March 06
Czech Republic General Licence GL-30/R/2000 Reg. No. 844 13
May 05 27, 40, 433
Turkey National Certification 23 July 07 433
Hungary Article 6 of Directive 1999/5/EC R&TTE18 May
05 27, 40, 433, 868
United Arab
Emirates 1623/5/10-2/26/76 433
Cyprus Article 6 of Directive 1999/5/EC R&TTE5 May 05 27, 40, 433, 868
24-GHz radar sensor system (country
overview)*
The 24 GHz radar sensor system requires
separate approval for each country. When
you are driving in a country in which the radar
sensor system is not approved, you must
deactivate the system using the on-board
computer (Y page 134). The current country
overview can be obtained from a Mercedes-
Benz Service Centre. The radar sensor system is automatically
deactivated near radio telescope facilities. If
Distronic Plus*, Blind Spot Assist* or PRE-
SAFE
®
Brake* are activated at this point, a
corresponding warning will appear in the
multi-function display to tell you that the
radar sensor system is being switched off.
BAS PLUS* is also no longer available. If the
deactivation does not occur automatically,
you must deactivate the radar sensor system
using the on-board computer (Y page 134).Country Radio telescope
facilities Geographic coordinates
(latitude/longitude) Distance to be
maintained from the facility Egypt – – –
Andorra – – –
Australia Parkes 32°59'59"S, 148°15'44" E 10 km
Narrabri 30°18'52"S, 149°32'56" E 10 km362
24-GHz radar sensor system (country overview)*Technical data
* optional
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