Page 249 of 401

Care
246R
battery
R connectors
R lights
R seals
Damaged seals or electrical components
can lead to failures or leaks.
Cleaning the wiper blades and the out-
side of the windscreen G
Risk of injury
Turn the key to position 0in the ignition
lock before cleaning the windscreen or the
wiper blades. There is otherwise a risk of
the windscreen wipers being set in motion
and causing injury.
X Turn the key to position 1in the ignition
lock (Y page 76).
X Set the windscreen wipers to position
u on the combination switch
(Y page 105).
X Turn the key to position 0or remove it when
the wiper arms are vertical (Y page 76).!
Only fold the wiper arms away from the
windscreen when they are in a vertical posi-
tion, otherwise you will damage the bonnet.
X Fold the wiper arms away from the wind-
screen until you feel them engage.
X Clean the windscreen and the wiper blades.
X Fold the windscreen wipers back again
before the ignition is switched on.
! Do not clean the wiper blades too often,
otherwise the rubber may become porous,
resulting in wiper noise.
Cleaning the windows !
Do not use dry cloths, abrasive products,
solvents or cleaning agents containing sol-
vents to clean the inside of the windows.
Clean the insides of the windows with a
damp cloth or commercially-available glass
cleaner. Avoid touching the inside of the
rear windscreen and the side windows with
hard objects, e.g. ice scrapers or rings. You
could otherwise cause damage to the win-
dows, rear window heating or aerial on the
rear window. i
Anti-glare film retrofitted to the insides of
the windows could interfere with radio or
mobile phone reception, especially if it is
conductive or metal-coated film. Informa-
tion about anti-glare film can be obtained
from any Mercedes-Benz Service Centre.
Cleaning the headlamps X
Clean the headlamp lenses with a wet
sponge.
! Only use washer fluid which is suitable
for plastic lenses. Unsuitable washer fluid
could damage the plastic lenses of the
headlamps.
Do not use the following:
R dry cloths
R abrasive cleaning agents
R solvents
R cleaning agents containing solvent
You could otherwise scratch or damage the
surface of the lenses. Operation
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Care
248Use the chrome cleaning agent recommen-
ded by Mercedes-Benz for cleaning. Infor-
mation about chrome cleaning agents can
be obtained from any Mercedes-Benz
Service Centre.
Cleaning Distronic* 1
Distronic* cover
X Turn the key to position 0in the ignition
lock.
X Clean cover 1in the radiator grille with
water, car shampoo and a soft cloth.
! Do not use dry, coarse or hard cloths and
do not scrub. Doing so will scratch or dam-
age the surfaces. Cleaning Parktronic* The sensors are located in the front and rear
bumpers.
1
Parktronic* sensors in the front bumper
(left-hand side)
X Clean sensors 1in the bumper with water,
car shampoo and a soft cloth.
! Do not use dry, coarse or hard cloths and
do not scrub. You will otherwise scratch or
damage the sensors. If you intend to use a
high-pressure cleaner or a steam cleaner to
clean the sensors, observe the instructions
issued by the equipment manufacturer
concerning the distance to be maintained
between the nozzle of the high-pressure
cleaner and the vehicle. Trailer coupling*
The ball coupling must be cleaned if it
becomes dirty or corroded.
X Remove any rust using a wire brush.
X Remove dirt with a clean, lint-free cloth or
a brush.
! Do not clean the ball coupling with a high-
pressure cleaner. Do not use solvents. 1
Ball neck head
X After cleaning, lightly oil or grease ball cou-
pling 1.
X Check that the vehicle's trailer coupling is
working properly. Operation
* optional
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        Page 264 of 401

Display
messages 261Display messages Possible cause/consequence Possible solution
P Selector lever in
park position You have switched off the engine with the
KEYLESS GO button* and opened the driv-
er's door.
or
With HOLD activated, you have either:
R
opened the driver’s door and released
the seat belt or
R switched off the engine or
R opened the bonnet
The horn may also sound at regular inter-
vals. The horn becomes louder if you
attempt to lock the vehicle.
The engine cannot be started. X
Move the selector lever to P.
The engine can be started again. P Selector lever in
park position You have tried to switch off the engine
with the KEYLESS GO button* while the
selector lever is in position
Ror D. X
Move the selector lever to P.Please shift to P or N You have attempted to start the engine
while the selector lever is not in position
P
or N. X
Move the selector lever to Por N. Practical advi
ce
* optional
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        Page 282 of 401

Display
messages 279Display messages Possible cause/consequence Possible solution
H Tyre pressure
Check tyres The pressure in one or more tyres has
dropped significantly. The affected wheel
is highlighted in the tyre pressure display
of the tyre pressure monitor*. X
Stop the vehicle without making any sudden
steering or braking manoeuvres. Pay attention
to the traffic conditions as you do so.
X Check the tyres.
X Repair or change the faulty tyre if necessary
(Y page 317).
X Check the tyre pressure and correct it if nec-
essary (Y page 229).
The warning will disappear automatically after
you have been driving for a few minutes with
the corrected tyre pressure. I Change key batter-
ies The batteries of the KEYLESS GO key* are
discharged. X
Change the batteries (Y page 310).I Key not detected
The KEYLESS GO key* is not in the vehicle.
It will no longer be possible to centrally
lock the vehicle and start the engine if the
engine is switched off. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Look for the KEYLESS GO key *.I Key not detected
The
KEYLESS GO* key is not detected
while the engine is running, because there
is interference from a strong source of
radio waves. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Operate the vehicle using the key in the ignition
lock if necessary. Practical advice
* optional
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Display
messages 280 Display messages Possible cause/consequence Possible solution
I Key not detected
The KEYLESS GO key* cannot be detected
at present. X
Change the location of the KEYLESS GO key*
within the vehicle.
X Operate the vehicle using the key in the ignition
lock if necessary. I Key still in vehi-
cle
The KEYLESS GO key* was detected
inside the vehicle during locking. X
Remove the KEYLESS GO key* from the vehi-
cle. I Please replace key The key no longer functions. X
Visit a qualified specialist workshop. X inoperative Bat-
tery weak The battery voltage is insufficient. The
auxiliary heating/ventilation* has
switched off or cannot be switched on. X
Drive for a longer distance.
The battery is being charged. The auxiliary
heating/ventilation* is reactivated as soon as
there is sufficient battery voltage. X inoperative Refuel There is insufficient fuel in the fuel tank.
The auxiliary heating* cannot be switched
on. X
Refuel at the nearest filling station. X inoperative See
Owner's Manual
The auxiliary heating* has a temporary
malfunction or is faulty. X
When the vehicle is on a level surface and the
engine has cooled down: try to switch on the
auxiliary heating* four times, waiting for sev-
eral minutes between each attempt.
X If the auxiliary heating* does not switch on:
visit a qualified specialist workshop. Practical advi
ce
* optional
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        Page 295 of 401

Troubleshooting
292 Warning tones
Problem Possible cause/consequence Suggested solutions
The anti-theft warning alarm* is
triggered. You have opened the vehicle
using the emergency key element
without deactivating the anti-
theft alarm system* first. X
Switch off the alarm (Y page 62).You hear a warning tone. A message appears in the multi-
function display. X
See the explanations for the display message (Y page 257).You hear a warning tone. You are driving with the parking
brake applied. X
Release the parking brake. You hear a warning tone. You did not switch off the lights
when leaving the vehicle. X
Turn the light switch to MorU.
or
X If the rear foglamp is switched on: press the light switch in to the
stop. You hear a warning tone.
G
Risk of injury
The driver or front passenger has
not fastened their seat belt. X
Fasten your seat belt (Y page 95).You hear a continuous tone. You have switched off the engine
and opened the bonnet or the
driver's door with HOLD activa-
ted. X
Deactivate HOLD (Y page 155). Practical advice
* optional
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        Page 296 of 401
Troubleshooting
293Accident
Problem Possible cause/consequence Suggested solutions
Fuel is leaking from the vehicle.
G
Risk of fire
The fuel line or the fuel tank has
been damaged. The leaking fuel
creates a risk of fire or explosion. X
Switch off the ignition immediately.
X Remove the ignition key.
Do not restart the engine under any circumstances. The leaking fuel
creates a risk of fire or explosion.
X Consult a qualified specialist workshop. You are unable to determine the
extent of the damage. X
Consult a qualified specialist workshop. You cannot detect any damage. X
Start the engine as normal. The NECK-PRO head restraints
on the driver's and front-
passenger seats have been trig-
gered. Your vehicle has been involved in
a rear-end collision. X
Reset the NECK-PRO head restraints (Y page 309). Practical advice
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Troubleshooting
294 Fuel and fuel tank
Problem Possible cause/consequence Suggested solutions
Fuel is leaking from the vehicle.
G
Risk of explosion or fire
The fuel line or the fuel tank is
defective. X
Turn the key to position 0in the ignition lock immediately and
remove it.
X Do not restart the engine under any circumstances.
X Consult a qualified specialist workshop. The fuel filler flap cannot be
opened. The fuel filler flap is not released. X
Unlock the vehicle ( Ypage 306). The opening mechanism is jam-
med. X
Consult a qualified specialist workshop. The fuel tank of a vehicle with a
diesel engine has been run com-
pletely dry. There is air in the fuel system. X
Refuel the vehicle.
X Switch on the ignition for approximately 10 seconds (key in posi-
tion 2in the ignition lock).
X Start the engine continuously for up to 40 seconds until it runs
smoothly.
The fuel system is now free of air.
If the engine does not start:
X Wait two minutes.
X Repeat the starting procedure for up to 40 seconds.
If the engine still does not start:
X Consult a qualified specialist workshop. Practical advice
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