Page 171 of 273

Car
e 168
X
Turn the key to position 1in the ignition
lock (Y page 59).
X Set the windscreen wipers to position Ion
the combination switch (Y page 78).
X Turn the key to position 0or remove it when
the wiper arms are vertical (Y page 59).
! Only fold the windscreen wipers away
from the windscreen when vertical, other -
wise 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 agai n
before the ignition is switched on.
! Do not clean the wiper blades too often,
as otherwise the coating may come off.
This could cause 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 th e
headlamps.
Therefore, 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
.
Plastic trim !
Do not use dry, coarse or hard cloths and
do not scrub. Doing so will scratch or dam-
age the surfaces.
X Wipe plastic parts with a damp, lint-free
cloth (e.g. a microfibre cloth).
X Light soiling: use a low-foaming soap (e.g .
a light liquid hand soap) diluted in water.
X Heavy soiling: use a cleaning agent that is
solvent-free and non-corrosive. Mercedes-
Benz recommends that you use a
Mercedes-Benz cleaning product for this
purpose.
Cleaning the steering wheel boss and
dashboard X
Moisten a clean lint-free cloth with water.
X Clean the plastic parts and the dashboard.
X If particularly dirty, use a mild detergent. Operation
171_AKB; 3; 4, en-GB
vpfaff7,
2007-11-13T10:50:25+01:00 - Seite 168
Page 186 of 273

Display
messages 18
3 Display messages Possible cause/consequence Possible solution
. AUTO lights inop-
erative The light sensor is faulty. Constant head-
lamp mode is switched on. X
Switch the lights to manual control in the on-
board computer (Y page 104).
X Switch the lights on and off using the light
switch. . Rear left turn sig-
nal Back-up bulb on
or
Rear right turn
signal Back-up
bulb on The rear left-hand or rear right-hand turn
signal is faulty. X
Replace the bulb (Y page 213). . Turn signal in
left-hand mirror
or
Turn signal in
right-hand mirror The turn signal in the left-hand or right-
hand exterior mirror is faulty. This mes-
sage will only appear if all LEDs have
failed. X
Visit a qualified specialist workshop. . Front left turn
signal Back-up
bulb on
or
Front right turn
signal Back-up
bulb on The front left-hand or right-hand turn sig-
nal is faulty. X
Replace the bulb (Y page 213). Practical advice
171_AKB; 3; 4, en-GB
vpfaff7,
2007-11-13T10:50:25+01:00 - Seite 183 Z
Page 187 of 273

Display
messages 18
4 Display messages Possible cause/consequence Possible solution
. Brake/tail lamp
left
or
Brake/tail lamp
right The left-hand or right-hand brake lamp is
faulty. This message will only appear if all
LEDs have failed. X
Visit a qualified specialist workshop. . 3rd brake lamp The third brake lamp is faulty. This mes-
sage will only appear if all LEDs have
failed. X
Visit a qualified specialist workshop. . Main beam left
or
Main beam right The left-hand or right-hand main-beam
headlamp is faulty. X
Replace the bulb (Y page 213). . Licence plate
lamp, left
or
Licence plate
lamp, right The left-hand or right-hand licence plate
lamp is faulty. X
Replace the bulb (Y page 213). . Turn off lights You did not switch off the lights when
leaving the vehicle. X
Turn the light switch to MorU . . Turn off lights or
remove key The light switch is on
Uand you have
forgotten to remove the key. The side
lamps remain switched on . X
Remove the key from the ignition lock.
or
X Turn the light switch to M. Practical advice
171_AKB; 3; 4, en-GB
vpfaff7,
2007-11-13T10:50:25+01:00 - Seite 184
Page 193 of 273

Troubleshooting
19
0 Troubleshooting
Points to remembe
rG
Risk of accident and injury
Always have maintenance work carried out at a qualified specialist workshop which has the necessary specialist knowledge and tools to
carry 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 workshop. If this work is not
carried out correctly, the operating safety of your vehicle could be compromised. There is a risk of accident and injury. Indicator and warning lamps in switches and buttons
Problem Possible cause/consequence Suggested solutions
One or all of the indicator lamps
in the seat heating* button are
flashing. There is insufficient voltage
because too many consumers are
switched on. The seat heating*
has switched itself off automati-
cally. X
Switch off consumers that are not required, e.g. reading lamps ,
interior lighting, etc .
The seat heating* will automatically switch back on as soon as
there is sufficient voltage again. The AIRSCARF neck-level heat-
ing* function has switched itself
off prematurely or cannot be
switched on. There is insufficient voltage
because too many consumers are
switched on. X
Switch off consumers that are not required, e.g. reading lamps ,
interior lighting, etc .
X Switch on the AIRSCARF neck-level heating* function again. Practical advice
* optional
171_AKB; 3; 4, en-GB
vpfaff7,
2007-11-13T10:50:25+01:00 - Seite 190
Page 194 of 273

Troubleshooting
19
1 Problem Possible cause/consequence Suggested solutions
The indicator lamp in the
9or
2 button of the Thermatic*/
Thermotronic *control panel is lit.
The cooling system cannot be
switched on. Cooling has been deactivated
due to a malfunction. X
Visit a qualified specialist workshop. The indicator lamp in the
¯
rear-window heating button is
flashing. The rear-window heat-
ing has switched itself off prema -
turely or cannot be switched on. There is insufficient voltag
e
because too many consumers are
switched on. X
Switch off consumers that are not required, e.g. reading lamps ,
interior lighting, etc .
The rear-window heating will automatically switch back on as soon
as there is sufficient voltage again. The
75 PASSENGER
AIRBAG OFF warning lamp on the
centre console is lit. A special Mercedes-Benz child
seat with automatic child seat
recognition has been fitted to the
front-passenger seat. The front-
passenger airbag has therefore
been disabled. Practical advice
* optional
171_AKB; 3; 4, en-GB
vpfaff7,
2007-11-13T10:50:25+01:00 - Seite 191 Z
Page 196 of 273

Troubleshooting
19
3 Indicator and warning lamps in the instrument cluster
Problem Possible cause/consequence Suggested solutions
-
The yellow ABS warning
lamp comes on while the
engine is running. G
Risk of accident
ABS has been deactivated due to
a malfunction. Therefore, ESP ®
and BAS are also deactivated, for
example .
The brake system continues to
function normally, but without
electronic support. The wheels
could therefore lock if you brake
hard, for example. X
Drive on carefully.
X Observe the additional messages in the multi-function display
(Y page 174).
X Visit a qualified specialist workshop as soon as possible. -
The yellow ABS warning
lamp comes on while the
engine is running. G
Risk of accident
ABS has been deactivated due to
undervoltage. It is possible that
the battery is not being charged.
Therefore, ESP ®
and BAS are also
deactivated, for example .
The brake system continues to
function normally, but without
electronic support. The wheels
could therefore lock if you brake
hard, for example. X
Switch off consumers that are not required, e.g. reading lamps ,
interior lighting, etc .
ABS will be available again as soon as the vehicle's electrical sys-
tem voltage increases . Practical advice
171_AKB; 3; 4, en-GB
vpfaff7,
2007-11-13T10:50:25+01:00 - Seite 193 Z
Page 198 of 273

Troubleshooting
19
5 Problem Possible cause/consequence Suggested solutions
3
The red brake system
warning lamp comes on
while the engine is run-
ning. G
Risk of accident
There is insufficient brake fluid in
the fluid reservoir. X
Do not continue driving under any circumstances .
X Consult a qualified specialist workshop immediately.
X Observe the additional messages in the multi-function display
(Y page 174).
X Under no circumstances should you top up the brake fluid. This will
not rectify the fault. ±
The yellow engine diagnos-
tics warning lamp comes
on while the engine is run-
ning. There may be a malfunction:
R
in the fuel injection system
R in the exhaust system
R in the ignition system
The emission limit values may be
exceeded and the engine may be
running in emergency mode. X
Have the vehicle checked as soon as possible at a qualified spe -
cialist workshop. <
The red seat belt warning
lamp lights up for 6 sec-
onds after the engine
starts up 27
. The seat belt warning lamp
reminds the driver and front
passenger to fasten their seat
belts. X
Fasten your seat belt (Y page 69). <
After the engine starts yo u
will hear a warning tone for
up to 6 second s27
. G
Risk of injury
The driver's seat belt is not fas -
tened. X
Fasten your seat belt (Y page 69).
The warning tone ceases. 27
Only for certain countries. Practical advice
171_AKB; 3; 4, en-GB
vpfaff7,
2007-11-13T10:50:25+01:00 - Seite 195 Z
Page 199 of 273

Troubleshooting
19
6 Problem Possible cause/consequence Suggested solutions
<
The red seat belt warning
lamp lights up after start -
ing the engine, as soon as
the driver's door or the
front-passenger door is
closed. G
Risk of injury
The driver or front passenger ha s
not fastened their seat belt. X
Fasten your seat belt (Y page 69).
The warning lamp goes out. G
Risk of injury
There are objects on the front-
passenger seat. X
Remove the objects from the front-passenger seat and stow them
safely.
The warning lamp goes out .<
The red seat belt warning
lamp flashes and you hear
an intermittent warning
tone. G
Risk of injury
The driver or front passenger ha s
not fastened their seat belt. At
the same time, you are driving
faster than 25 km/h or have
briefly driven faster tha n
25 km/h. X
Fasten your seat belt (Y page 69).
The warning lamp goes out and the intermittent warning ton e
ceases . G
Risk of injury
There are objects on the front-
passenger seat. At the same
time, you are driving faster than
25 km/h or have briefly driven
faster than 25 km/h . X
Remove the objects from the front-passenger seat and stow them
safely.
The warning lamp goes out and the intermittent warning tone
ceases . Practical advice
171_AKB; 3; 4, en-GB
vpfaff7,
2007-11-13T10:50:25+01:00 - Seite 196