Page 209 of 293

Display
messages 206 Display messages Possible cause/consequence Possible solution
. Main-beam left
or
Main-beam right The left-hand or right-hand main-beam
headlamp is fa
ulty. X
Visit a qualified specialist workshop. . 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 235).. Remove key You have left the key in the ignition lock. X
Remove the key from the ignition lock. . Switch off lights
or remove key You have left the key in the ignition lock. X
Remove the key from the ignition lock. . Fog-lamp left
or
Fog-lamp right The front left-hand or right-hand foglamp
is faulty. X
Visit a qualified specialist workshop. . Rear foglamp Back-
up bulb on The rear foglamp is faulty. Another lamp
has taken over its function. X
Replace the bulb (Y page 235).. Parking lamp front
left Back-up bulb
on
or
Parking lamp front
right Back-up bulb
on The front left-hand or right-hand parking
lamp is faulty. Another lamp has taken
over its function. X
Replace the bulb (Y page 235).Practical advice
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Display
messages 207Display messages Possible cause/consequence Possible solution
. Reversing lamp The reversing lamp is fa
ulty. X
Replace the bulb (Y page 235). . Tail lamp left
Back-up bulb on
or
Tail lamp right
Back-up bulb on The left-hand or right-hand tail lamp is
faulty. Another lamp has taken over its
function. X
Replace the bulb (Y page 235). ò Replace air
cleaner The engine air filter must be replaced. X
Visit a qualified specialist workshop. N Check eng. oil
level when next
refuelling The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 159) and top
up the engine oil if necessary.
X Have the engine checked for leaks if the engine
oil needs topping up more often than usual. N Engine oil level
Stop car Turn eng.
off There is insufficient oil in the engine.
There is a danger of engine damage. X
Stop the vehicle. Pay attention to traffic con-
ditions as you do so.
X Switch off the engine.
X Top up the engine oil and check the level
(Y page 159). N Engine oil level
Consult workshop You have added too much engine oil.
There is a risk of damaging the engine or
catalytic converter. X
Siphon off excess engine oil until it is at the
specified level. Observe the legal require-
ments. N Engine oil level
Consult workshop There is water in the engine oil. X
Have the engine oil checked. Practical advice
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Display
messages 208 Display messages Possible cause/consequence Possible solution
N Engine oil level
Consult workshop The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 159) and top
up the engine oil if necessary.
X Have the engine checked for leaks if the engine
oil needs topping up more often than usual. N Cannot measure
engine oil level The measuring system is faulty. X
Visit a qualified specialist workshop. I Replace key The key no longer functions. X
Visit a qualified specialist workshop. ( Lock driver's seat
or
Lock front-pass.
seat The seat backrest is not engaged. X
Push the backrest back until it engages. Ñ Cr. control and
SPEED-TRONIC inop-
erative Speedtronic and cruise control are
unavailable. X
Visit a qualified specialist workshop. 4 Reserve fuel level The fuel level has fallen below the reserve
range. The operation of the auxiliary heat-
ing* can no longer be guaranteed. X
Refuel at the nearest filling station. t Telephone Enter
PIN
or
TEL PIN? You have not yet logged on to your mobile
phone*. X
Enter the PIN for the SIM card. Practical advice
* optional
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Display
messages 209Display messages Possible cause/consequence Possible solution
t Function unavaila-
ble Yo
u have pressed the sort but-
ton on the multi-function steering wheel
although your vehicle is not equipped with
a mobile phone*. W Top up washer fluid The washer fluid level in the washer fluid
reservoir has dropped below the mini-
mum. X
Top up the washer fluid ( Ypage 162). < Your seat belt is not fastened. This mes-
sage reminds you to fasten your seat belt. X
Fasten your seat belt (Y page 71). Practical advice
* optional
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Troubleshooting
210 Troubleshooting
Points to remember
G
Risk of accident and injury
If maintenance work is carried out incorrectl y this can jeopardise the operating safety of your vehicle. You risk losing control of your vehicle
and thereby causing an accident. The safety systems may also no longer be able to protect you or others as they are designed to do.
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, all work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop. Warning and indicator 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 automatically. 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 indicator lamp in the
9
button on the Thermatic control
panel is on or flashes when you
press the button. The cooling sys-
tem cannot be switched on. The cooling system is losing
refrigerant. X
Visit a qualified specialist workshop. Practical advice
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Troubleshooting
211Problem Possible cause/consequence Suggested solutions
The indicator lamp in the
F
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 voltage
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
5 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. Therefore,
the front-passenger airbag has
been disabled. The
5 PASSENGER AIRBAG
OFF warning lamp on the centre
console is lit. G
Risk of injury
There is no child seat fitted to the
front-passenger seat. The auto-
matic child seat recognition is
malfunctioning. X
Onl y use a rearward-facing child restraint system on the rear seat.
X Remove electronic equipment from the front-passenger seat, e.g.:
R
notebooks
R mobile phones
R cards with transponders, e.g. ski passes or access passes
If the 5 PASSENGER AIRBAG OFF warning lamp is still lit:
X Visit a qualified specialist workshop. Practical advice
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Troubleshooting
212 Warning and indicator lamps in the instrument cluster
Problem Possible cause/consequence Suggested solutions
-
Theyellow ABS warning
lamp comes on while the
engine is running. G
Risk of accident
ABS has been deactivated due to
a malfunction. ESP ®
, BAS and the
tyre pressure monitor* are there-
fore also deactivated.
The brake system continues to
function normally, but without
electronic support. Therefore,
the wheels could lock if you brake
hard.
If the ABS control unit is faulty,
there is also a possibility of mal-
functions in other systems, such
as the ultrasonic reversing aid ®
,
the navigation system ®
or the
automatic transmission. X
Drive on carefully.
X Observe the additional messages in the multi-function display
(Y page 194).
X Visit a qualified specialist workshop as soon as possible. Practical advice
* optional
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Troubleshooting
213Problem Possible cause/consequence Suggested solutions
-
Theyellow 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, the following systems
are, for example, also deactiva-
ted: ESP ®
, BAS, 4ETS and the tyre
pressure monitor*.
The brake system continues to
function normally, but without
electronic support. The wheels
could therefore lock if you brake
hard. 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.
X Observe the additional messages in the multi-function display
(Y page 194). You have engaged the differential
locks. X
Disengage the differential locks.
Subsequently ABS is reactivated. v
The yellow ESP ®
warning
lamp flashes while the
vehicle is in motion. G
Risk of accident
ESP ®
, ABS or traction control has
intervened because at least one
wheel has reached its grip limit
and is threatening to spin or lock. X
Only depress the accelerator pedal as far as necessary when pull-
ing away.
X Release the accelerator pedal while you are driving.
X Adapt your driving style to suit the road and weather conditions.
X Do not deactivate ESP ®
.
Exceptions: (Y page 48) Practical advice
* optional
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