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2 Display messages Possible cause/consequence Possible solution
D Coolant Stop,
switch engine off The poly-V-belt may have torn. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Switch off the engine.
X Check the poly-V-belt .
X If it has torn: do not drive on. Contact th e
nearest qualified specialist workshop .
X If it is not damaged :do not start the engin e
again until the message disappears. There is
otherwise a risk of engine damage. B Top up coolant See
Owner's Manual The coolant level is too low. X
Top up the coolant, observing the warning
notes before doing so (Y page 154).
X Have the coolant system checked at a qualified
specialist workshop if the coolant needs top-
ping up more often than usual .. Dipped beam, left
or
Dipped beam, right The right-hand or left-hand dipped-beam
headlamp is faulty. X
Halogen headlamp: replace the bulb
( Y page 213).
X Bi-xenon headlamp* :visit a qualified special-
ist workshop. Practical advice
* optional
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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
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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
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5 Display messages Possible cause/consequence Possible solution
. Front foglamp,
left
or
Front foglamp,
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. X
Replace the bulb (Y page 213). . 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. X
Replace the bulb (Y page 213). . Reversing lamp,
left
or
Reversing lamp,
right The left-hand or right-hand reversing lamp
is faulty. X
Replace the bulb (Y page 213). Practical advice
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. Left-hand tail
lamp Back-up bulb
on
or
Right-hand tail
lamp Back-up bulb
on The left-hand or right-hand tail lamp is
faulty. X
Visit a qualified specialist workshop. N Check eng. oil
level when next
refuelling Vehicles with an oil dipstick: the engine oil
level has dropped to a critical level. X
Check the engine oil level (Y page 151 )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 Add 1 litre engine
oil when next refu-
elling Vehicles without an oil dipstick: the
engine oil level is too low. X
Check the engine oil level (Y page 151 )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, switch
engine off Vehicles without a dipstick: there is not
enough oil in the engine. There is a danger
of engine damage. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Switch off the engine.
X Top up the engine oil and check the level
(Y page 151). Practical advice
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N Engine oil level
Reduce oil level Vehicles without an oil dipstick: you have
added too much engine oil. There is a risk
of damaging the engine or catalytic con-
verter. X
Siphon off excess engine oil until it is at the
specified level. Observe the legal require-
ments. N Cannot measure
engine oil level Vehicles without an oil dipstick: the meas-
uring system is faulty. X
Visit a qualified specialist workshop. ± Display malfunc-
tion Drive to work-
shop One or more electronic systems are
unable to deliver information to the on-
board computer. The following systems
may have failed:
R
Coolant temperature gauge
R Rev counter
R Cruise control or Speedtronic display X
Visit a qualified specialist workshop. I Remove key You have left the key in the ignition lock. X
Remove the key. I Please replace key The key no longer functions. X
Visit a qualified specialist workshop. 4 Reserve fuel The fuel level has fallen below the reserve
range. X
Refuel at the nearest filling station .t Enter 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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B
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8 Display messages Possible cause/consequence Possible solution
t Bluetooth ready The Bluetooth connection between your
mobile phone and the audio system* or
COMAND APS* is not activated. X
If desired, activate the Bluetooth connection
between your mobile phone and the audio sys-
tem* or COMAND APS* – please refer to the
separate operating instructions. t No telephone
inserted Your mobile phone is not inserted in the
bracket*. X
Insert the mobile phone into the
bracket* (Y page 141). K Vario-roof Opera-
tion only at stand-
still You tried to open the roof while the vehicle
was moving. X
Stop safely when traffic conditions allow and
operate the soft top again. K Vario-roof lower-
ing The roof is not fully opened or closed. The
hydraulics are depressurised. X
Fully open or close the roof .K Open / close Vario-
roof completely The roof is not locked. X
Stop in accordance with the traffic conditions .
X Push or pull the roof switch (Y page 133), until
the roof is fully open or closed. K Vario-roof opera-
tion Please wait The on-board voltage is too low. X
Start the engine. The roof has been opened and closed sev
-
eral times in a row. The roof drive has been
switched off automatically for safety rea-
sons. You can open and close the roof again after
approximately ten minutes.
X
Switch off the ignition and turn it back on.
X Repeat the opening or closing procedure .Practical advice
* optional
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9 Display messages Possible cause/consequence Possible solution
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 (Y page 154). Practical advice
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