Page 273 of 373
Display
messages 270 Display messages Possible cause/consequence Possible solution
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 223).
X Have the coolant system checked at a qualified
specialist workshop if the coolant needs top-
ping up more often than usual. . Left-hand Corner-
ing light
or
Right-hand Corner-
ing light The left-hand and/or right-hand cornering
lamp* is faulty. X
Replace the bulb (Y page 306).. Left-hand dipped
beam
or
Right-hand dipped
beam The right-hand or left-hand dipped-beam
headlamp is faulty. X
Halogen headlamp: replace the bulb
(Y page 306).
X Bi-xenon headlamp*: visit a qualified special-
ist workshop. . 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 132).
X Switch the lights on and off using the light
switch. . Trailer Left-hand
turn signal
or
Trailer Right-hand
turn signal There is a malfunction in the left- or right-
hand windowbag. X
Replace the bulb. Practical advi
ce
* optional
251_AKB; 5; 7, en-GB
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Page 274 of 373
Display
messages 271Display messages Possible cause/consequence Possible solution
. Trailer brake lamp The trailer brake lamp is faulty. X
Replace the bulb. . Trailer Left-hand
tail lamp
or
Trailer Right-hand
tail lamp The left-hand or right-hand trailer tail lamp
is faulty. X
Replace the bulb. . Turn signal, rear
left
or
Turn signal, rear
right The rear left-hand or rear right-hand turn
signal is faulty. X
Replace the bulb (Y page 306). . Turn signal in mir-
ror, left
or
Turn signal in mir-
ror, right 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. . Turn signal, front
left
or
Turn signal, front
right The front left-hand or right-hand turn sig-
nal is faulty. X
Replace the bulb (Y page 306). Practical advi
ce
251_AKB; 5; 7, en-GB
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Page 275 of 373
Display
messages 272 Display messages Possible cause/consequence Possible solution
. Left-hand brake
lamp
or
Right-hand brake
lamp The left-hand or right-hand brake lamp is
faulty. X
Replace the bulb (Y page 306).. 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
Halogen headlamp: replace the bulb
(Y page 306).
X Bi-xenon headlamp*: visit a qualified special-
ist 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 306).. Switch off lights 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. Practical advi
ce
* optional
251_AKB; 5; 7, en-GB
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Page 276 of 373
Display
messages 273Display 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 left-hand
foglamp
or
Rear right-hand
foglamp The left-hand or right-hand rear foglamp is
faulty. X
Replace the bulb (Y page 310). . Parking lamp,
front left
or
Parking lamp,
front right The front left-hand or right-hand parking
lamp is faulty. X
Replace the bulb (Y page 306). . Reversing lamp,
left
or
Reversing lamp,
right The left-hand or right-hand reversing lamp
is faulty. X
Replace the bulb (Y page 306). . Left-hand tail
lamp
or
Right-hand tail
lamp The left-hand or right-hand tail lamp is
faulty. X
Replace the bulb (Y page 306). Practical advi
ce
251_AKB; 5; 7, en-GB
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Page 277 of 373
Display
messages 274 Display messages Possible cause/consequence Possible solution
ò Replace air
cleaner element The engine air filter must be replaced. X
Visit a qualified specialist workshop. N Check engine oil
level when next
refuelling The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 222) 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
Consult workshop The engine oil level has dropped to a crit-
ical level or the measuring system is mal-
functioning.
33 X
Check the engine oil level (Y page 222).
If the engine oil level is OK:
X Visit a qualified specialist workshop.
If the engine oil level is not OK:
X Top up the engine oil.
X If the warning message disappears: consult a
qualified specialist workshop.
X If the warning message does not disappear: do
not drive on. Consult the nearest qualified spe-
cialist workshop. H Tyre pressure Cau-
tion, tyre defect
G
Risk of accident
At least one tyre is rapidly deflating. The
affected wheel is highlighted in the tyre
pressure display of the tyre pressure mon-
itor*. X
Stop the vehicle without making any sudden
steering or braking manoeuvres. Pay attention
to the traffic conditions as you do so.
X Repair or change the tyre (Y page 313).33
Only for certain vehicles. Practical advi
ce
* optional
251_AKB; 5; 7, en-GB
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Page 278 of 373
Display
messages 275Display messages Possible cause/consequence Possible solution
H Tyre pressure
Check tyres G
Risk of accident
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 313).
X Check the tyre pressure and correct it if nec-
essary (Y page 226).
The warning will disappear automatically after
you have been driving for a few minutes with
the corrected tyre pressure. H Please correct
tyre pressure(s) Vehicles with a tyre pressure monitor*:
the pressure of at least one tyre is too low
or there is a significant discrepancy
between the tyre pressures of the individ-
ual wheels. X
Check the tyre pressure at the next opportunity
and correct it if necessary ( Ypage 226). I Change key batter-
ies The KEYLESS GO* key batteries are dis-
charged. X
Change the batteries (Y page 305).I Key does not belong
to vehicle You have put the wrong key in the ignition
lock. X
Use the correct key. I Key not detected
The KEYLESS GO* key is not in the vehicle.
If the engine is switched off, the vehicle
can no longer be locked centrally and the
engine cannot be started. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Look for the KEYLESS GO *key. Practical advice
* optional
251_AKB; 5; 7, en-GB
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Page 279 of 373
Display
messages 276 Display messages Possible cause/consequence Possible solution
I Key not detected
The KEYLESS GO* key is not detected
while the engine is running, due to radio
interference. 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. I Key not detected
The KEYLESS GO* key cannot be detec-
ted. 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 detected in
vehicle
The KEYLESS GO key* has been detected
in the vehicle during locking. X
Remove the KEYLESS GO key* from the vehi-
cle. I You need a new key The key no longer functions. X
Visit a qualified specialist workshop. I Pull starting but-
ton out then insert
key Continuously unable to detect the KEY-
LESS GO key*. X
Operate your vehicle using the KEYLESS GO*
key in the ignition lock.
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. Practical advi
ce
* optional
251_AKB; 5; 7, en-GB
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Page 280 of 373
Display
messages 277Display messages Possible cause/consequence Possible solution
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. ¿ There is only a small amount of fuel in the
fuel tank. X
Refuel at the nearest filling station. 4 Reserve fuel 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 Please enter PIN You have not yet logged on to your mobile
phone*. X
Enter the PIN for the SIM card. 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 mobile phone into the
bracket* ( Ypage 208). W Top up washer fluid The washer fluid level has dropped to
approximately
1
/ 3 of the total reservoir
capacity. X
Top up the washer fluid (Y page 223). Practical advi
ce
* optional
251_AKB; 5; 7, en-GB
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