Page 276 of 401
Display
messages 273Display messages Possible cause/consequence Possible solution
. 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. . 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 135).
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
Visit a qualified specialist workshop. . Turn signal in
left-hand mirror
or
Turn signal in
right-hand mirror The turn signal lamp on the left-hand or
right-hand exterior mirror is faulty. This
display message will only appear if all
LEDs have failed. X
Visit a qualified specialist workshop. Practical advi
ce
211_AKB; 2; 5, en-GB
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Page 277 of 401
Display
messages 274 Display messages Possible cause/consequence Possible solution
. 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 311). . 3rd brake lamp The third brake lamp is faulty. This display
message will only appear if all LEDs have
failed. X
Visit a qualified specialist workshop. . Left brake-/tail
lamp Back-up bulb
on
or
Right brake-/tail
lamp Back-up bulb
on The left-hand or right-hand rear brake
lamp is faulty. This display message 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 311). . Intell. Light Sys-
tem inoperative
The Intelligent Light System* is faulty. The
lights remain available without the Intelli-
gent Light System*. X
Visit a qualified specialist workshop. Practical advi
ce
* optional
211_AKB; 2; 5, en-GB
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Page 278 of 401
Display
messages 275Display messages Possible cause/consequence Possible solution
. Left-hand licence
plate lamp
or
Right-hand licence
plate lamp The left-hand or right-hand licence plate
lamp is faulty. X
Replace the bulb (Y page 311). . 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. . Front left-hand
foglamp
or
Front right-hand
foglamp 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
Visit a qualified specialist workshop. Practical advi
ce
211_AKB; 2; 5, en-GB
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Page 279 of 401
Display
messages 276 Display messages Possible cause/consequence Possible solution
. Front left-hand
parking lamp Back-
up bulb on
or
Front right-hand
parking lamp Back-
up bulb on The front left-hand or right-hand parking
lamp is faulty. X
Halogen headlamp: replace the bulb
(Y page 311).
X Bi-xenon headlamp*: visit a qualified special-
ist workshop. . Left-hand revers-
ing lamp
or
Right-hand revers-
ing lamp The left-hand or right-hand reversing lamp
is faulty. X
Visit a qualified specialist workshop. . 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. ò Replace air
cleaner The engine air filter must be replaced. X
Visit a qualified specialist workshop. Practical advi
ce
* optional
211_AKB; 2; 5, en-GB
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Page 280 of 401
Display
messages 277Display messages Possible cause/consequence Possible solution
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 223) 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 The engine oil level is too low. X
Check the engine oil level (Y page 223) 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 vehicle, turn
engine off There is insufficient 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 223). N Engine oil level
Reduce oil level 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 Cannot measure
engine oil level The measuring system is faulty. X
Visit a qualified specialist workshop. Practical advi
ce
211_AKB; 2; 5, en-GB
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Page 281 of 401
Display
messages 278 Display messages Possible cause/consequence Possible solution
± Display malfunc-
tion Consult 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. H Tyre pressure Cau-
tion Tyre defect
G
Risk of accident
One or more tyres is losing air rapidly. 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 317).Practical advi
ce
* optional
211_AKB; 2; 5, en-GB
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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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Page 283 of 401
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
211_AKB; 2; 5, en-GB
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