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Display
messages 24
9 Display messages Possible cause/consequence Possible solution
- ABS and ESP inoper-
ative See Owner's
Manual
G
Risk of accident
ABS, ESP ®
, BAS, PRE–SAFE ®
*, hill start
assist and ESP ®
trailer stabilisation ar e
unavailable due to a malfunction. The
v warning lamp also lights up in th e
instrument cluster.
The brake system continues to function
normally, but without the functions listed
above. X
Drive on carefully.
X Visit a qualified specialist workshop. \ Trailer tow hitch
Check lock mecha-
nism
The trailer tow hitch* is not correctly
engaged. A warning tone also sounds. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Allow the ball coupling to engage in the end
position (Y page 220). # The battery is not being charged. Possible
causes:
R
faulty alternator
R torn poly-V-bel t
R malfunction in the electronics X
Stop immediately and safely when traffic con-
ditions allow and 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 :have the vehicle checked
as soon as possible at a qualified specialist
workshop. Practical advice
* optional
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Display
messages 26
7 Display messages Possible cause/consequence Possible solution
. Switch off lights
or remove key The light switch is set to the
*position
or the daytime driving lights are switched
on and you have not removed the key. The
side lamps remain switched on. A warning
tone also sounds. X
Remove the key from the ignition lock.
or
X Turn the light switch to M. ò 4-button multi-function
steering wheel:
Replace air
cleane
r
12-button luxury multi-
function steering
wheel:
Replace air
cleane r The engine air filter must be replaced. X
Visit a qualified specialist workshop. N 4-button multi-function
steering wheel:
Check eng. oil
level
12-button luxury multi-
function steering
wheel:
Check eng. oil lev.
when next refuel
-
ling The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 208 )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 . Practical advice
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Display
messages 26
8 Display messages Possible cause/consequence Possible solution
I 4-button multi-function
steering wheel:
Change batter
y
12-button luxury multi-
function steering
wheel:
Change key batter -
ies The KEYLESS GO* key batteries are dis-
charged. X
Change the batteries (Y page 304). I Key not detected
The KEYLESS GO key* is not detected
while the engine is running because it is
not inside the vehicle or because of strong
radio interference. A warning tone also
sounds.
Once the engine is switched off, you will
no longer be able to lock the vehicle cen-
trally or start the engine. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Locate the KEYLESS GO key* or operate the
vehicle using the key in the ignition lock. 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. Practical advice
* optional
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Display
messages 26
9 Display messages Possible cause/consequence Possible solution
I 4-button multi-function
steering wheel:
Key still in vehi-
cle
12-button luxury multi-
function steering
wheel:
Key still in vehi-
cle
The KEYLESS GO key* was detected in the
vehicle when you attempted to lock the
vehicle. X
Remove the KEYLESS GO key* from the vehi-
cle . I 4-button multi-function
steering wheel:
You need a new key
12-button luxury multi-
function steering
wheel:
Replace key The key no longer functions. X
Visit a qualified specialist workshop. I Key does not belong
to vehicle You have put the wrong key in the ignition
lock. X
Use the correct key. I Close doors to lock
vehicle Not all doors were closed as you attemp-
ted to lock the vehicle. A warning tone
also sounds. X
Close all doors and lock the vehicle again . Practical advice
* optional
204_AKB; 2; 3, en-GB
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Display
messages 27
0 Display messages Possible cause/consequence Possible solution
I 4-button multi-function
steering wheel:
Insert key
12-button luxury multi-
function steering
wheel:
Remove starting
button, then
insert key
KEYLESS GO* has malfunctioned or is
faulty. A warning tone also sounds. X
Pull out the KEYLESS GO* button from the igni-
tion lock (Y page 86).
X Start your vehicle using the KEYLESS GO* key
in the ignition lock. ? Rear left seat
backrest not
locked
or
Rear right seat
backrest not
locked The rear seat backrest is not engaged on
the left-hand or right-hand side. A warning
tone also sounds. X
Fully engage the rear seat backrest
(Y page 186). Practical advice
* optional
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Troubleshooting
27
9 Indicator and warning lamps in the instrument cluster
Problem Possible cause/consequence Suggested solutions
-
The yellow ABS warning
lamp lights up while the
engine is running. G
Risk of accident
ABS, ESP ®
, BAS, PRE–SAFE ®
*,
hill start assist and ESP ®
trailer
stabilisation are unavailable du e
to a malfunction.
The brake system continues to
function normally, but without
the functions listed above. Th e
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 236).
X Visit a qualified specialist workshop as soon as possible. v
The yellow ESP ®
warning
lamp lights up while th e
engine is running. G
Risk of accident
ESP ®
is deactivated. ES P®
will
not stabilise the vehicle if it start s
to skid or if a wheel starts to spin. X
Reactivate ES P®
(Y page 68).
Exceptions (Y page 68).
X Adapt your driving style to suit the road and weather conditions. G
Risk of accident
ESP ®
is not available due to a
malfunction. ESP ®
will not stabi-
lise the vehicle if it starts to skid
or if a wheel starts to spin . X
Observe the additional messages in the multi-function display
(Y page 236).
X Drive on carefully.
X Visit a qualified specialist workshop. Practical advice
* optional
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Troubleshooting
28
6 Warning tone
s Problem Possible cause/consequence Suggested solutions
The anti-theft alarm system* is
suddenly triggered. You have opened the vehicle
using the emergency key element
without deactivating the anti-
theft alarm system* first. Key:
X
Press the Œor the ‹button.
or
X Insert the key into the ignition lock.
The alarm is deactivated.
KEYLESS GO* :
X Grasp the exterior door handle. The KEYLESS GO key* must be
outside the vehicle .
The alarm is deactivated.
or
X Press the KEYLESS GO button* on the dashboard. The KEYLESS
GO key* must be inside the vehicle.
The alarm is deactivated. You hear a warning tone. A message appears in the multi-
function display. X
See the explanations for the display message (Y page 236). You hear a warning tone. You are driving with the parkin
g
brake on. X
Release the parking brake. Practical advice
* optional
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6
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Troubleshooting
28
8 Problem Possible cause/consequence Suggested solutions
The NECK-PRO head restraint
s
on the driver's and front-
passenger seats have been trig-
gered. Your vehicle has been involved in
a rear-end collision. X
Reset the NECK-PRO head restraints (Y page 303). Fuel and fuel tan
kProblem Possible cause/consequence Suggested solutions
Fuel is leaking from the vehicle.
G
Risk of fire
The fuel line or the fuel tank is
defective. X
Turn the key to position 0in the ignition lock immediately and
remove it.
X Do not restart the engine under any circumstances .
The leaking fuel creates a risk of fire or explosion.
X Consult a qualified specialist workshop. The fuel filler flap cannot be
opened. The fuel filler flap is not released. X
Unlock the vehicle (Y page 300). The opening mechanism is jam-
med. X
Release the fuel filler flap by hand (Y page 302).
X Consult a qualified specialist workshop. Practical advice
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8
