Page 267 of 401
Display
messages 264 Display messages Possible cause/consequence Possible solution
Tyre pressure Check tyres
G
Risk of accident
The tyre pressure loss warning system has
detected a significant pressure loss. 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 Check the tyre pressure and correct it if nec-
essary (Y page 229).
X Repair or change the faulty wheel as necessary
(Y page 317).
X Then restart the tyre pressure loss warning
system once the tyre pressure is correct
(Y page 230). Run Flat Indi-
cator inoperative The tyre pressure loss warning system is
deactivated due to a malfunction. X
Visit a qualified specialist workshop. Check tyres, then restart Run
Flat Indicator There was a tyre pressure warning mes-
sage. X
Make sure that the pressure set is correct for
all tyres (Y page 229).
X Then restart the tyre pressure loss warning
system (Y page 230). HOLD off HOLD has been deactivated. The vehicle
is skidding or a condition for activating
SBC HOLD is no longer met when the
brake pedal is firmly depressed. X
Reactivate HOLD later. Practical advi
ce
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Page 272 of 401
Display
messages 269Display messages Possible cause/consequence Possible solution
3 Brake immediately A malfunction occurred with HOLD acti-
vated.
or
Vehicles with manual transmission: with
HOLD activated, you have either:
R
opened the driver’s door and released
the seat belt or
R switched off the engine or
R opened the bonnet
The horn may also sound at regular inter-
vals. The horn becomes louder if you
attempt to lock the vehicle.
The engine cannot be started. X
Immediately depress the brake pedal firmly
until the warning message in the multi-function
display disappears.
X Prevent the vehicle from rolling away before
you leave it (Y page 113).
The engine can be started again. 3 EBV, ABS, ESP inop-
erative See Own-
er's Manual G
Risk of accident
EBV, ABS and ESP ®
are unavailable due to
a malfunction. BAS has also been deacti-
vated. PRE-SAFE ®
is therefore also not
operational.
The brake system is still available with
complete brake boosting effect. X
Drive on carefully.
X Visit a qualified specialist workshop immedi-
ately. Practical advi
ce
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Page 275 of 401
Display
messages 272 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 225).
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
Visit a qualified specialist workshop. . 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 311).
X Bi-xenon headlamp*: visit a qualified special-
ist workshop. . Left-hand trailer
turn signal
or
Right-hand trailer
turn signal The left-hand or right-hand trailer turn sig-
nal is faulty. X
Replace the bulb. . Trailer brake lamp The trailer brake lamp is faulty. X
Replace the bulb. Practical advi
ce
* optional
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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 285 of 401
Troubleshooting
282 Troubleshooting
Points to remember
G
Risk of accident and injury
The operating safety of the vehicle could be impaired if service work is carried out incorrectly. There is a risk that you could lose control of
the vehicle and cause an accident. The safety systems may 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, work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop. Indicator and warning lamps in switches and buttons
Problem Possible cause/consequence Suggested solutions
One or all of the indicator lamps
in the seat ventilation* button are
flashing. There is insufficient voltage
because too many consumers are
switched on. The seat ventila-
tion* has switched itself off auto-
matically. X
Switch off consumers that are not required, e.g. reading lamps,
interior lighting, etc.
The seat ventilation* will automatically switch back on as soon as
there is sufficient voltage again. 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 automati-
cally. 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. Practical advice
* optional
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Page 286 of 401
Troubleshooting
283Problem Possible cause/consequence Suggested solutions
The steering wheel heating* indi-
cator lamp on the lower left lever
of the steering column is flashing. There is insufficient voltage
because too many consumers are
switched on. The steering wheel
heating* has switched itself off
automatically. X
Switch off consumers that are not required, e.g. reading lamps,
interior lighting, etc.
The steering wheel heating* will automatically switch back on as
soon as there is sufficient voltage again. The indicator lamp in the
2
button on the Thermatic/4-zone
Thermotronic* control panel
flashes three times when you
press the button. The cooling sys-
tem cannot be switched on. Cooling has been deactivated
due to a malfunction. X
Visit a qualified specialist workshop. The indicator lamp in the
¯
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. Vehicles with automatic child
seat recognition on the front-
passenger seat*:
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. The front-
passenger airbag has therefore
been disabled. Practical advice
* optional
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Page 287 of 401
Troubleshooting
284 Problem Possible cause/consequence Suggested solutions
Vehicles with automatic child
seat recognition on the front-
passenger seat*:
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
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
* optional
211_AKB; 2; 5, en-GB
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Page 288 of 401
Troubleshooting
285Indicator and warning lamps in the instrument cluster
Problem Possible cause/consequence Suggested solutions
-
The yellow ABS warning
lamp comes on while the
engine is running. G
Risk of accident
ABS is unavailable due to a mal-
function. Therefore, Brake Assist,
ESP ®
, EBV and PRE-SAFE ®
are,
for example, also deactivated.
The brake system continues to
function normally, but without
electronic support. The 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 257).
X Visit a qualified specialist workshop as soon as possible. v
The yellow ESP ®
warning
lamp is lit while the engine
is running. G
Risk of accident
ESP ®
is deactivated. ESP ®
will
not stabilise the vehicle if it starts
to skid or if a wheel starts to spin. X
Reactivate ESP ®
(Y page 60).
Exceptions: ( Ypage 60).
X Adapt your driving style to suit the road and weather conditions. v
The yellow ESP ®
warning
lamp is lit while the engine
is running. G
Risk of accident
ESP ®
is unavailable due to a mal-
function. ESP ®
will not stabilise
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 258).
X Drive on carefully.
X Visit a qualified specialist workshop. Practical advice
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