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334 Practical hints
What to do if …
On the pages that follow, you will find a
compilation of the most important warning
and malfunction messages that may
appear in the multifunction display.
For your convenience the messages are
divided into two sections:
Text messages (page 335)
Symbol messages (page 343)
Warning!G
No messages will be displayed if either the
instrument cluster or the multifunction
display is inoperative.
As a result, you will not be able to see infor-
mation about your driving conditions, such
as speed or outside temperature,
warning/indicator lamps,
malfunction/warning messages or the
failure of any systems. Driving
characteristics may be impaired.
If you must continue to drive, please do so
with added caution. Visit an authorized
Mercedes-Benz Center as soon as possible.
iSwitching on the ignition causes all
instrument cluster lamps (except low beam
headlamp indicator lamp, high beam headlamp
indicator lamp, and turn signal indicator lamps
unless activated) as well as the multifunction dis-
play to come on. Make sure the lamps and multi-
function display are in working order before
starting your journey.
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335 Practical hints
What to do if …
Text messages
Display messagePossible cause/consequencePossible solution
ABSABS, ESP
inoperative
See
Operator’s
ManualThe ABS and ESP® are not available due to
a malfunction.
The BAS is also deactivated.
The brake system is still functioning
normally but without but without the
systems specified above.Continue driving with added caution.
Wheels will lock during hard braking,
reducing steering capability.
Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
Cruise cont.
and SPEED-
TRONICinoperativeCruise control is malfunctioning.Have the cruise control checked by an au-
thorized Mercedes-Benz Center.
ESPinoperative
See
Operator’s
ManualThe ESP® has switched off due to a
malfunction.
The ABS and the BAS might not be opera-
tional.
The brake system is still functioning
normally but without the systems speci-
fied above.Continue driving with added caution.
Contact an authorized Mercedes-Benz
Center as soon as possible.
Failure to follow these instructions
increases the risk of an accident.
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336 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
ESPunavailable
See
Operator’s
ManualThe ESP is temporarily not available.
The system’s self-diagnosis may not be
completed yet.
The ABS and the BAS might not be
operational.
The brake system is still functioning normally
but without the systems specified above.Drive a short distance with added
caution at a vehicle speed of above
12 mph (20 km/h).
When the message disappears, the
ESP
® is available again.
If the message does not disappear:
Continue driving with added caution.
Have the system checked at an autho-
rized Mercedes-Benz Center as soon as
possible.
Failure to follow these instructions increas-
es the risk of an accident.
The charging voltage has fallen below 10 volts.
The ESP® has switched off.
The BAS may be switched off, too. The battery
may not be charged. The battery or the gener-
ator may be malfunctioning.
The ABS might not be operational.
The brake system is still functioning normally
but without the systems specified above.
Continue driving with added caution.
When the voltage is above this value
again, the ESP
® is operational again.
Have the system checked at an autho-
rized Mercedes-Benz Center as soon as
possible.
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337 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
Front-pass.
airbag
enabled
See
Operator’s
ManualFront passenger front air bag is
activated while driving even though
a child, small individual, or object
below the system’s weight
threshold is on the front passenger
seat, or the front passenger seat is
empty. Objects on the seat or
forces acting on the seat may
make the system sense supple-
mental weight.Stop the vehicle in a safe location as soon as possible and check the front
passenger seat for the following:
Switch off the ignition (page 32).
Remove child and child restraint from front passenger seat and proper-
ly secure the child in rear seat employing the child restraint if neces-
sary.
Make sure that no objects applying supplemental weight onto the seat
are present. The system may recognize such supplemental weight and
sense that an occupant on the front passenger seat is of a greater
weight than actually present.
Keep the seat unoccupied, close the front passenger door and switch
on the ignition (
page 32).
(Continued on next page)
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338 Practical hints
What to do if …
Display messagePossible cause/
consequencePossible solution
Monitor the 56indicator lamp on the center console (page 27) and the mul-
tifunction display in the instrument cluster (
page 24) for the following:
With the seat unoccupied and the ignition turned on,
the 56indicator lamp on the center console should illuminate and remain
illuminated, indicating that the OCS (
page 64) has deactivated the air bag.
the message Front-pass. airbag enabled See Operator’s Manual or the mes-
sage
Front-pass. airbag disabled See Operator’s Manual should not appear
in the multifunction display at any time the seat is unoccupied. Wait at last 60 sec-
onds for the system to complete the necessary check cycles and to make sure nei-
ther message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again. Depend-
ing on the front passenger classification sensed by the OCS (
page 64), the
56indicator lamp will remain illuminated or go out.
If above conditions are not met, the system is not working properly. Have the system
checked as soon as possible by an authorized Mercedes-Benz Center.
Warning!G
If the 56indicator lamp remains
out even after performing the above correc-
tive steps, do not have any children 12 years
old and under and other small individuals use the front passenger seat until the sys-
tem has been repaired.
Page 340 of 441
339 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
Front-pass.
airbag
disabled
See
Operator’s
ManualFront passenger front air bag is deac-
tivated while driving even though an
adult or someone larger than a small
individual is occupying the front pas-
senger seat. Forces acting on the
seat may make the system sense a
decrease in weight.Stop the vehicle in a safe location as soon as possible and check the
front passenger seat for the following:
Switch off the ignition (page 32).
Have the front passenger vacate the seat and exit the vehicle.
Keep the seat unoccupied, close the front passenger door and
switch on the ignition (
page 32).
(Continued on next page)
Page 341 of 441

340 Practical hints
What to do if …
Display messagePossible cause/
consequencePossible solution
Monitor the 56indicator lamp on the center console (page 27) and the mul-
tifunction display in the instrument cluster (
page 24) for the following:
With the seat unoccupied and the ignition turned on,
the 56indicator lamp on the center console should illuminate and remain
illuminated, indicating that the OCS (
page 64) has deactivated the air bag.
the message Front-pass. airbag enabled See Operator’s Manual or the mes-
sage
Front-pass. airbag disabled See Operator’s Manual should not appear
in the multifunction display at any time the seat is unoccupied. Wait at last 60 sec-
onds for the system to complete the necessary check cycles and to make sure
neither message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again. Depend-
ing on the front passenger classification sensed by the OCS (
page 64), the
56indicator lamp will remain illuminated or go out.
If above conditions are not met, the system is not working properly. Have the system
checked as soon as possible by an authorized Mercedes-Benz Center.
Warning!G
If the 56indicator lamp remains
illuminated with an adult occupant on the
front passenger seat even after performing
the above corrective steps, do not have anypassenger use the front passenger seat until
the system has been repaired.
Page 342 of 441

341 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
Run Flat Indicator
inoperative
The Run Flat Indicator* is malfunc-
tioning or has been switched off due
to an error.Have the Run Flat Indicator* checked by an
authorized Mercedes-Benz Center.
Check tires
Then restart
Run Flat Indicator
There was a warning message about
a loss in tire inflation pressure and
the Run Flat Indicator* has not been
reactivated yet.Make sure that the correct tire inflation pressure
is set for each tire.
Then reactivate the Run Flat Indicator*.
Tire pressure
Check tires
The Run Flat Indicator* indicates
that the pressure is too low in one or
more tires.Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers. Observe
the traffic situation around you.
Check and adjust the tire inflation pressure as
required (
page 290).
If necessary, change the wheel (page 377).
Reactivate the Run Flat Indicator* after adjusting
the tire inflation pressure values (
page 293).
Warning!G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.