Page 375 of 514

374 Practical hintsWhat to do if …?Lamps in instrument clusterGeneral information:
If any of the following bulbs in the instru-
ment cluster fails to come on during thebulb self-check when switching on the igni-
tion, have the respective bulb checked and
replaced if necessary.Problem
Possible cause/consequence
Suggested solution
-
The yellow ABS indicator lamp
comes on while driving.
The ABS has detected a malfunction and has
switched off. The BAS and the ESP
® are also
switched off (see messages in display).
The brake system is still functioning normally
but without the ABS available.
If the ABS control unit is malfunctioning,
other systems such as the navigation
system* or the automatic transmission may
also be malfunctioning.
Continue driving with added caution.
Wheels will lock during hard braking,
reducing steering capability.
Read and observe messages in the
multifunction display (
page 383).
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.
The charging voltage has fallen below
10 volts and the ABS has switched off.
The battery might not be charged sufficiently.
Switch off electrical consumers that
are currently not needed, e.g. seat
heating*.
If necessary, have the generator (al-
ternator) and battery checked.
When the voltage is above this value
again, the ABS is operational again.
Page 384 of 514

383 Practical hints
What to do if …?
Vehicle status messages in the multifunction display
Warning and malfunction messages
appear in the multifunction display located
in the instrument cluster.
Certain warning and malfunction messag-
es are accompanied by an audible signal.
Address these messages accordingly and
follow the additional instructions given in
this Operator’s Manual.
Selecting the vehicle status message
memory menu in the control system
(page 146) displays both cleared and
uncleared messages.
High-priority messages appear in the
multifunction display in red color.Certain messages of high priority cannot
be cleared from the multifunction display
using the reset button (
page 136) or
button k,j, è, orÿ on the
steering wheel.
Other messages of high priority and
messages of less immediate priority can
be cleared from the multifunction display
using the reset button (page 136) or
button k,j, è, orÿ on the
steering wheel. They are then stored in the
vehicle status message memory
(
page 146). Remember that clearing a
message will only make the message dis-
appear. Clearing a message will not
correct the condition that caused the
message to appear.
Warning!
G
All categories of messages contain
important information which should be
taken note of and, where a malfunction is
indicated, addressed as soon as possible at
an authorized Mercedes-Benz Center.
Failure to repair condition noted may cause
damage not covered by the Mercedes-Benz
Limited Warranty, or result in property
damage or personal injury.Warning!
G
No messages will be displayed if either the
instrument cluster or the multifunction
display is inoperative.
Contact your nearest authorized
Mercedes-Benz Center.
Page 385 of 514
384 Practical hintsWhat 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 display.
For your convenience the messages are
divided into two sections:
Text messages (
page 385)
Symbol messages (
page 395)
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
display to come on. Make sure the
lamps and the multifunction display are
in working order before starting your
journey.
Page 391 of 514

390 Practical hintsWhat to do if …?Display message
Possible cause/
consequence
Possible solution
Front passenger
air bag
activated
see Oper.’s Man.
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 78) has deactivated the air bag.
the message
Front passenger air bag activated see Oper.’s Man.
or the mes-
sage
Front passenger air bag deactivated see Oper.’s Man.
should not ap-
pear in the multifunction display at any time the seat is unoccupied. Wait at last
60 seconds 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 78), 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 393 of 514

392 Practical hintsWhat to do if …?Display message
Possible cause/
consequence
Possible solution
Front passenger
air bag
deactivated
see Oper.’s Man.
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 78) has deactivated the air bag.
the message
Front passenger air bag activated see Oper.’s Man.
or the
message
Front passenger air bag deactivated see Oper.’s Man.
should not
appear in the multifunction display at any time the seat is unoccupied. Wait at last
60 seconds 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 78), 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 any
passenger use the front passenger seat until
the system has been repaired.
Page 401 of 514

400 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause/consequence
Possible solution
4
Check gas cap
See Oper.’s Man.
A loss of pressure has been detected in
the fuel system. The fuel cap may not be
closed properly or the fuel system may be
leaky.
Check the fuel cap (
page 318).
If it is not closed properly:
Close the fuel cap.
If it is closed properly:
Have the fuel system checked by an
authorized Mercedes-Benz Center.
G
Display malfunction
Visit workshop
The instrument cluster display is malfunc-
tioning.
Continue driving with added caution.
Visit an authorized Mercedes-Benz
Center as soon as possible.
The displays for several systems have
malfunctioned. Some systems them-
selves may also have malfunctioned.
Have the electronic systems checked
by an authorized Mercedes-Benz Cen-
ter.
±
Display defective
Visit workshop
Certain electronic systems are unable to
relay information to the control system.
The following systems may have failed:
Coolant temperature display
Tachometer
Cruise control display
Have the electronic systems checked
by an authorized Mercedes-Benz Cen-
ter.
J
Doors open
You are attempting to drive with one or
more doors open.
Close the doors.
Page 490 of 514

489 Technical terms
Head-thorax air bag
Installed in the driver and the front pas-
senger seat, these air bags protect oc-
cupants during side impact collisions
exceeding a preset threshold. Unlike
normal side impact air bags,
head-thorax air bags are also designed
to provide protection for the head area.
Instrument cluster
The displays and indicator/warning
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer,
coolant temperature indicator and fuel
display.
KEYLESS-GO*
System for entering and operating the
vehicle without the use of a SmartKey.
Kickdown
Depressing the accelerator past the
point of resistance shifts the transmis-
sion down to the lowest possible gear.
This very quickly accelerates the vehi-
cle and should not be used for normal
acceleration needs.Kilopascal (kPa)
(
page 356)
Locking knob
Knob on the door which indicates
whether the door is locked or un-
locked. Pushing the locking knob down
on the driver’s or passenger door from
inside will lock that door.
Maintenance System (U.S. vehicles)
Maintenance service indicator in the
multifunction display that informs the
driver when the next vehicle mainte-
nance service is due. The Maintenance
System in your vehicle tracks distance
driven and the time elapsed since your
last maintenance service, and calls for
the next maintenance service
accordingly.
Maximum load rating
(page 356)
Maximum loaded vehicle weight
(page 356)Maximum tire inflation pressure
(
page 356)
Memory function*
Used to store three individual seat,
steering wheel and exterior mirror
positions.
Menu
The control system displays are ar-
ranged in menus. Each menu contains
a number of commands for particular
systems.
MON
(Motor O
ctane N
umber)
The Motor Octane Number for gasoline
as determined by a standardized meth-
od. It is an indication of a gasoline's
ability to resist undesired detonation
(knocking). The average of both the
MON (Motor Octane Number) and
->RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.
Page 497 of 514

496 IndexControl system submenus 141, 143, 150
Convenience 160
Instrument cluster 151
Lighting 156
Time/Date 153
Vehicle 159
Controller Area Network see CAN system
Coolant 327, 484
Adding 327
Anticorrosion/antifreeze
mixing ratio and quantity 484
Capacities 479
Checking coolant level 327
Messages in display 397–399
Temperature 317
Temperature indicator 137
Warning lamp 377
Coolants 484
Corner-illuminating front fog lamps* 132
Replacing bulbs 438, 439
Cruise control 265, 488
Canceling 267
Cruise control lever 265
Current speed 266
Fine adjustment 268
Higher speed 268Last stored speed
(“Resume” function) 268
Slower speed 268
Cup holder 283
Curb weight 355
Customer Assistance Center see CAC
D
Date 153
Date, Setting 154, 155
Daytime running lamp mode 129
Setting 156
Deep water see Standing water
Defogging
Windshield 192, 202
Defrosting, Front 191, 201
Defrosting, Rear 185
Delayed shut-off
Exterior lamps 158
Interior lighting 159
Department of Transportation see DOT
Difficulties
With starting 50
Digital speedometer 144
Dimensions, Vehicle 478
Direction of rotation (tires) 333Displays
Digital speedometer 144
Maintenance service indicator 361
Messages in display 383
Multifunction display 140
Outside temperature 138
Symbol messages 395–412
Text messages 385–393
Vehicle status message memory 147
Vehicle status messages see
Multifunction display messages
Distance to empty (Range),
Trip computer 161
Door
Control panel 30
Entry lamps 135
Handle 30, 107
Locking/unlocking,
KEYLESS-GO* 33, 60, 103
Locking/unlocking,
SmartKey 32, 60, 98
Messages in display 400
Opening from inside/outside 107
Remote door unlock (Tele Aid) 295
Unlocking, Mechanical key 419
DOT 355