Page 340 of 481
339 Practical hints
What to do if …?
Where will I find ...?
Unlocking/locking in an emergency
Opening/closing in an emergency
Replacing SmartKey batteries
Replacing bulbs
Replacing wiper blades
Flat tire
Battery
Jump starting
Towing the vehicle
Fuses
Page 358 of 481
357 Practical hints
What to do if …?
Display
Possible cause
Possible solution
MOVE SELECTOR LEVER
TO PARK
You have tried to turn off the engine with
the KEYLESS-GO* start/stop button
(page 35) with the gear selector lever not
inP.
Place the gear selector lever in positionP.
PRE-SAFE INACTIVE
SEE OPERATORS MANUAL
If BAS or ESP
® malfunction messages are
displayed simultaneously, PRE-SAFE
® has
been deactivated as a result of these mal-
functions. All other occupant safety sys-
tems, such as the air bags, are still
available.
Visit an authorized Mercedes-Benz Center as
soon as possible.
PRE-SAFE
® itself has failed. All other occu-
pant safety systems, such as the air bags,
are still available.
Visit an authorized Mercedes-Benz Center as
soon as possible.
Page 369 of 481

368 Practical hintsWhat to do if …?Display
Possible cause
Possible solution
_
ENTRY POSITION
DO NOT DRIVE
Seat, exterior mirrors and steering wheel
have not yet moved to their preset driving
positions.
Wait until the seat, exterior mirrors and
steering wheel have moved to their driv-
ing positions.
The message will disappear.
Y
HOOD OPEN
You are driving with the hood open.
Close the hood (
page 288).
I
REMOVE KEY
You have forgotten to remove the
SmartKey.
Remove the SmartKey from the starter
switch.
REPLACE KEY
DRIVE TO WORKSHOP
The SmartKey is malfunctioning.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
AUTOMATIC LIGHT ON
REMOVE KEY
SmartKey in starter switch position 1
or2.
Remove the SmartKey from the starter
switch.
KEY
CHECK BATTERY
The battery in the KEYLESS-GO* key is
discharged.
Replace the battery (
page 392).
KEY
NOT RECOGNIZED
SmartKey with KEYLESS-GO* is not rec-
ognized while the engine is running be-
cause
the SmartKey is not in the vehicle
there is strong radio-frequency inter-
ference
Stop the vehicle as soon as it is safe to do
so.
Search for the SmartKey.
Otherwise the vehicle cannot be centrally
locked nor can the engine be started again
after it has been stopped.
Page 370 of 481

369 Practical hints
What to do if …?
Display
Possible cause
Possible solution
F
KEY
NOT RECOGNIZED
The SmartKey with KEYLESS-GO* is mo-
mentarily not recognized.
Change the position of the SmartKey with
KEYLESS-GO* in the vehicle.
Operate the vehicle with the SmartKey in
the starter switch if necessary.
KEY
STILL IN VEHICLE
A SmartKey with KEYLESS-GO* left in the
vehicle was recognized while locking the
vehicle from the outside.
Take the SmartKey with KEYLESS-GO*
out of the vehicle.
KEY
DRIVE TO WORKSHOP
The KEYLESS-GO* system is malfunction-
ing.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
.
3RD BRAKE LIGHT
CHECK LIGHT
The high mounted brake lamp is malfunc-
tioning.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
STOP LIGHT
VISIT WORKSHOP
Brake lamp illumination is delayed or
lamp is permanently on.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
BRAKE LIGHT LEFT
CHECK LIGHT
SUBSTITUTE LAMP ON
The left brake lamp is malfunctioning. A
substitute bulb is being used.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
BRAKE LIGHT RIGHT
CHECK LIGHT
SUBSTITUTE LAMP ON
The right brake lamp is malfunctioning. A
substitute bulb is being used.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
DISPLAY DEFECTIVE
VISIT WORKSHOP
The display for the lamps or the system is
malfunctioning.
Visit an authorized Mercedes-Benz Cen-
ter as soon as possible.
Page 373 of 481

372 Practical hintsWhat to do if …?Display
Possible cause
Possible solution
.
STANDING LIGHT, L
CHECK LIGHT
The left front parking lamp is malfunction-
ing.
Replace the bulb as soon as possible.
STANDING LIGHT, R
CHECK LIGHT
The right front parking signal lamp is mal-
functioning.
Replace the bulb as soon as possible.
STANDING LIGHT, L
CHECK LIGHT
SUBSTITUTE LAMP ON
The left rear parking signal lamp is mal-
functioning. A substitute bulb is being
used.
Replace the bulb as soon as possible.
STANDING LIGHT, R
CHECK LIGHT
SUBSTITUTE LAMP ON
The right rear parking signal lamp is mal-
functioning. A substitute bulb is being
used.
Replace the bulb as soon as possible.
TAIL LIGHT, LEFT
CHECK LIGHT
SUBSTITUTE LAMP ON
The left tail lamp is malfunctioning. A sub-
stitute bulb is being used.
Replace the bulb as soon as possible.
TAIL LIGHT, RIGHT
CHECK LIGHT
SUBSTITUTE LAMP ON
The right tail lamp is malfunctioning. A
substitute bulb is being used.
Replace the bulb as soon as possible.
TURN OFF LIGHTS
Lamps have been turned on although the
SmartKey in the ignition is in position 0.
Turn the exterior lamp switch to M
(page 50).
Page 375 of 481

374 Practical hintsWhat to do if …?Display
Possible cause
Possible solution
<
SEAT BELT SYSTEM
DRIVE TO WORKSHOP
The seat belt system is malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
K
CLOSE
SUNROOF
You have opened the driver’s door with
the SmartKey removed from the starter
switch and the sliding portion of the
tilt/sliding sunroof open.
Close the tilt/sliding sunroof
(page 212).
J
CLOSE
SUNROOF
You have opened the driver’s door with
the SmartKey removed from the starter
switch and the tilting portion of the
tilt/sliding sunroof open.
Close the tilt/sliding sunroof
(page 212).
L
TELE AID
DRIVE TO WORKSHOP
One or more main functions of the Tele
Aid system are malfunctioning.
Have the Tele Aid system checked by an
authorized Mercedes-Benz Center.
TELE AID BATTERY
DRIVE TO WORKSHOP
The emergency power battery for the Tele
Aid system is malfunctioning. If the vehi-
cle battery is also discharged, Tele Aid
will not be operational.
Have the Tele Aid system checked by an
authorized Mercedes-Benz Center.
t
FUNCTION
UNAVAILABLE
This display appears if button t or
s on the multifunction steering wheel
is pressed and the vehicle is not equipped
with a telephone.
Page 389 of 481
388 Practical hintsUnlocking/locking in an emergencyUnlocking the vehicle
If you are unable to unlock the vehicle with
the SmartKey or KEYLESS-GO*, open the
driver’s door and the trunk using the me-
chanical key. Removing the mechanical key
1Mechanical key locking tab
2Mechanical key
Move locking tab1 in the direction of
arrow.
Slide mechanical key2 out of the
housing.Unlocking the driver’s door
1Unlocking
Insert the mechanical key into the driv-
er’s door lock until it stops.
Turn the mechanical key counterclock-
wise to position1.
The driver’s door is unlocked.
iUnlocking the driver’s door and/or the
trunk with the mechanical key will trig-
ger the anti-theft alarm system.
To cancel the alarm, insert the
SmartKey or SmartKey with
KEYLESS-GO* in the starter switch.
Page 390 of 481

389 Practical hints
Unlocking/locking in an emergency
Unlocking the trunk
A minimum height clearance of 6 ft.
(1.85 m) is required to open the trunk lid.
The trunk lid lock is located next to the
handle above the rear license plate recess.
1Unlocking and opening
Insert the mechanical key into the
trunk lid lock until it stops.
Turn the mechanical key counterclock-
wise to position1.
The trunk opens.
Turn the mechanical key back and re-
move it from the trunk lid lock.
Locking the vehicle
If you cannot lock the vehicle with the
SmartKey or the SmartKey with
KEYLESS-GO*, do the following:
Close the front passenger door, the
rear doors and the trunk lid.
Press the central locking switch in the
center console (
page 113).
Check to see whether the locking
knobs on the doors have moved down.
If necessary, push them down manual-
ly.
Except for the driver’s door, the vehicle
should now be locked.
1Locking
Remove the mechanical key out of the
SmartKey (
page 388).
Insert the mechanical key into the driv-
er’s door lock until it stops.
Turn the mechanical key clockwise to
position1.
The driver’s door is locked.
!The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.