Page 687 of 801
686 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Key Not
Detected
The SmartKey with KEYLESS-GO* is mo-
mentarily not recognized.
Change the position of the SmartKey in the
vehicle.
If necessary, operate vehicle using SmartKey
with KEYLESS-GO* in starter switch under
KEYLESS-GO* button (
page 371).
Key Being
Initialized…
Please Wait
The SmartKey with KEYLESS-GO* is be-
ing initialized in the vehicle.
Wait until the message disappears from the
multifunction display.
Remove "START" Button
and Insert Key
The KEYLESS-GO* system is malfunc-
tioning.
Remove KEYLESS-GO* button from the
starter switch (
page 371).
Operate the vehicle with the SmartKey in the
starter switch.
Obtain
a New Key
The SmartKey with KEYLESS-GO* must
be replaced.
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Key Does Not
Belong to Vehicle
The SmartKey in the starter switch does
not belong to your vehicle.
Remove the SmartKey from the starter
switch.
Page 691 of 801
690 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Turn Lights Off
or
Remove Key
The exterior lamp switch is set to * and
you have forgotten to take out the
SmartKey. The parking lamps remain
switched on.
Switch off the headlamps (
page 399).
or
Remove the SmartKey from the starter
switch.
Check
Left Fog Lamp
The left front fog lamp is malfunctioning.
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Right Fog Lamp
The right front fog lamp is malfunctioning.
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Rear Left
Fog Lamp
The left rear fog lamp is malfunctioning.
A substitute bulb is being used.
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Front Left
Parking Lamp
The left front parking lamp is malfunction-
ing. A substitute bulb is being used.
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Front Right
Parking Lamp
The right front parking lamp is malfunction-
ing. A substitute bulb is being used.
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Left Reverse Lamp
The left backup lamp is malfunctioning.
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Check
Right Reverse Lamp
The right backup lamp is malfunctioning.
Contact an authorized Mercedes-Benz Cen-
ter as soon as possible.
Page 705 of 801
704 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Shift to P
You have attempted to turn off the engine
with the KEYLESS-GO* start/stop button
and opened the driver’s door with the auto-
matic transmission not shift to park
positionP.
Shift the automatic transmission to park
positionP (
page 426).
or
Close the driver’s door.
You are driving with the trunk open.
Close the trunk (
page 512).
Check
Washer Fluid
The water level has dropped to approx.
1.1 US qts (1.0 l).
Add washer fluid (
page 580).
Page 709 of 801
708 Practical hintsUnlocking/locking in an emergencyUnlocking the vehicle
If you cannot unlock the vehicle with the
SmartKey or KEYLESS-GO*, unlock 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
Insert mechanical key2 into the driv-
er’s door lock until it stops.
Turn mechanical key2 counterclock-
wise to position 1 and hold it there.
Pull the door handle until the locking
knob moves up.
The driver’s door is unlocked.
Pull the door handle once more to open
the driver’s door.
i
Unlocking the vehicle with the mechanical
key and opening the driver’s door or the trunk
with the mechanical key will trigger the anti-theft
alarm system (
page 82).
To cancel the alarm, insert the SmartKey or
SmartKey with KEYLESS-GO* in the starter
switch.
1
Unlocking
2
Mechanical key
Page 710 of 801
709 Practical hints
Unlocking/locking in an emergency
Unlocking the trunk
A minimum height clearance of 6.0 ft
(1.8 m) is required to open the trunk lid.
Insert the mechanical key2 into the
trunk lid lock until it stops.
Turn mechanical key2 all the way
counterclockwise to position 1.
The trunk opens.
Turn the mechanical key2 back and
remove it from the trunk lid lock.
Locking the vehicle
If you cannot lock the vehicle with the
SmartKey or KEYLESS-GO*, do the follow-
ing:
Close the front passenger door, the
rear right door and the trunk.
Open the driver’s door and the rear left
door.
Press the central locking switch on the
driver’s door (
page 369).
The locking knobs of the front passen-
ger door and the rear doors move
down.
If the vehicle battery is disconnected or
drained:
Press down the locking knobs of
the front passenger door and the
rear doors manually.
Exit the vehicle.
Check whether the trunk is locked.
If necessary, lock the trunk with the
mechanical key (
page 517).
Close the driver’s door.
Enter the vehicle through the rear left
door.
Press down the locking knob of the
driver’s door.
Exit the vehicle.
Close the rear left door.
The vehicle is locked.
1
Unlocking in an emergency
2
Mechanical key
!
The trunk lid swings open upwards automat-
ically. Always make sure that there is sufficient
overhead clearance.
i
If you cannot close the trunk with the re-
mote trunk opening/closing* switch, lower the
trunk lid manually and close it with hands placed
flat on the trunk lid until it is engaged in its lock.
!
To prevent inadvertent lockout, make sure
to have the SmartKey or SmartKey with
KEYLESS-GO* with you before proceeding with
the next step. The next step will lock the vehicle.
i
This procedure does not arm the anti-theft
alarm system nor does it lock the fuel filler flap.
Page 713 of 801
712 Practical hintsReplacing SmartKey batteriesIf the batteries in the SmartKey/SmartKey
with KEYLESS-GO* are discharged, the ve-
hicle can no longer be locked or unlocked.
It is recommended to have the batteries re-
placed at an authorized Mercedes-Benz
Center.Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key out of the
SmartKey/SmartKey with
KEYLESS-GO* (
page 708).1Mechanical key
2Battery compartment
Insert mechanical key 1 into opening.
Press mechanical key 1 in direction of
arrow.
The battery compartment is unlatched.
Pull battery compartment 2 out of the
housing.
Warning!
G
Batteries contain poisonous and corrosive
substances. Therefore keep the batteries
out of reach of children.
If a battery is swallowed, seek medical help
immediately.Warning!
G
SmartKey batteries contain Perchlorate ma-
terial, which may require special handling
and regard for the environment. Check with
your local government’s disposal guidelines.
California residents, see
http://www.dtsc.ca.gov/HazardousWaste
/Perchlorate/index.cfm.
i
When inserting the batteries, make sure
they are clean and free of lint.
i
When changing batteries, always replace
both batteries.
The required replacement batteries are available
at any authorized Mercedes-Benz Center.
Page 714 of 801
713 Practical hints
Replacing SmartKey batteries
3Batteries
4Contact springs
Pull out batteries3.
Using a line-free cloth, insert new bat-
teries 3 under contact springs 4 with
the positive terminal (+) side facing up.
Return battery compartment 2 into
housing until it locks into place.
Slide the mechanical key back into the
SmartKey/SmartKey with
KEYLESS-GO*.
Check the operation of the SmartKey/
SmartKey with KEYLESS-GO*.
Page 722 of 801
721 Practical hints
Replacing wiper blades
Replacing wiper blades
Placing wiper arms in vertical positionWiper blades in vertical position
Make sure the hood is fully closed.
Vehicles with SmartKey
Turn SmartKey in starter switch
position1.
Turn combination switch to wiper
settingu (
page 408).
With wiper arm in vertical position, turn
the SmartKey in starter switch to
position0.
Warning!
G
For safety reasons, switch off wipers and re-
move SmartKey from starter switch (vehi-
cles with KEYLESS-GO*: Make sure the
vehicle’s on-board electronics have
status0) before replacing a wiper blade.
Otherwise, the wiper motor could suddenly
turn on and cause injury. Warning!
G
Wiper blades are components that are sub-
ject to wear and tear. Replace the wiper
blades twice a year, preferably in the spring
and fall. Otherwise the front window will not
be properly wiped. As a result, you may not
be able to observe surrounding traffic condi-
tions and could cause an accident.
!
To avoid damage to the hood:
The wiper arms should only be folded for-
ward when in the vertical position.
Never open the hood when the wiper arm is
folded forward.
!
Hold on to the wiper when folding the wiper
arm back. If released, the force of the impact
from the tensioning spring could crack the wind-
shield.
Do not allow the wiper arms to contact the wind-
shield glass without a wiper blade inserted.
For your convenience, we recommend that you
have this work carried out by an authorized
Mercedes-Benz Center.
