2007 MERCEDES-BENZ S550 smart key

593 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Close doors
to lock them
You wanted to lock the vehicle but not all
doors were closed.

Close doors and lock vehicle again.
Do not
forget key
This display appears (for a maximum of
60 seconds) if the driver’s door is opened
with the engine shut off and no SmartKey in
the starter switch.
This message is only a reminder.

Insert SmartKey in the starter switch.
or

Take the SmartKey with KEYLESS-GO* with
you when leaving the vehicle.
Please
remove key
You have forgotten to remove the
SmartKey.

Remove the SmartKey from the starter
switch.
Change
key batteries
The batteries in the SmartKey with
KEYLESS-GO* are discharged.

Replace the batteries (
page 619).
Key
still in vehicle
A SmartKey with KEYLESS-GO* left in the
vehicle was recognized while locking the ve-
hicle from the outside.

Take the SmartKey with KEYLESS-GO* out of
the vehicle.

594 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Key
not recognized
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 316).
Key being
initialized…
Please wait
The SmartKey with KEYLESS-GO* is being
initialized in the vehicle.

Wait until the message disappears from the
multifunction display.
Remove starting
button, then
insert key
The KEYLESS-GO* system is malfunction-
ing.

Remove KEYLESS-GO* button from over
starter switch (
page 316).

Operate the vehicle with the SmartKey in the
starter switch.
Replace key
The SmartKey with KEYLESS-GO* must be
replaced.

Visit an authorized Mercedes-Benz Center as
soon as possible.

598 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Please
switch off lights
You are getting out of the vehicle and the
lights are still switched on.

Turn the exterior lamp switch to M
(page 342).
Switch off lights
or
remove key
The light switch is set to * and you have
forgotten to take out the SmartKey. The
parking lamps remain switched on.

Turn the exterior lamp switch to M
(page 342).

Remove the SmartKey from the starter
switch.
Front foglamp,
Left
The left front fog lamp is malfunctioning.

Visit an authorized Mercedes-Benz Center as
soon as possible.
Front foglamp,
Right
The right front fog lamp is malfunctioning.

Visit an authorized Mercedes-Benz Center as
soon as possible.
Rear foglamp,
Left
The left rear fog lamp is malfunctioning.

Visit an authorized Mercedes-Benz Center as
soon as possible.
Rear foglamp,
Left
Substitute bulb on
The left rear fog lamp is malfunctioning. A
substitute bulb is being used.

Visit an authorized Mercedes-Benz Center as
soon as possible.
Rear foglamp,
Right
The right rear fog lamp is malfunctioning.

Visit an authorized Mercedes-Benz Center as
soon as possible.
Rear foglamp,
Right
Substitute bulb on
The right rear fog lamp is malfunctioning. A
substitute bulb is being used.

Visit an authorized Mercedes-Benz Center as
soon as possible.

614 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
2Mechanical key

Insert mechanical key2 into the driv-
er’s door lock until it stops.

Turn mechanical key2 counterclock-
wise to position1.
The driver’s door is unlocked.

Pull door handle quickly.
The locking knob moves up.

Turn back mechanical key2 and re-
move.

Pull door handle again.
i
Unlocking the driver’s door and/or the trunk
with the mechanical key will trigger the anti-theft
alarm system (
page 75).
To cancel the alarm, insert the SmartKey or
SmartKey with KEYLESS-GO* in the starter
switch.

615 Practical hints
Unlocking/locking in an emergency
Unlocking the trunk
A minimum height clearance of 5.9 ft.
(1.80 m) is required to open the trunk lid.
1Trunk lid lock
Insert the mechanical key into the
trunk lid lock1 until it stops.

Turn mechanical key all the way to the
left.
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 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 314).
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.

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.
!
The trunk lid swings open upwards automat-
ically. Always make sure that there is sufficient
overhead clearance.
!
To prevent inadvertent lockout, make sure
to have the SmartKey or SmartKey with KEY-
LESS-GO* with you before proceeding with the
next step. The next step will lock the vehicle.

619 Practical hints
Replacing SmartKey batteries
Replacing SmartKey batteries
If the batteries in the SmartKey or the
SmartKey with KEYLESS-GO* are dis-
charged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized 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.SmartKey/SmartKey with
KEYLESS-GO*
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key out of the
SmartKey or the SmartKey with
KEYLESS-GO* (
page 614).
1Mechanical key
2Battery compartment

Insert mechanical key 1 into opening.

Press mechanical key 1 in direction of
arrow.
The battery compartment is unlatched.
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.
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.


620 Practical hintsReplacing SmartKey batteries
Pull battery compartment 2 out of the
housing.
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
(page 619) 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/
KEYLESS-GO*.


627 Practical hints
Replacing wiper blades
Replacing wiper blades
Placing wiper arms in vertical positionWiper blades in vertical positionVehicles with SmartKey
Turn SmartKey in starter switch
position1.

Turn combination switch to wiper
settingu (
page 351).

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. Change the wiper
blades twice a year, preferably in the spring
and fall. Otherwise the windows 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.
Make certain that the wiper blades are properly
installed. Improperly installed wiper blades may
cause windshield damage.
For your convenience, we recommend that you
have this work carried out by an authorized
Mercedes-Benz Center.