2008 MERCEDES-BENZ CL-Class key

680 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 417).
or

Close the driver’s door.
You are driving with the trunk open.

Close the trunk (
page 501).
Check
Washer Fluid
The water level has dropped to approx.
1.1 US qts (1.0 l).

Add washer fluid (
page 560).
Lock Seat Backrest
Front Left
The driver seat backrest is not engaged.
The driver’s seat belt can not secure the
driver.

Fold back and push the seat backrest until
the seat cushion and seat backrest audibly
engage into the driving position.
Lock Seat Backrest
Front Right
The passenger seat backrest is not en-
gaged.
The front passenger’s seat belt can not se-
cure the passenger.

Fold back and push the seat backrest until
the seat cushion and seat backrest audibly
engage into the driving position.

684 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 position1 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 79).
To cancel the alarm, insert the SmartKey or
SmartKey with KEYLESS-GO* in the starter
switch.
1
Unlocking
2
Mechanical key

685 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
following:
Open the passenger door.

Close the driver’s door and the trunk.

Press down the locking knob of the
driver’s door manually.

Press down the locking knob of the
passenger door.

Exit the vehicle.

Lock the trunk with the mechanical key
(page 505).

Close the passenger 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.

686 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 684).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
Air bags contain Perchlorate material, which
may require special handling and regard for
the environment. Check with your local gov-
ernment’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.

687 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*.

694 Practical hintsReplacing 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 400).

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.

695 Practical hints
Replacing wiper blades
Vehicles with KEYLESS-GO*
Make sure the vehicle’s on-board elec-
tronics have status 1 (
page 366).

Turn combination switch to wiper
settingu (
page 400).

Press KEYLESS-GO start/stop button
repeatedly until windshield wipers
start.

Press KEYLESS-GO start/stop button
when the wiper arms are in a vertical
position.
Removing wiper blades
Fold the wiper arm forward until it
snaps into place.

Turn the wiper blade at a right angle to
wiper arm (arrow 1).

Slide the wiper blade sideways out of
the retainer in the direction of
arrow2.
Installing wiper blades
Slide the wiper blade onto wiper arm
until it locks in place.

Rotate the wiper blade into position
parallel to wiper arm.

Fold the wiper arm backward to rest on
the windshield. Make sure you hold
onto the wiper when folding the wiper
arm back.
!
Do not pull on the wiper blade inserts. They
could tear.
!
Make certain that the wiper blades are prop-
erly installed. Improperly installed wiper blades
may cause windshield damage.

696 Practical hintsFlat tirePreparing the vehicle
Park the vehicle in a safe distance from
moving traffic on a hard, flat surface
when possible.

Turn on the hazard warning flasher
(page 397).

Turn the steering wheel so that the
front wheels are in a straight ahead
position.

Shift the automatic transmission to
park positionP.

Engage the electronic parking brake.

Turn off the engine.

Have any passenger exit the vehicle at
a safe distance from the roadway.

Vehicles with SmartKey: Remove the
SmartKey from the starter switch.
Vehicles with KEYLESS-GO*: Open the
driver’s door (this puts the starter
switch in position0, same as with the
SmartKey removed from the starter
switch). The driver’s door then can be
closed again.
Remove the KEYLESS-GO*
start/stop button from the starter
switch.
Mounting the spare wheel
i
Open the door only when conditions are safe
to do so.
Warning!
G
The dimensions of the spare wheel are dif-
ferent from those of the road wheels. As a
result, the vehicle handling characteristics
change when driving with a spare wheel
mounted. Adapt your driving style accord-
ingly.
The spare wheel is for temporary use only.
When driving with spare wheel mounted,
ensure proper tire inflation pressure and
do not exceed a vehicle speed
of 50 mph (80 km/h).
Contact the nearest Mercedes-Benz Center
as soon as possible to have the spare wheel
replaced with a regular road wheel.
Never operate the vehicle with more than
one spare wheel mounted.
Do not switch off the ESP
® when a spare
wheel is mounted.