2007 MERCEDES-BENZ CLK550 COUPE door lock

386 Practical hints
What to do if …?
Display symbolDisplay messagePossible cause/consequencePossible solution
I Keyless Go
Check systemThe KEYLESS-GO* system is malfunction-
ing.Contact an authorized Mercedes-Benz
Center as soon as possible.
Key detected
in vehicleA SmartKey with KEYLESS-GO* left in the
vehicle was recognized while locking the
vehicle from the outside.Take the SmartKey out of the vehicle.
Please do not
forget keyThis 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.
Message is only a reminder.Insert SmartKey in the starter switch.
Take the SmartKey with
KEYLESS-GO* with you when leaving
the vehicle.
. Active headlamps
inoperativeThe Bi-Xenon cornering lamps system is
malfunctioning.Contact an authorized Mercedes-Benz
Center as soon as possible.
Active headlamps
Auxiliary bulb onThe active headlamps are malfunctioning.
Another light is being used.Contact an authorized Mercedes-Benz
Center as soon as possible.
AUTO-Light
inoperativeThe light sensor is malfunctioning. The
headlamps switch on automatically.In the control system, set lamp opera-
tion to manual mode (
page 158).
Switch on headlamps using the exteri-
or lamp switch.
Contact an authorized Mercedes-Benz
Center as soon as possible.

399 Practical hints
Unlocking/locking in an emergency
Unlocking/locking in an emergency
Unlocking 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
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
driver’s door lock until it stops.
Turn the mechanical key counterclock-
wise to position1 until the locking
knob moves up.
The driver’s door is unlocked.
Pull the door handle to open the
driver’s door.
iUnlocking and opening the driver’s door
and/or the trunk with the mechanical key will
trigger the anti-theft alarm system.
To cancel the alarm, do one of the following:

Press button Œ or ‹on the Smart-
Key.

Insert the SmartKey in the starter switch.
Vehicles with KEYLESS-GO*

Pull the outside door handle.

Press the KEYLESS-GO* start/stop button
(
page 37).

400 Practical hints
Unlocking/locking in an emergency
Unlocking the trunk
A minimum height clearance of 5.71 ft
(1.74 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 in an emergency
2HandleInsert the mechanical key into the
trunk lid lock until it stops.
Turn the mechanical key
counterclockwise to position1 and
hold it in this position.
Pull the trunk lid handle2 and lift the
trunk lid.
The trunk opens.
Turn the mechanical key back and
remove it from the trunk lid lock.
Locking the vehicle
If you cannot lock the vehicle with the
SmartKey or SmartKey with
KEYLESS-GO*, do the following:
Close the passenger door and the
trunk.
Press the central locking switch in the
center console (
page 118).
Check to see whether the locking knob
on the passenger door has moved
down.
If necessary, push it down manually.
Remove the mechanical key out of the
SmartKey (
page 399).
Check whether the trunk is locked.
If necessary, lock the trunk with the
mechanical key (
page 117).
Except for the driver’s door, the vehicle
should now be locked.
!The trunk lid swings open upwards
automatically. Always make sure there is suffi-
cient overhead clearance.

401 Practical hints
Unlocking/locking in an emergency
1Locking
Insert the mechanical key into the
driver’s door lock until it stops.
Turn the mechanical key clockwise to
position1.
The driver’s door is locked.Manually unlocking the gear selector
lever
In case of power failure, the gear selector
lever can be manually unlocked, e.g. to tow
the vehicle.
1Tab
2tool (e.g. flat blade screwdriver)
Pull the tab1 of the covering back in
direction of the center armrest com-
partment.
Insert a tool2 (e.g. flat blade screw-
driver) into the opening.
Perform the following two steps simul-
taneously:
Push tool2 down- and forward in
the direction of the arrow.
Move gear selector lever from
positionP.
Remove the tool2 from the opening.
Push the tab1 of the covering back.
iThis procedure does not arm the anti-theft
alarm system, nor does it lock the fuel filler flap.
iThe gear selector lever is locked again when
moving it to positionP.

422 Practical hints
Battery
2Negative terminal
3Positive terminal cover
Disconnecting the batteryApply the parking brake (page 59).
Make sure gear selector lever is set to
positionP (
page 170).
Turn off all electrical consumers.
Remove SmartKey from starter switch.
Vehicles with KEYLESS-GO*:
Press the start / stop button until
the engine shuts off.
Open the driver’s door.
Open the hood (page 306).
Remove the filter box (page 421).
Read and observe safety instructions
and precautions (
page 421).
Disconnect the battery negative lead
from negative terminal2.
Remove cover3 from the positive ter-
minal.
Disconnect the battery positive lead.
Warning!G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.Warning!G
With a disconnected battery

you will no longer be able to turn the
SmartKey in the starter switch and
pressing the KEYLESS-GO* start/stop
button on the gear selector lever will
have no effect

the gear selector lever will remain
locked in positionP
!Always disconnect the battery in the order
described below. Otherwise the vehicle’s elec-
tronics can be damaged.

424 Practical hints
Battery
Reconnecting the battery
Turn off all electrical consumers.
Remove SmartKey from starter switch.
Vehicles with KEYLESS-GO*:
Open the driver’s door.
Connect the battery positive lead and
fasten its cover3 (
page 422).
Connect the battery negative lead 2
(
page 422).
Reinstall the filter box (page 421).Batteries contain materials that can harm
the environment if disposed of improperly.
Large 12-volt storage batteries contain
lead. Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
!Always connect the battery in the order de-
scribed below. Otherwise the vehicle’s electron-
ics can be damaged.
!Never invert the terminal connections!
iThe following procedures must be carried
out following any interruption of battery power
(e.g. due to reconnecting):

Set the clock (page 156). Vehicles with
COMAND*: see COMAND operator’s manu-
al.

Synchronize the side windows
(
page 247).

Synchronize the tilt/sliding sunroof*
(
page 252).

428 Practical hints
Towing the vehicle
Warning!G
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the ve-
hicle. Adapt your driving accordingly.
iTo signal turns while being towed with the
hazard warning flasher in use, switch on the igni-
tion and activate the combination switch for the
left or right turn signal in the usual manner – only
the selected turn signal will operate.
Upon canceling the turn signal, the hazard warn-
ing flasher will operate again.
!When towing the vehicle with all wheels on
the ground, please note the following:
With the automatic central locking activated and
the SmartKey in starter switch position2, or
KEYLESS-GO* start/stop button in position2,
the vehicle doors lock if the left front wheel as
well as the right rear wheel are turning at vehicle
speeds of approx. 9 mph (15 km / h) or more.
To prevent the vehicle door locks from locking,
deactivate the automatic central locking
(
page 162).
Towing of the vehicle should only be done using
the properly installed towing eye bolt. Never at-
tach tow cable, tow rope or tow rod to the vehi-
cle chassis, frame or suspension parts.
iIf the battery is disconnected or discharged

the SmartKey will not turn in the starter
switch. For more information, see “Battery”
(
page 421) and “Jump starting”
(
page 425).

the gear selector lever will remain locked in
positionP. For information on manually un-
locking the transmission gear selector lever,
see (
page 401).

461 Index
Text messages 370–376
Vehicle status message memory 149
Vehicle status messages see
Multifunction display messages
Distance to empty (Range),
Trip computer 164
Door
Entry lamps 137
Handle (inside) 32
Locking/unlocking,
KEYLESS-GO* 35, 104
Locking/unlocking,
SmartKey 34, 100
Opening from inside/outside 108
Remote door unlock (Tele Aid) 284
Unlocking, Mechanical key 399
Door control panel 32
Door handle 108
DOT 337
Drinking and driving 293Driving
Abroad 300
Hydroplaning 297
In winter 299
Instructions 47, 293
Problems 58
Safety systems 88
Systems 253
Through standing water 300
Driving off 295
Driving safety systems
ABS 88
BAS 90
Electronic traction system 92
ESP
®91
Driving systems
Cruise control 253
Parktronic system*
(Canada only) 257
Driving tips 172
Accelerator position 172
Kickdown 172E
Easy-entry/exit feature 44, 162
Electrical fuses see Fuses
Electrical outlet 275
Electrical system, Technical data 446
Electronic Stability Program see ESP
®
Emergency call system* 279
Emergency calls
911 calls 243
Tele Aid calls 280, 281
Emergency operation
(Limp-Home Mode) 178
Emergency operations
Active head restraints, Resetting 403
Center console,
Indicator lamps 366–367
Gear selector lever, Unlocking 401
Instrument cluster,
Indicator lamps 356–365
Power tilt/sliding sunroof*,
Manual operation 402
Remote door unlock 284
Trunk lid, Releasing from inside 116
Trunk lid, Unlocking 400
Unlocking/locking
the vehicle 399, 400