391 Practical hints
What to do if …?
Display symbol
Display message
Possible cause/consequence
Possible solution
I
Key recognized
in vehicle
A SmartKey with KEYLESS-GO* left in the
vehicle was recognized while locking the
vehicle from the outside.
Take the SmartKey out of the vehicle.
Key
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.
Message is only a reminder.
Insert SmartKey in the starter switch.
Take the SmartKey with
KEYLESS-GO* with you when leaving
the vehicle.
.
Active Light System
currently
unavailable
The Bi-Xenon cornering lamps system is
malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Active Light System
malfunction
Drive to workshop
The Bi-Xenon cornering lamps system is
malfunctioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Active Light System
Substitute bulb on
The active headlamps are malfunctioning.
Another light is being used.
Visit an authorized Mercedes-Benz
Center as soon as possible.
3rd brake lamp
The high mounted brake lamp is malfunc-
tioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Brake lamp
Drive to workshop
Stop lamp illumination is delayed or lamp
is permanently on.
Visit an authorized Mercedes-Benz
Center as soon as possible.
394 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause/consequence
Possible solution
.
Reverse lamp, right
The right backup lamp is malfunctioning.
Replace the bulb as soon as possible.
Side marker lamp
front left
The front left side marker lamp is malfunc-
tioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Side marker lamp
front right
The front right side marker lamp is mal-
functioning.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Tail lamp left
back-up lamp on
The left tail lamp is malfunctioning. A
back-up bulb is being used.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Tail lamp right
back-up lamp on
The right tail lamp is malfunctioning. A
back-up bulb is being used.
Visit an authorized Mercedes-Benz
Center as soon as possible.
Turn off lamps
Lamps have been turned on although the
SmartKey in the starter switch is in posi-
tion 0.
Turn off the headlamps.
Turn signal,
front left
The left front turn signal lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
Turn signal,
front right
The right front turn signal lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
Turn signal,
left mirror
The turn signal in the left exterior rear
view mirror is malfunctioning. This mes-
sage will only appear if all light emitting di-
odes have stopped working.
Have the LEDs replaced as soon as
possible.
404 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
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.
The driver’s door is unlocked.
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
SmartKey.
Insert the SmartKey in the starter
switch.
Vehicles with KEYLESS-GO*
Pull the outside door handle.
Press the KEYLESS-GO* start/stop
button (
page 35).
420 Practical hintsFlat tire
Preparing 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 137).
Turn the steering wheel so that the
front wheels are in a straight ahead
position.
Set the parking brake (
page 57).
Move the gear selector lever toP.
Vehicles with SmartKey:
Turn off the engine (
page 58).
Remove the SmartKey from the starter
switch.Vehicles with SmartKey with
KEYLESS-GO*:
Turn off the engine by pressing the
KEYLESS-GO* start/stop button on the
gear selector lever once (
page 58).
Open the driver’s door (this puts the ig-
nition in position0 (
page 36), same
as with the SmartKey removed from
the starter switch). The driver’s door
then can be closed again.
Have any passenger exit the vehicle at
a safe distance from the roadway.
Warning!
G
The dimensions of the spare wheel is differ-
ent from those of the road wheels. As a re-
sult, 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 pressure and do not ex-
ceed a vehicle speed of 50 mph (80 km/h).
Drive to 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 Minis-
pare wheel is mounted.
iOpen door only when conditions are
safe to do so.
427 Practical hints
Battery
2Negative terminal
3Positive terminal cover
Disconnecting the battery
Depress the parking brake pedal.
Make sure gear selector lever is set to
positionP.
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 308).
Remove the filter box (
page 426).
Read and observe safety instructions
and precautions (
page 426).
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 electronics can be damaged.
433 Practical hints
Towing the vehicle
Warning!
G
Prior to towing the vehicle with all wheels on
the ground, make certain that the SmartKey
is in starter switch position
2.
If the SmartKey is left in starter switch posi-
tion
0 for an extended period of time, it can
no longer be turned in the switch. In this
case, the steering is locked. To unlock, re-
move SmartKey from starter switch and re-
insert.
If circumstances require towing the vehicle
with all wheels on the ground, always tow
with a tow bar if:
the engine will not run
there is a malfunction in the power sup-
ply or in the vehicle’s electrical system
as that will be necessary to adequately con-
trol the towed 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 ignition 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 haz-
ard warning flasher will operate again.
!When towing the vehicle with all wheels
on the ground, please note the follow-
ing:
With the automatic central locking acti-
vated and the SmartKey in starter
switch position2, or KEYLESS-GO*
start/stop button in position2, the ve-
hicle doors lock if the left front wheel
as well as the right rear wheel are turn-
ing at vehicle speeds of approx. 9 mph
(15 km / h) or more.
Switch off the tow-away alarm
(page 95).
To prevent the vehicle door locks from
locking, deactivate the automatic cen-
tral locking (
page 163).
Towing of the vehicle should only be
done using the properly installed tow-
ing eye bolt. Never attach tow cable,
tow rope or tow rod to the vehicle chas-
sis, frame or suspension parts.
434 Practical hintsTowing the vehicle
Installing towing eye bolt
Towing eye bolt CLK 350
1Cover on right side of front bumper2Cover on right side of rear bumper
To remove cover:
Press mark on cover 1 or 2.
Lift cover off to reveal the threaded
hole for towing eye bolt.
The towing eye bolt is supplied with the
tool kit (located in the compartment under-
neath the trunk floor).
Screw towing eye bolt in to its stop and
tighten with lug wrench.
To reinstall cover:
Fit cover 1 or 2 and snap into place.
iIf the battery is disconnected or
discharged
the SmartKey will not turn in the
starter switch. For more informa-
tion, see “Battery” (
page 426)
and “Jump starting” (page 430).
the gear selector lever will remain
locked in positionP. For informa-
tion on manually unlocking the
transmission gear selector lever,
see (
page 406).
476 IndexKey, SmartKey with KEYLESS-GO*
Changing batteries 411
KEYLESS-GO* 103, 463
Batteries in SmartKey 108
Battery check lamp, SmartKey 107
Factory setting 106, 108
Ignition 36
Important notes 104
Lock button 60
Locking/unlocking 33, 60, 103
Locking/unlocking,
Global setting 106
Locking/unlocking, Global
with lock button on trunk lid 109
Locking/unlocking,
Selective setting 107
Loss of key 110
Messages in display 390
Remote control 103
Start / stop button 35
Starting the engine 49
Turning off the engine 58
Unlocking/opening trunk lid 109
Kickdown 174, 463
Kilopascal 343L
Labels 442
Certification 442
Emission control information 442
Vacuum line routing diagram 442
Lamp sensor see Light sensor
Lamps, exterior 412
Light sensor 392
Messages in display 391–395
Lamps, indicator and warning
ABS 25, 360
Battery (SmartKey) 101, 107
Brakes 25, 361
Center console 368–369
CHECK ENGINE 362, 363
Coolant 364
Coolant temperature 25, 141
Distance warning 25
Engine diagnostics 362, 363
Engine malfunction 25, 362, 363
ESP
®
25, 365
Fog lamps 134
Front passenger front air bag off 68
Front passenger front
air bag off indicator lamp 368
Fuel reserve 25, 365High beam headlamp 25
Instrument cluster 360–367
Low beam headlamps 25
Parktronic system* warning
indicators (Canada only) 260
Seat belt telltale 25, 71, 366
SRS 25, 63, 367
Turn signals 25
Language, Setting 155
LATCH-type child seat anchors see
Children in the vehicle
License plate lamps
Messages in display 392
Replacing bulbs 413, 417
Light alloy wheels, cleaning 356
Light sensor
Messages in display 392
Lighter see Cigarette lighter
Lighting, Exterior and interior 131
Limp-Home Mode 179
Loading
Ski sack* (Canada only) 263
Loading see Vehicle loading
Loading the vehicle 320
Locator lighting 133, 161