Page 236 of 473

235 Controls in detail
Power windows
Power windows
Opening and closing the windows
The windows are opened and closed elec-
trically. The switches for both door win-
dows are located on the driver’s door. The
switch for operating the passenger-side
door window is located on the passenger
door.
The door windows can also be operated
using the retractable hardtop switch
(
page 237). The rear side windows can
only be operated using the retractable
hardtop switch (
page 237) or the
SmartKey* (
page 238).
1Left door window
2Right door window
Warning!G
When closing the windows, make sure there
is no danger of anyone being harmed by the
closing procedure.
The closing of the door windows can be
immediately halted by releasing the switch
or, if the switch was pressed past the resis-
tance point and released, by pressing the
respective switch.
The door windows are equipped with the
express-close and automatic reversal
function. If a door window encounters an
obstruction that blocks its path in a circum-
stance where you pressed the switch past
the resistance point and released it to close
the window, the automatic reversal function
will stop the window and open it slightly.
If a door window encounters an obstruction
that blocks its path in a circumstance where
you are closing the window by pressing and
holding the switch, by pressing and holding
button‹on the SmartKey, by pushing
and holding the retractable hardtop switch,
or by pressing and holding the,button
on the climate control panel or automatic
climate control* panel, the automatic rever-
sal function will not operate.
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it
with you, and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle.
A child’s unsupervised access to a vehicle
could result in an accident and/or serious
personal injury.
Page 281 of 473

280 Operation
Driving instructions
Power assistanceBrakes
To help prevent brake disc corrosion after
driving on wet road surfaces (particularly
salted roads), it is advisable to brake the
vehicle with considerable force prior to
parking. The heat generated serves to dry
the brakes.
If your brake system is normally only sub-
jected to moderate loads, you should occa-
sionally test the effectiveness of the
brakes by applying above-normal braking
pressure at higher speeds. This will also
enhance the grip of the brake pads.
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
vehicle.
Warning!G
After driving in heavy rain for some time
without applying the brakes or through wa-
ter deep enough to wet brake components
or salty road conditions, the first braking ac-
tion may be somewhat reduced and in-
creased pedal pressure may be necessary to
obtain expected braking effect. Maintain a
safe distance from vehicles in front.
Resting your foot on the brake pedal will
cause excessive and premature wear of the
brake pads.
It can also result in the brakes overheating,
thereby significantly reducing their effec-
tiveness. It may not be possible to stop the
vehicle in sufficient time to avoid an acci-
dent.
!Because the ESP® operates automatically,
the engine must be turned off (SmartKey in
starter switch position0 or1) when
the parking brake is being tested on a brake
test dynamometer
the vehicle is being towed with the front axle
raised
Active braking action through the ESP
® may
otherwise seriously damage the brake system.
Page 352 of 473

351 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
on for a maximum of 6 seconds
after starting the engine.The seat belt telltale reminds you and your
passenger to fasten your seat belts before
driving off.Fasten your seat belts.
Regardless of whether the seat belts
are fastened or not, the seat belt tell-
tale always comes on and remains lit
for 6 seconds after starting the en-
gine.
maximum of 6 seconds after
starting the engine.You have forgotten to fasten your seat belt.Fasten your seat belt.
The warning chime stops sounding.
on while the vehicle is standing
still and the engine is running or
during driving.You and/or your passenger have forgotten to
fasten your seat belts.Fasten your seat belts.
The seat belt telltale goes out.
There are items placed on the passenger seat
and therefore the system senses the passen-
ger seat as being occupied.Remove the items from the passenger
seat and put them in a safe place.
The seat belt telltale goes out.
Page 369 of 473
368 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
•Coolant
Stop, turn engine
offThe coolant is too hot.
Among other possible causes,
the poly-V-belt could be broken.Stop the vehicle in a safe location or as soon as it is
safe to do so.
Turn off the engine.
Apply the parking brake (page 59).
Check the poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise, the engine will
overheat due to an inoperative water pump which
may result in damage to the engine. Contact an
authorized Mercedes-Benz Center.
If it is intact:
Wait for the message to disappear before restarting
the engine.
Doing otherwise could result in serious engine
damage that is not covered by the Mercedes-Benz
Limited Warranty.
(Continued on next page)
Page 375 of 473

374 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
AReserve fuelThe fuel level has dropped below the
reserve mark.Refuel at the next gas station (page 291).
4Gas cap
is openA loss of pressure has been detected
in the fuel system. The fuel cap may
not be closed properly or the fuel
system may be leaky.Check the fuel cap (page 291).
If it is not closed properly:
Close the fuel cap.
If it is closed properly:
Have the fuel system checked by an autho-
rized Mercedes-Benz Center.
KRetractable roof
Open/Close completelyYou are driving with the retractable
hardtop not properly locked.Stop the vehicle in a safe location. Observe
the traffic situation around you.
Push the retractable hardtop switch forward
or rearward until the retractable hardtop is
completely closed or open (
page 240).
Retractable roof
being openedThe retractable hardtop is not com-
pletely opened or closed. The roof
hydraulics will start to lose pressure.Make sure the retractable hardtop is com-
pletely opened or closed (
page 240).
Retractable roof
locked
while vehicle is
movingYou have attempted to open the
retractable hardtop while driving.Stop the vehicle in a safe location and try to
open the hardtop again.
Page 376 of 473

375 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
OYou are driving with the hood open.Risk of accident!
Stop the vehicle in a safe location or as soon
as it is safe to do so.
Apply the parking brake (page 59).
Close the hood (page 294).
IPlease
get a new keyThe SmartKey is malfunctioning.Contact an authorized Mercedes-Benz
Center.
Remove keyYou have forgotten to remove the
SmartKey from the starter switch.Remove the SmartKey from the starter
switch.
.3rd brake lampThe high mounted brake lamp is
malfunctioning. This message will
only appear if a critical number of
LEDs have stopped working.Contact an authorized Mercedes-Benz
Center as soon as possible.
AUTO-Light
inoperativeThe light sensor is malfunctioning.
The headlamps switch on automati-
cally.Contact an authorized Mercedes-Benz
Center as soon as possible.
To switch off the headlamps (U.S. vehicles only):
In the control system, set lamp operation to
manual mode (
page 143).
Switch off headlamps using the exterior
lamp switch (
page 109).
Page 380 of 473

379 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.Rear right
marker lampThe right rear side marker lamp is
malfunctioning. This message will
only appear if a critical number of
LEDs have stopped working.Contact an authorized Mercedes-Benz
Center as soon as possible.
Tail lamp, left
Auxiliary bulb onThe left tail lamp is malfunctioning.
This message will only appear if a
critical number of LEDs have
stopped working. A backup bulb
has been brought into use.Contact an authorized Mercedes-Benz
Center as soon as possible.
Tail lamp, right
Auxiliary bulb onThe right tail lamp is malfunction-
ing. This message will only appear if
a critical number of LEDs have
stopped working. A backup bulb
has been brought into use.Contact an authorized Mercedes-Benz
Center as soon as possible.
Turn off
lightsYou have removed the SmartKey
from the starter switch, opened the
driver’s door and left the headlamps
on.Switch off the headlamps (page 61).
Turn off lights or
remove keyThe exterior lamp switch is set to
positionU, and you have forgot-
ten to remove the SmartKey from
the starter switch. The parking
lamps remain switched on.Switch off the headlamps (page 61).
or
Remove the SmartKey from the starter
switch.
Page 388 of 473
387 Practical hints
Unlocking/locking in an emergency
Unlocking/locking in an emergency
Unlocking the vehicle
If you cannot unlock the vehicle with the
SmartKey, open the driver’s door and the
trunk using the mechanical key. Removing the mechanical key
1Mechanical key locking tab
2Mechanical key
Move locking tab1 in direction of
arrow.
Slide mechanical key2 out of the
housing.Unlocking the driver’s door
Insert mechanical key 2 into the
driver’s door lock until it stops.
Turn mechanical key 2 counterclock-
wise to position1 until the locking
knobs moves up.
The driver’s door is unlocked.
Pull the door handle to open the
driver’s door.
iUnlocking the vehicle with the mechanical
key and opening the driver’s door or the trunk
will trigger the anti-theft alarm system
(
page 90).
To cancel the alarm, insert the SmartKey in the
starter switch.
1Unlocking
2Mechanical key