165 Controls in detail
Automatic climate control
The system switches automatically to the
air recirculation mode if the carbon
monoxide (CO) or nitrogen oxide (NO
X)
concentration of the outside air increases
beyond a predetermined level, for example
in a tunnel.
The automatic air recirculation mode does
not function if AC
OFF
m o d e i s s e l e c t e d o r i f
the outside temperature has fallen below
41°F (5°C).
The activated charcoal filter should be
switched off when windows fog up on the
inside, or if the passenger compartment
needs to be quickly heated or cooled
down.
Rear window defroster
The rear window defroster uses a large
amount of power. To keep battery drain to
a minimum, switch off the defroster as
soon as the rear window is clear. The de-
froster is automatically deactivated after
approximately 6 to 17 minutes of opera-
tion depending on the outside tempera-
ture.
Activating
Press button
F
(page 159).
The indicator lamp on the button lights
up.
Deactivating
Press button
F
(page 159) again.
The indicator lamp on the button goes
out.
iIf you keep button
e
pressed, the
side windows and the sliding / pop-up
roof will be returned to their previous
positions.
Warning!
G
Any accumulation of snow and ice should be
removed from the rear window before driv-
ing. Visibility could otherwise be impaired,
endangering you and others.!If the rear window defroster switches
off too soon and the indicator lamp
starts blinking, this means that too
many electrical consumers are operat-
ing simultaneously and there is insuffi-
cient voltage in the battery. The system
responds automatically by deactivating
the rear window defroster.
As soon as the battery has sufficient
voltage, the rear window defroster au-
tomatically turns itself back on.
167 Controls in detail
Automatic climate control
Residual heat and ventilation
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual heat produced by the
engine.
Activating
Turn the key in the starter switch to
position1 o r r e m o v e i t f r o m t h e s t a r t e r
switch.
Press button
T
(page 159).
The indicator lamp on button
T
comes on.Deactivating
Press button
T
(page 159).
The indicator lamp on button
T
goes off.
The residual heat is automatically turned
off:
when the ignition is switched on
after about 30 minutes
if the battery voltage dropsVentilated storage compartment under
armrest
The storage compartment under the arm-
rest (
page 200) can be ventilated when
the automatic air conditioning is switched
on. The switch is located inside the storage
compartment in the front. The air tempera-
ture is about the same as that of the center
air vents.
The air volume is dependent on the setting
of:
Air distribution control
Air volume control
Air vents in the dashboard
The air temperature is about the same as
that of the dashboard air vents. It cannot
be regulated separately.
iHow long the system will provide heat-
ing depends on the coolant tempera-
ture and the temperature set by the
operator. The blower will run at speed
setting1 regardless of the air distribu-
tion control setting.
172 Controls in detailPower windowsClosing the side windows and sliding /
pop-up roof with KEYLESS-GO*
Press and hold lock button at door
(page 52) until the side windows and
the sliding / pop-up roof are closed.
Synchronizing power windows
The power windows must be resynchro-
nized each time after the battery has been
disconnected:
Push the power window switches until
the side windows are closed and hold
the switches for approximately one
second.
Warning!
G
When closing the windows and the sliding /
pop-up roof, make sure that there is no dan-
ger of anyone being harmed by the closing
procedure.
The windows will not automatically re-open
if blocked during convenience closing.
If potential danger exists, proceed as fol-
lows:
SmartKey
Release the
‹
button.
Press and hold the
Œ
button until
the windows and the sliding / pop-up
roof open again.
KEYLESS-GO*
Release the lock button.
Pull on the door handle and hold firmly.
The side windows and the
sliding / pop-up roof will open for as long
as the door handle is held but the door
not opened.
175 Controls in detail
Sliding / pop-up roof
Opening (Summer opening feature)
Press and hold button
Œ
after un-
locking the vehicle.
The windows and sliding / pop-up roof
begin to open after approximately one
second.
Release the
‹
button to stop proce-
dure.
Closing (Convenience feature)
Press and hold button
‹
after lock-
ing the vehicle.
The windows and sliding / pop-up roof
begin to close after approximately one
second.
Release the
‹
button to stop proce-
dure.
Make sure that all side windows and the
sliding / pop-up roof are properly closed
before leaving the vehicle.Closing the side windows and sliding /
pop-up roof with KEYLESS-GO*
(Convenience feature)
Press and hold lock button at door
(page 52) until the side windows and
the sliding / pop-up roof are closed.
Synchronizing the sliding / pop-up roof
The power sliding / pop-up roof must be re-
synchronized each time after:
the battery has been disconnected
the sliding / pop-up roof has been
closed manually
the sliding / pop-up roof does not open
smoothly
a malfunction
Press the switch in direction1
(page 173).
Wait until the sliding / pop-up roof is
raised and hold the switch down for
approx. one second.
Warning!
G
When closing the windows and the sliding /
pop-up roof, make sure that there is no dan-
ger of anyone being harmed by the closing
procedure.
If potential danger exists, proceed as fol-
lows:
Release the lock button.
Pull on the door handle and hold firmly.
The side windows and the
sliding / pop-up roof will open for as long
as the door handle is held but the door
not opened.
210 Controls in detailUseful featuresThe Tele Aid system
(Telematic A
larm I
dentification on D
e-
mand)
The Tele Aid system consists of three types
of response:
Automatic and manual emergency
Roadside Assistance and
Information
The Tele Aid system is operational provid-
ing that the vehicle’s battery is charged,
properly connected, not damaged and cel-
lular and GPS coverage is available.
The speaker volume of a Tele Aid call can
be adjusted using the volume control on
the multifunction steering wheel. To raise,
press button
æ
and to lower, press
button
ç
.
To activate, press the SOS button, the
Roadside Assistance button
•
or
the Information button
¡
, depend-
ing on the type of response required.Shortly after the completion of your Ac-
quaintance Call, you will receive a user ID
and password via first call mail. By visiting
www.mbusa.com and selecting “Tele Aid”
( U S A o n l y ) , y o u w i l l h a v e a c c e s s t o a c c o u n t
information, remote door unlock, profile
and more.System self-check
Initially, after turning the key in starter
switch to position2, malfunctions are de-
tected and indicated (the indicator lamps
in the SOS button, the Roadside Assis-
tance button
•
and the Information
button
¡
stay on longer than
10 seconds or do not come on). The mes-
sage
TELE AID – VISIT WORKSHOP!
ap-
pears for approx. 10 seconds in the
multifunction display.
iThe SOS button is located above the in-
terior rear view mirror.
The Roadside Assistance button
•
and the Information button
¡
are
located below the center armrest cov-
er.
!The Tele Aid system utilizes the cellular
network for communication and the
GPS (Global Positioning System) satel-
lites for vehicle location. If either of
these signals are unavailable, the
Tele Aid system may not function and if
this occurs, assistance must be sum-
moned by other means.
243 Operation
Engine compartment
The coolant expansion tank is located on
the passenger side of the engine compart-
ment.
1Coolant expansion tank
Using a rag, turn the cap slowly approx-
imately one half turn to the left to re-
lease any excess pressure.
Continue turning the cap to the left and
remove it.The coolant level is correct if the level
for cold coolant: reaches the black top
part of the reservoir
for warm coolant: is approx. 0.6 in
(1.5 cm) higher
Add coolant as required.
Replace and tighten cap.
More information on coolant can be found
in the “Technical data” section
(
page 342).
Battery
Your vehicle’s battery is located in the
trunk under the right hand wheel well cov-
er panel (
page 313).
The battery should always be sufficiently
charged in order to achieve its rated ser-
vice life. Refer to Service Booklet for bat-
tery maintenance intervals.
If you use your vehicle mostly for short dis-
tance trips, you will need to have the bat-
tery charge checked more frequently.
When replacing the battery, always use
batteries approved by Mercedes-Benz.
If you do not intend to operate your vehicle
for an extended period of time, consult an
authorized Mercedes-Benz Center about
steps you need to observe.
244OperationEngine compartment
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.Windshield washer system and
headlamp cleaning system
Fluid for the windshield washer system and
the headlamp cleaning system is supplied
from the windshield washer reservoir. It
has a capacity of approx. 7.1 US qt. (6.7 l).
During all seasons, add MB Windshield
Washer Concentrate “S” to water. Premix
the windshield washer fluid in a suitable
container.
Refill the reservoir with MB Windshield
Washer Concentrate and water (or
commercially available pre-mixed
windshield washer solvent / antifreeze,
depending on ambient temperatures).
Always use washer solvent/antifreeze
where temperatures may fall below
freezing. Failure to do so could result in
damage to the washer system/reser-
voir.
G
Observe all safety instructions
and precautions when handling
automotive batteries.
A
Risk of explosion
D
Keep flames or sparks away
from battery. Do not smoke.
B
Battery acid is caustic. Do not
allow it to come into contact
with skin, eyes or clothing.
In case it does, immediately
flush affected area with clear
water and seek medical help if
necessary.
E
Wear eye protection.
C
Keep children away.
F
Follow the instructions in this
Operator's Manual.
252OperationWinter driving
Winter drivingBefore the onset of winter have your vehi-
cle winterized at an authorized
Mercedes-Benz Center. This service in-
cludes:
Check of anticorrosion and antifreeze
concentration.
Addition of cleaning concentrate to the
water of the windshield and headlamp
cleaning system. Add MB Concentrate
“S” to a pre-mixed windshield washer
solvent / antifreeze which is formulated
for temperatures below freezing point
(page 343)
Battery test. Battery capacity drops
with decreasing ambient temperature.
A well-charged battery helps to ensure
that the engine can be started even at
low ambient temperatures.
Tire change. We recommend M+S rat-
ed radial-ply tires on all four wheels for
the winter season.
Winter tires
Always use winter tires at temperatures
below 39°F (4°C) and whenever wintry
road conditions prevail. Use of winter tires
is the only way to achieve the maximum ef-
fectiveness of the ABS and the ESP in win-
ter operation.
For safe handling, ensure that all mounted
winter tires are of the same make and have
the same tread design.Always observe the speed rating of the
winter tires installed on your vehicle. If the
maximum speed for which your tires are
rated is below the speed rating of your ve-
hicle, you must place a notice to this effect
where it will be seen by the driver. Such no-
tices are available from your tire dealer or
from any authorized Mercedes-Benz
Center.Warning!
G
Winter tires with a tread depth under 0.16 in
(4 mm) must be replaced. They are no long-
er suitable for winter operation.
Warning!
G
If you use your spare tire when winter tires
are fitted on the other wheels, be aware that
the difference in tire characteristics may
very well impair turning stability and that
overall driving stability may be reduced.
Adapt your driving style accordingly.
Have the spare tire replaced with a winter
tire at the nearest authorized
Mercedes-Benz Center.