Page 195 of 442

195 Controls in detail
Automatic climate control*
The residual heat is automatically turned
off
when the ignition is switched on
after about 30 minutes
if the battery voltage drops
Rear air conditioning
1Left rear center air vent, adjustable
2Right rear center air vent, adjustable
3Thumbwheel for air volume control for
right rear center air vent
4Temperature rocker switch, right
5Display
6Temperature rocker switch, left
7Thumbwheel for air volume control for
left rear center air vent
Display1Temperature, left
2Temperature, right
Basic settings
We recommend setting the temperature
on both the left- and right-hand sides to
72°F. This ensures a pleasant temperature
in the rear of the vehicle.
The temperatures for the left- and
right-hand sides can be set using tempera-
ture rocker switches4 and6.
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
setting 1 regardless of the air distribu-
tion control setting.
Page 200 of 442

200 Controls in detailPower windowsClosing the side windows with KEY-
LESS-GO*
Press and hold lock button at door
(page 54) until the side windows and
the sliding / pop-up roof or panorama
sliding/pop-up roof* are closed.
Synchronizing power windows
The power window must be resynchro-
nized each time
after the battery has been disconnect-
ed.
if the power windows cannot be fully
opened (Express-open) or closed (Ex-
press-close).
Synchronizing the power windows
Switch on ignition.
Pull the power window switches until
the side windows are closed.
Hold the switches for approximately
one second.
The power windows are synchronized.
Warning!
G
When closing the windows and the
sliding / pop-up roof*, be sure that there is
no danger 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.
Page 204 of 442
204 Controls in detailSliding / pop-up roof*Synchronizing the sliding / pop-up roof
The sliding / pop-up roof must be resyn-
chronized each time
after the battery has been disconnect-
ed
the sliding / pop-up roof has been
closed manually (
page 358)
the sliding / pop-up roof does not open
smoothly
a malfunctionSynchronizing
Remove the fuse from the main fuse
box (
page 385).
Replace the fuse in the main fuse box.
Switch on the ignition.
Press and hold the switch in
direction3 until the sliding/pop-up
roof is fully raised at the rear.
Hold the switch for approximately one
second.
The sliding/pop-up roof is synchro-
nized.
Page 209 of 442

209 Controls in detail
Panorama sliding / pop-up roof*
Closing the panorama sliding / pop-up
roof with KEYLESS-GO*
The power windows (
page 197) will also
be closed when the panorama
sliding / pop-up roof is operated with
KEYLESS-GO.
Press and hold lock button at driver’s
door (
page 54) until the side win-
dows and the panorama
sliding / pop-up roof are closed.Synchronizing the panorama
sliding / pop-up roof
It is necessary to resynchronize the pan-
orama sliding / pop-up roof after
voltage supply interruption due to a
disconnected or discharged battery
the roof has been closed manually
the roof has been opened with an
abrupt movement
a malfunction.
Remove the fuse from the main fuse
box (
page 385).
Replace the fuse in the main fuse box.
Switch on ignition.
Press the switch in direction2
(page 206).
Warning!
G
When closing the windows and the panora-
ma sliding /pop-up roof, be sure that there is
no danger 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 panorama
sliding/pop-up roof will open for as long
as the door handle is held but the door
is not opened.
Page 250 of 442

250 Controls in detailUseful featuresYou can take and place telephone calls us-
ing thes andt buttons on the
steering wheel. To carry out other tele-
phone functions, use the control system
(page 129).
See separate operating manual for instruc-
tions on how to use the telephone.
Tele Aid* The Tele Aid system
(Tele
matic 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 when using the volume control
on the multifunction steering wheel. To
raise, press buttonæ and to lower,
press buttonç.
To activate, press the SOS button, the
Roadside Assistance button• or
the Information button¡, depend-
ing on the type of response required.
Bear in mind that at a speed of just 30 mph
(approximately 50 km / h), your vehicle is
covering a distance of approximately
44 feet (approximately 13.5 m) every sec-
ond.Warning!
G
Some jurisdictions prohibit the driver from
using a cellular telephone while driving a ve-
hicle. Whether or not prohibited by law, for
safety reasons, the driver should not use the
cellular telephone while the vehicle is in mo-
tion.
Stop the vehicle in a safe location before an-
swering or placing a call.
!The initial activation of the Tele Aid sys-
tem may only be performed by com-
pleting the subscriber agreement and
placing an acquaintance call using the
SOS button. Failure to complete either
of these steps will result in a system
that is not activated. If the system is
not activated, the indicator lamp in the
SOS button stays on after turning the
SmartKey in starter switch to
position2, or pressing the
KEYLESS-GO* start/stop button twice
to position2. The message
Tele Aid –
not activated
will be shown in the
multifunction display for approximately
10 seconds.
If you have any questions regarding ac-
tivation, please call the Response Cen-
ter at 1-800-756-9018 (in the USA) or
1-888-923-8367 (in Canada).
Page 287 of 442

287 Operation
Engine compartment
Battery
Your vehicle is equipped with two batter-
ies:
Auxiliary battery (located in the engine
compartment).
Main battery (starter and electrical
consumers; located in the trunk).
These batteries should always be suffi-
ciently charged in order to achieve their
rated service life. Refer to Service Booklet
for battery 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 batteries, always use bat-
teries 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.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.
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.
Page 295 of 442

295 Operation
Winter driving
Winter driving
Before 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 premixed windshield washer
solvent / antifreeze which is formulated
for temperatures below freezing point
(page 406).
Battery test. Battery capacity drops
with decreasing ambient temperature.
A well charged battery helps to ensure
that the engine can be started and the
SBC brake system will be fully opera-
tional, even at low ambient tempera-
tures.
Tire change. Mercedes-Benz recom-
mends M+S rated radial-ply tires with a
minimum tread depth of approximately 1/6 in (4 mm) on all four wheels for the
winter season.
Winter tires
Always use winter tires at temperatures
below 45°F (7°C) and whenever wintry
road conditions prevail. Use of winter tires
is the only way to achieve the maximum ef-
fectiveness of the ABS, ESP and 4MATIC in
winter 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 at your tire dealer or any
authorized Mercedes-Benz Center.Warning!
G
Winter tires with a tread depth of less than 1/6in (4 mm) must be replaced. They are no
longer 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.
Page 298 of 442

298 OperationMaintenanceClearing the service indicator
You can clear the service indicator
Press the j button on the multi-
function steering wheel.
The service indicator is cleared and the
standard display appears in the multi-
function display.
Service term exceeded
If you have exceeded the suggested ser-
vice term, you will see the following mes-
sage in the multifunction display:Service A exceeded by XXXXX miles (km)
Service A exceeded by XXX days
Service A exceeded by X day Any authorized Mercedes-Benz Center will
reset the service indicator following a com-
pleted service.
Calling up the service indicator
Switch the ignition on.
The standard display of the control sys-
tem appears (
page 129).
Press buttonk orj on the mul-
tifunction steering wheel until the
FSS PLUS indicator appears in the mul-
tifunction display.
Resetting the service indicator
In the event that a service on your vehicle
is not carried out by an authorized
Mercedes-Benz Center, you can reset the
service indicator yourself.
Switch the ignition on.
The standard display of the control sys-
tem appears (
page 134).
Press buttonk orj on the mul-
tifunction steering wheel until the
FSS PLUS indicator appears in the mul-
tifunction display.
Press the reset button (
page 22) for
about five seconds.
iIf the battery is disconnected, the days
of disconnection will not be included in
the count shown by the service indica-
tor. To arrive at the true service dead-
line, you will need to subtract these
days from the days shown in the ser-
vice indicator.
Do not confuse the service indicator
with the engine oil level indicator :.