Page 185 of 416

185 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 SmartKey in the starter switch 
to position1 or remove it from the 
starter switch.
Press button
T
 (page 175).
The indicator lamp on button
T
 
comes on.
Deactivating
Press button
T
 (page 175).
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 drops
!Do not obstruct the air vent in the stor-
age compartment.iThe storage compartment can be heat-
ed or cooled.
The compartment can get very warm 
due to its confined space. When storing 
heat sensitive objects in the compart-
ment, close the air vent (
page 184) 
while heating the passenger compart-
ment.
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. 
     
        
        Page 191 of 416
191 Controls in detail
Power windows
Synchronizing power windows
The power windows must be resynchro-
nized each time after the battery has been 
disconnected:
Press the power window switches until 
the side windows are closed and hold 
the switches for approximately one 
second. 
     
        
        Page 195 of 416
195 Controls in detail
Sliding/pop-up roof
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.
Wait until the sliding/pop-up roof is 
raised and hold the switch down for 
approximately one second. 
     
        
        Page 237 of 416

237 Controls in detail
Useful features
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 using the volume control on 
the multifunction steering wheel. To turn 
volume up, press button
æ
. Press 
button
ç
to turn volume down.
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” 
(USA only), you will have access to account 
information, remote door unlock, and 
more.
!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 
SmartKey in starter switch to 
position2 or pressing KEYLESS-GO* 
start/stop button (if so equipped) 
twice to position2 (
page 33). The 
message 
TELE AID – NOT ACTIVATED
 
will be shown in the multifunction dis-
play 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).
iThe SOS button is located above the in-
side rear view mirror.
The Roadside Assistance button
•
 
and the Information button
¡
 are 
located below the center armrest cov-
er. 
     
        
        Page 270 of 416

270 OperationEngine compartmentBattery
Your vehicle’s battery is located on the 
right side of the trunk floor (
page 344).
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.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 278 of 416

278 OperationWinter 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 premixed windshield washer 
solvent / antifreeze which is formulated 
for temperatures below freezing point 
(page 376).
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, 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 from your tire dealer or 
from any authorized Mercedes-Benz 
Center.Warning!
G
Winter tires with a tread depth of less than 
0.16 in. (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 281 of 416

281 Operation
Maintenance
Calling up the service indicator
Switch on ignition.
The standard display of the control sys-
tem appears (
page 135).
Press button 
k
 or 
j
 on the mul-
tifunction steering wheel until FSS indi-
cator with the service symbol 
9
 or 
´
 and the service deadline appears 
in the multifunction display.
Resetting the service indicator 
In the event that the service on your vehi-
cle is not carried out by an authorized 
Mercedes-Benz Center, you can reset the 
service indicator yourself.
Switch on ignition.
The standard display of the control sys-
tem appears (
page 135).
Press button 
k
 or 
j
 on the mul-
tifunction steering wheel until the FSS 
indicator with the service symbol 
9
 
or 
´
 and the service deadline ap-
pears in the multifunction display.
Press the reset button 
J
(page 22) 
to the right in the instrument cluster for 
about two seconds.
This message appears in the multifunc-
tion display:
SERVICE INTERVAL?
RESET WITH R BUTTON
To confirm, hold down the reset knob 
until you hear a signal.
The service indicator now displays the 
reset interval.
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 
:
.
iIf the service indicator was inadvertent-
ly reset, have a Mercedes-Benz Center 
correct it.
Only reset if the proper service has 
been performed. Resetting the system 
without performing proper service as 
called for by the FSS will cause the FSS 
to incorrectly determine the next ser-
vice interval which will result in engine 
damage not covered by the 
Mercedes-Benz Limited Warranty. 
     
        
        Page 289 of 416
289 Practical hints
What to do if …?
Where will I find ...?
Unlocking/locking in an emergency
Opening/closing in an emergency
Replacing bulbs
Replacing wiper blades
Flat tire
Battery
Jump starting
Towing the vehicle
Fuses