Page 228 of 521

227 Controls in detail
4-zone automatic climate control*
Air conditioning
The cooling function, only operational 
when the engine is running, cools the vehi-
cle interior down to the selected tempera-
ture. The cooling function also 
dehumidifies the air in the vehicle interior, 
thus preventing the windows from fogging 
up.Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the climate 
control system. The air in the vehicle will 
then no longer be cooled or dehumidified.
Press button2 (
page 216) or 
(
page 217).
The indicator lamp on the button goes 
out.
Activating
Moist air can fog up the windows. You can 
dehumidify the air with the air condition-
ing.
Press button2 (
page 216) or 
(
page 217) again. 
The indicator lamp on the button 
comes on.
The air conditioning uses the refrigerant 
R134a. This refrigerant is free of CFCs 
which are harmful to the ozone layer.
iCondensation may drip out from under-
neath the vehicle. This is normal and 
not an indication of a malfunction.Warning!
G
If you turn off the cooling function, the 
vehicle will not be cooled when weather 
conditions are warm. The windows can fog 
up more quickly. Window fogging may 
impair visibility and endanger you and 
others.
!If the air conditioning cannot be turned 
on again, this indicates that the air con-
ditioning is losing refrigerant. The com-
pressor has turned itself off.
Have the air conditioning checked at 
the nearest authorized Mercedes-Benz 
Center. 
     
        
        Page 231 of 521

230 Controls in detail4-zone automatic climate control*Adjusting air distribution
Push the slide for the left center 
vent1 or right center vent2 to the 
left, right, up, or down.
The air flow is directed in the 
corresponding direction.
Adjusting air volume
Turn thumbwheel3 or 7 
(page 229) up or down.
The air volume is increased or 
decreased.Adjusting the rear settings with the 
front control panel
You can adjust the temperature for the 
rear climate control from the front climate 
control panel.
Press button™ or 5 
(page 216) or (
page 217).
The display switches over.
1Rear climate control display
Set the desired temperature for the 
rear passenger compartment using 
temperature rocker switches4 
and6 (
page 229).
After approximately 5 seconds after 
the last adjustment, the display switch-
es back to its standard display.
iThe rear climate control will not cool 
the air when the air conditioning is 
switched off (
page 227).
iFor draft-free ventilation, push 
slides1 and 2 (
page 229) upward.
iYou can also press button™ or 
5 (
page 216) or (
page 217) 
once more to switch back to the stan-
dard display.
 
     
        
        Page 244 of 521

243 Controls in detail
Driving systems
Driving systems
The driving systems of your vehicle are de-
scribed on the following pages:
Cruise control and Distronic*, with 
which the vehicle can maintain a preset 
speed
Airmatic DC* adjusts the vehicle sus-
pension characteristics automatically 
and controls the vehicle level
Parktronic system*, which assists the 
driver during parking maneuvers
For information on BAS, ABS, electrohy-
draulic brake system and ESP
® driving sys-
tems, see “Driving safety systems” 
(
page 92).
Cruise control
The cruise control automatically maintains 
the speed you set for your vehicle.
Use of cruise control is recommended for 
driving at a constant speed for extended 
periods of time. You can set or resume 
cruise control at any speed above 20 mph 
(30 km/h).
The cruise control function is operated by 
means of the cruise control lever.
The cruise control lever is the uppermost 
lever on the left-hand side of the steering 
column (
page 22).
Warning!
G
The cruise control is a convenience system 
designed to assist the driver during vehicle 
operation. The driver is and must remain at 
all times responsible for the vehicle speed 
and for safe brake operation.
Only use the cruise control if the road, traffic 
and weather conditions make it advisable to 
travel at a steady speed.
The use of cruise control can be danger-
ous on winding roads or in heavy traffic 
because conditions do not allow safe 
driving at a steady speed.
The use of cruise control can be danger-
ous on slippery roads. Rapid changes in 
tire traction can result in wheel spin and 
loss of control.
Deactivate the cruise control when driv-
ing in fog.
The “Resume” function should only be oper-
ated if the driver is fully aware of the previ-
ously set speed and wishes to resume this 
particular preset speed. 
     
        
        Page 249 of 521

248 Controls in detailDriving systems
iCanada only:
This device complies with RSS-210 of 
Industry Canada. Operation is subject 
to the following two conditions:
(1) This device may not cause interfer-
ence, and
(2) this device must accept any inter-
ference received, including interfer-
ence that may cause undesired 
operation of the device.
Any unauthorized modification to this 
device could void the user’s authority 
to operate the equipment.Warning!
G
Distronic cannot take street and traffic con-
ditions into account. Only use Distronic if 
the road, weather and traffic conditions 
make it advisable to travel at a steady 
speed.
Warning!
G
Use of Distronic can be dangerous on slip-
pery roads. Rapid changes in tire traction 
can result in wheel spin and loss of control.
Distronic does not act upon adverse sight 
distance conditions. Do not use Distronic 
during conditions of fog and heavy rain, 
snow or sleet.
Warning!
G
Distronic cannot take weather conditions 
into account. Switch off Distronic or do not 
turn it on if:
roads are slippery or covered with snow 
or ice. The wheels could lose traction 
while braking or accelerating, and the 
vehicle could skid.
the sensor is dirty or visibility is 
diminished due to snow, rain or fog. The 
distance control could be impaired.
Always pay attention to traffic conditions 
even while Distronic is switched on. Other-
wise, you may not be able to recognize 
dangerous situations until it is too late and 
could cause an accident resulting in person-
al or fatal injury to you or others. 
     
        
        Page 260 of 521

259 Controls in detail
Driving systems
Narrow vehicles
Because of their narrow profile, the vehi-
cles traveling near the outer edges of the 
lane have not yet been detected by Dis-
tronic. There will be insufficient distance to 
the vehicles ahead.
Airmatic DC (Dual Control)*
Airmatic automatically selects the opti-
mum suspension tuning and ride height for 
your vehicle. The Airmatic consists of two 
components:
Adaptive Damping System (ADS)
Vehicle level control
The ADS automatically selects the opti-
mum damping for the respective driving 
conditions. At the same time the suspen-
sion is set to either Sport 1, Sport 2 or 
Comfort.Suspension tuning
The suspension tuning is set according to:
Your driving style
Road surface conditions
Your choice of suspension style, 
Sport 1, Sport 2 or Comfort, which you 
select using the damping button1 
(page 260).
The following suspension styles are 
available:
Comfort
Both indicator lamps2 
(page 260) are off.
Sport 1
One indicator lamp2 
(page 260) is on.
Sport 2
Both indicator lamps2 
(page 260) are on. 
     
        
        Page 262 of 521
261 Controls in detail
Driving systems
Select the raised level only when required 
by current driving conditions. Otherwise
handling may be impaired
fuel consumption may increaseiThese height adjustments are so small 
that you may not notice any change.Warning!
G
To help avoid personal injury, keep hands 
and feet away from wheel housing area, and 
stay away from under the vehicle when low-
ering the vehicle chassis. 
     
        
        Page 284 of 521

283 Controls in detail
Useful features
Power outlet
The power outlet is located in the rear pas-
senger compartment.
Switch on the ignition (
page 36).
Flip up cover and insert electrical plug 
(cigarette lighter type).
Heated steering wheel*
The steering wheel heating warms up the 
leather area of the steering wheel.
The stalk is on the lower left-hand side of 
the steering wheel.
1Indicator lamp
2Switching off
3Switching onSwitching on
Switch on the ignition (
page 36).
Turn switch at the tip of stalk in direc-
tion of arrow3.
The steering wheel is heated. Indicator 
lamp1 comes on.
iThe power outlet can be used to 
accommodate 12V DC electrical ac-
cessories (e.g. air pump, auxiliary 
lamps) up to a maximum of 180 W.
An additional power outlet is located on 
the left side in the trunk.
iThe steering wheel heating is tempo-
rarily suspended while indicator 
lamp1 remains on when
the temperature of the vehicle inte-
rior is above 86°F (30°C)
the temperature of the steering 
wheel is above 95°F (35°C)
When these conditions do not apply 
anymore, steering wheel heating con-
tinues. 
     
        
        Page 308 of 521

307 Operation
Driving instructions
Tires
Treadwear indicators (TWI) are required by 
law. These indicators are located in six 
places on the tread circumference and be-
come visible at a tread depth of approxi-
mately 
1/16 i n  ( 1 . 6 m m ) ,  a t  w h i c h  p o i n t  t h e  
tire is considered worn and should be re-
placed.The treadwear indicator appears as a solid 
band across the tread.
Specified tire inflation pressures must be 
maintained. This applies particularly if the 
tires are subjected to high loads (e.g. high 
speeds, heavy loads, high ambient temper-
atures).
Hydroplaning
Depending on the depth of the water layer 
on the road, hydroplaning may occur, even 
at low speeds and with new tires. Reduce 
vehicle speed, avoid track grooves in the 
road and apply brakes cautiously in the 
rain.
Warning!
G
If you feel a sudden significant vibration or 
ride disturbance, or you suspect that possi-
ble damage to your vehicle has occurred, 
you should turn on the hazard warning flash-
ers, carefully slow down, and drive with cau-
tion to an area which is a safe distance from 
the road.
Inspect the tires and the vehicle underbody 
for possible damage. If the vehicle or tires 
appear unsafe, have the vehicle towed to 
the nearest Mercedes-Benz Center or tire 
dealer for repairs.
Warning!
G
Although the applicable federal motor vehi-
cle safety laws consider a tire to be worn 
when the treadwear indicators (TWI) be-
come visible at approximately 
1/16in 
(1.6 mm), we recommend that you do not al-
low your tires to wear down to that level. As 
tread depth approaches 
1/8in (3 mm), the 
adhesion properties on a wet road are 
sharply reduced.
Depending upon the weather and/or road 
surface (conditions), the tire traction varies 
widely. 
Warning!
G
Do not drive with a flat tire. A flat tire affects 
the ability to steer or brake the vehicle. You 
may lose control of the vehicle. Continued 
driving with a flat tire or driving at high 
speed with a flat tire will cause excessive 
heat build-up and possibly a fire.