180 Controls in detailGood visibilityFor information on windshield wiper opera-
tion, see “Windshield wipers” (
page 57).
Headlamp cleaning system
The button is located on the left side of the
dashboard.
1Headlamp washer button
Switch on the ignition (
page 39).
Press button1.
The headlamps are cleaned with a
high-pressure water jet.
For information on filling up the washer flu-
id reservoir, see “Windshield washer sys-
tem and headlamp cleaning system”
(
page 282).
Rear view mirrors
For information on setting the rear view
mirrors, see “Mirrors” (
page 47).
Auto-dimming rear view mirrors
The reflection brightness of the exterior
rear view mirror on the driver’s side and
the interior rear view mirror will respond
automatically to glare when
the ignition is switched on
and
incoming light from headlamps falls on
the sensor in the interior rear view mir-
ror.
The interior rear view mirror will not react if
reverse gear is engaged
the interior lighting is switched on
i
The headlamps will automatically be
cleaned when you have
switched on the headlamps
and
operated the windshield wipers with wind-
shield washer fluid fifteen times
When you switch off the ignition, the counter re-
sets.
187 Controls in detail
Automatic climate control
Deactivating the automatic climate control system
Deactivating
Press button ´ (
page 185).
The indicator lamp on the button
comes on.Reactivating
Press button ´ (
page 185).
The indicator lamp on the button goes
out.
The previous settings are in effect
again.
or
Turn one of the temperature controls
on the automatic climate control panel
(page 185).
The indicator lamp on button ´
goes out.Operating the automatic climate
control system in automatic mode
Air distribution and air volume can be
adjusted automatically by the automatic
climate control system. You can also ad-
just the settings for air distribution and air
volume manually.
Warning!
G
When the automatic climate control system
is switched off, the outside air supply and
circulation are also switched off. Only
choose this setting for a short time when the
retractable hardtop is closed. Otherwise the
windows could fog up, impairing visibility
and endangering you and others.
i
When operating the automatic climate
control system in automatic mode, you will only
rarely need to adjust the temperature, air volume
and air distribution.
In automatic mode, cooling with dehumidify is
switched on. This function can be switched off if
necessary (
page 185).
198 Controls in detailPower windowsFully closing the door windows
(Express-close)
Pull switch1 or2 past the resis-
tance point and release.
The corresponding door window closes
completely.
If the upward movement of the door win-
dow is blocked during the closing proce-
dure, the door window will stop and open
slightly.
Stopping windows
Press or pull the respective switch
again.Closing the windows with
KEYLESS-GO*
Press and hold lock button on an out-
side door handle (
page 64) until the
windows are closed.
Synchronizing power windows
The power window must be synchronized
each time
after the battery has been disconnect-
ed
if the power windows cannot be fully
opened (Express-open) or closed
(Express-close)
Synchronizing the power windows
Switch on the ignition (
page 39).
Pull the power window switches until
the side windows are closed.
Hold the switches for approximately
1 second.
The power windows are synchronized.
Warning!
G
Driver’s door only:
If within 5 seconds the switch is again
pulled past the resistance point and re-
leased, the automatic reversal will not
operate.
Warning!
G
When closing the windows make sure that
there is no danger 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:
Release the lock button.
Pull on the door handle and hold firmly.
The side windows open for as long as
the door handle is held but the door not
opened.
209 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
Distance warning function* (only avail-
able with Distronic*), which warns of
stationary objects or slower moving ve-
hicles that you are closing in on too
quickly
ABC with vehicle level control systems,
with which you can change vehicle sus-
pension characteristics
Parktronic*, which assists the driver
during parking maneuvers
For information on the BAS, ABS, ESP
®,
and the electro-hydraulic brake system,
see “Driving safety systems” (
page 87).
Cruise control
The cruise control automatically maintains
the speed you set for your vehicle.
The use of the cruise control is recom-
mended for driving at a constant speed for
extended periods of time.
You can set or resume the 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 24).
Warning!
G
The cruise control is a convenience system
designed to assist the driver during vehicle
operation. The driver is and must always
remain responsible for the vehicle’s speed
and for safe brake operation.
Only use the cruise control if the road,
traffic, and weather conditions make it ad-
visable to travel at a constant speed.
The use of the cruise control can be dan-
gerous on winding roads or in heavy traf-
fic because conditions do not allow safe
driving at a constant speed.
The use of the cruise control can be dan-
gerous 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.
213 Controls in detail
Driving systems
Distronic*
When activated, the Distronic adaptive
cruise control system increases the driving
convenience afforded by the cruise control
while traveling on expressways and other
major roadways.
If the Distronic distance sensor detects
a slower moving vehicle directly ahead,
your vehicle’s speed will be reduced so
that you follow that vehicle at the pre-
set following distance.
If there is no vehicle directly ahead of
you, Distronic will function in the same
way as standard cruise control
(page 209).
Warning!
G
Distronic adaptive cruise control is not a
substitute for active driving involvement. It
does not react to pedestrians or stationary
objects, recognize or predict the lane curva-
ture nor the movement of preceding
vehicles.
Distronic can only apply a maximum of 20%
of the vehicle’s braking power.
It is the driver’s responsibility at all times to
be attentive to the road, weather and traffic
conditions. In addition, the driver must pro-
vide the steering, braking and other driving
inputs necessary to remain in control of the
vehicle.Warning!
G
Distronic is a convenience system. Its speed
adjustment reduction capability is intended
to make cruise control more effective and
usable when traffic speeds vary. It is not
however, intended to, nor does it, replace
the need for extreme care. The responsibili-
ty for the vehicle’s speed, distance to the
preceding vehicle and, most importantly,
brake operation to assure a safe stopping
distance, always rests with the driver.
Warning!
G
Distronic requires familiarity with its opera-
tional characteristics. We strongly recom-
mend that you review the following
information carefully before operating the
system.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 constant
speed.
214 Controls in detailDriving systemsWarning!
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, heavy rain, snow or
sleet.
Warning!
G
Distronic cannot take weather conditions
into account. Switch off Distronic or do not
switch 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 dimin-
ished due to snow, rain or fog for exam-
ple
The distance control system functional-
ity could be impaired.
Always pay attention to surrounding traffic
conditions even while Distronic is switched
on. Otherwise, you may not be able to recog-
nize dangerous situations until it is too late.
This could cause an accident in which you
and/or others could be injured.
Warning!
G
Close attention to road and traffic condi-
tions is imperative at all times, regardless of
whether or not Distronic is activated.
Use of Distronic can be dangerous on wind-
ing roads or in heavy traffic because condi-
tions do not allow safe driving at a constant
speed.
Distronic will not react to stationary objects
on the roadway (e.g. a stopped vehicle in a
traffic jam or a disabled vehicle). Distronic
will also not respond to oncoming vehicles.
220 Controls in detailDriving systemsSetting to last stored speed
(“Resume” function)
Briefly pull the cruise control lever in
direction of arrow4 (
page 218).
Distronic resumes the last stored
speed or, if no speed is stored, it will
set and store the current speed.
Remove your foot from the accelerator
pedal.Deactivating Distronic
There are several ways to deactivate the
Distronic system:
Step on the brake pedal.
or
Briefly push the cruise control lever in
direction of arrow3 (
page 218).
Distronic will be deactivated. The last set
speed will be stored into memory.
The following message appears in the mul-
tifunction display for approximately
5 seconds:
DTR off
Warning!
G
The set speed stored in memory should only
be set again if prevailing road conditions
permit. Possible acceleration or decelera-
tion differences arising from returning to the
preset speed could caused an accident
and/or serious injury to you and others.
i
The last stored set speed is deleted when
the engine is turned off.
i
Distronic deactivates automatically when
you depress the parking brake pedal
the vehicle speed is below
20 mph (30 km/h) (
page 218)
the ESP
® is in operation or switched off with
the ESP® switch (
page 91)
you move the gear selector lever into
positionN
An acoustic warning sounds and the mes-
sage
DTR off
appears in the multifunction
display for approximately 5 seconds.
Warning!
G
Distronic switches off and releases the
brakes when the vehicle decelerates below
the minimum speed of 20 mph (30 km/h)
by operation of the system. At that time the
driver must apply the brakes in order to
reduce vehicle speed further or bring it to a
stop.
221 Controls in detail
Driving systems
Setting the following distance in
Distronic
You can set the specified following dis-
tance for Distronic by varying the time set-
ting between 1.0 and 2.0 seconds. Using
this time setting and the current speed of
your vehicle, Distronic calculates and sets
the required following distance to the pre-
ceding vehicle. The set distance will ap-
pear in the right multifunction display
(page 217).
The distance setting thumbwheel for the
time setting is located on the lower section
of the center console.1Thumbwheel for setting following
distanceIncreasing distance
Increasing the distance setting tells
Distronic to maintain a greater following
distance to the preceding vehicle.
Turn thumbwheel1 towards ¯.
Decreasing distance
Decreasing the distance setting tells
Distronic to maintain a shorter following
distance to the preceding ahead.
Turn thumbwheel1 towards ®.
!
Moving the gear selector lever to positionN
while driving cancels the Distronic. However, the
gear selector lever should not be moved to
positionN while driving except to coast when
the vehicle is in danger of skidding (e.g. on icy
roads).
i
Depressing the accelerator pedal does not
deactivate the Distronic. After brief acceleration
(e.g. for passing), the Distronic will resume the
last speed set.
Warning!
G
It is up to the driver to exercise discretion to
select the appropriate setting given road
conditions, traffic, driver’s preferred driving
style and applicable laws and driving recom-
mendations for safe following distance.