
The hazard warning lamps automatically
switch on if:
R
an airbag is deployed.
R you brake sharply and bring the vehicle to
ah alt from aspeed of more than
70 km/h.
The hazard warning lamps still operate if the
ignition is switched off.
X To switch on: press button0046.
All turn signals flash.
X To switch off: press button0046.
X To switch off the hazard warning lamps
using the combination switch: if the haz-
ard warning lamps are on, push the combi-
nation switch in the direction of arrow 0071
or 0073 beyond the pressure point
(Y page 82).
The indicator lamp on the corresponding
side of the vehicle flashes.
The hazard warning lamp switches off auto-
matically after full brake application if the
vehicle then reaches aspeed of over
10 km/ha gain.
Intelligent Light System* (bi-xenon
headlamps*) The Intelligent Light System is
asystem which
adjusts the headlamps automatically to suit
the prevailing driving and weather conditions.
The bi-xenon headlamps offer enhanced func-
tions to improve illumination of the road sur-
face, e.g. depending on the vehicle speed or
weather conditions. The system includes the
active light function, cornering light function,
motorway mode and extended range fog-
lamps. The system is only active when it is
dark.
You can activat eordeactivate the "Intelligent
Light System" using the on-board computer
(Y page 119). Active light function
The active light function is
asystem that
moves the headlamps accordin gtothe steer-
ing movements of the frontw heels. In this
way, relevant areas remain illuminated while
driving. This allows you to recognise pedes-
trians, cyclists and animals.
Cornering light function The cornering light function improves the illu-
mination of the road over
awide angle in the
direction you are turning, enabling better vis-
ibility in tight bends, for example. It can only
be activated when the dipped-beam head-
lamps are switched on.
Active:
R if you are driving at speeds below
40 km/h, the cornering light function is
activated either by the turn signal or by the
steerin gwheel being turned.
R if you are driving at speeds between
40 km/ha nd 70 km/h ,the cornerin glight
function is activated by th esteering wheel
bein gturned. Lights
85Controls
*optional
207_AKB
;2;3,en-GB
mkalafa ,V ersion: 2.11.8.1
2009-07-23T10:23:49+02:00
-Seite 85 Z

G
Risk of accident
Adaptiv eHighbea mAssist is only an aid
designe dtoassist driving .The driver is
responsibl efor adjusting the vehicle's lighting
to the prevailing light, vision and traffi ccon-
ditions.
The system may be impaired or deactivated:
R if there is poo rvisibility ,e.g. du etosnow,
rain, fog or spray
R if the are aofthe windscreen around the
optical senso risdirty, misted up or covered
up ,e.g. by asticker
The system may not recognise the following
roa dusers:
R roa dusers that have no lighting, e.g. pedes-
trians
R roa dusers that have poo rlighting, e.g.
cyclists
R roa dusers whose lighting is not clearl yvisi-
ble, e.g. roa dusers behind acras hb arrier
R on rar eoccasions: roa dusers that have
lights that may be recognise dtoo late or not
at all
The automatic main-bea mheadlamp swilln ot
be deactivated, or they may be activated despite roa
dusers travelling in front of or
approaching the vehicle.
Thus, yo ucould cause an accident and injure
yoursel fand others. Alway sobserve traffic
conditions and ,ifnecessary, di pthe lights
manually.
X To activate: activate the Adaptiv eHigh-
bea mA ssist using the on-board computer
(Y page 120).
X Turn the light switch to 0066.
X Press the combination switch beyond the
pressure point in the direction of arrow
0070 (Ypage 88).
Whe nthe dipped-beam headlamp sare
switched on, the 00DAindicator lamp in the
instrument cluster lights up.
If yo uare driving faster than 55 km/h and
no othe rroa du sers are recognised, the
main-bea mheadlamp sare switched on
automatically. The 0063indicator lamp in
the instrument cluster also lights up.
If yo uare driving slowe rthan 45 km/h ,if
othe rroa du sers are recognise dorifthe
roads are adequatel ylit,t he main-beam
headlamp sare switched off automatically.
The 0063 indicator lamp in the instrument
cluster goe sout.T he 00DA indicator lamp
in the instrument cluster stay son.
Adaptiv econtrol of the headlamp range
adjustment starts at aspeed of approx-
imately 40 km/h.
X To deactivate: move the combination
switch back to its norma lposition.
The 00DA indicator lamp in the instrument
cluster goe sout. 90
LightsControls
207_AKB
;2;3,en-GB
mkalafa ,V ersion: 2.11.8.1
2009-07-23T10:23:49+02:00
-Seite 90

Turn signals
X
To indicate briefly: press the combination
switch briefl yinthe direction of arrow 0070
or 0072 (Ypage 88).
The corresponding tur nsigna lflashe sthree
times.
X To indicate: push the combinatio nswitch
beyond the pressure point in the direction
of arrow 0070or0072 (Ypage 88).
The corresponding tur nsigna lindicator
lamp 0024 or0026 in the instrument clus-
ter flashes.
Hazard warning lamps The hazar
dwarnin glam ps automatically
switch on if:
R an airba gisdeployed.
R yo ub rake sharpl yand bring the vehicl eto
ah altf romas peed of mor ethan
70 km/h.
The hazar dwarnin glam ps still operate if the
ignition is switched off.
X To switc hon:press button 0046.
All tur nsignals flash.
X To switc hoff:press button 0046.
X To switc hoffthe hazard warning lamps
using the combination switch: when the
hazar dwarnin glam ps ar eon, push the
combinatio nswitch in the direction of
arrow 0070or0072 beyond the pressure point
(Y page 87).
The indicator lamp on the corresponding
side of the vehicl eflashes. The hazar
dwarnin glam pswitches off auto-
maticall yafter full brake applicatio nifthe
vehicl ethenr eache saspeed of over
10 km/h again.
Intelligent Light System* (bi-xenon
headlamps*) The Intelligent Light System is
asystem which
adjusts the headlamps automaticall ytosuit
the prevailing driving and weather conditions.
The bi-xeno nheadlam ps offer enhance dfun c-
tions to improv eillum ination of the roa dsur-
face, e.g .depen ding on the vehicl espeed or
weather conditions. The system includes the
active light function, cornering light function,
motorway mod eand extende drange fog-
lamps .The system is onl yactive when it is
dark.
Yo uc an activate or deactivate the "Intelligent
Light System" using the on-board computer
(Y page 119).
Activ elight function The active light functio
nisas ystem that
moves the headlamps according to the steer-
ing movements of the front wheels .Inthis
way, relevant area sremai nillum inate dwhile
driving .Thisa llow syou to recognise pedes-
trians, cyclists and animals. Lights
91Controls
*optional
207_AKB; 2; 3, en-GB
mkalafa
,V ersion: 2.11.8.1
2009-07-23T10:23:49+02:00
-Seite 91 Z

R
when changing to alane with faster moving
traffic
R in complex driving situation sorwhere the
lanes are diverted ,e.g.atm otorway/road-
way construction sites
Otherwise, DISTRONIC PLUS maintain sthe
current speed or accelerates up to th eset
speed.
DISTRONIC PLUS cannot tak eaccount of
weather conditions .Deactivate, or do not
activate, DISTRONIC PLUS if:
R ther oads are slippery, snow-covered or icy.
The wheels could lose grip when braking or
accelerating. The vehicle could start to
skid.
R thes ensors are dirt yorthere is poor visi-
bility, e.g .due to snow, rain or fog. Distance
control may be impaired.
Always pay attention to traffic conditions
even when DISTRONIC PLUS is activated.
Otherwise, you may fail to recognise dangers
in time, cause an acciden tand injure yourself
and others.
The radar sensor system is automatically
deactivated near radio telescope facilities
(Y page 304).
If you want Distronic Plus to assist you, the
radar sensor system must be activated and
operational.
If no car is driving in front of you, Distronic
Plus work slike cruise control in th espeed
range between 30 km/h and 20 0km/ h. If a
vehicle is driving in front of you, Distronic Plus
work sint hespeed range between 0km/h
and 20 0km/ h.
Do not use Distronic Plus while driving on
roads with steep gradients. G
Risk of accident
DISTRONIC PLUS brakes your vehicle at a
maximum of 4m/s2
depending on its speed.
This correspond stoapproximately 40 %of
your vehicle's maximum brak eforce. You must also apply th
ebrakes yoursel fifthis
braking power is not sufficient.
If DISTRONIC PLUS detect sarisk of collision
with avehicle in front ,anintermittent warning
ton esounds. In addition, the 00BAdistance
warning lamp in th einstrumen tcluster lights
up. Brake to avoid acollision.
Cruise control lever With th
ecruise control lever you can operate
Distronic Plus and variable Speedtronic.
The LIM indicator lamp on th ecruise control
lever indicates which system you have selec-
ted:
R LIM indicator lamp off:
Distronic Plus is selected.
R LIM indicator lamp lit:
Variable Speedtronic is selected. 0046
To store th ecurrent speed or ahigher
speed
0047 To adjus tthe specified distance
008A LIM indicator lamp
0088 To store th ecurrent speed or call up the
last stored speed
0086 To store th ecurrent speed or alower
speed
0087 To switch between Distronic Plus and var-
iable Speedtronic
006E To deactivat eDistronic Plus 126
Drivin
gsystemsControls
207_AKB; 2; 3, en-GB
mkalafa, Version: 2.11.8.1 2009-07-23T10:23:49+02:00-Seite1 26

Air conditioning
Overview of air-conditionin
gsystems
Th ev ehicle is equipped wit hone of th efollowing air-conditionin gsystems: 2-zone THERMATIC automatic air conditioning
Fron
tcontro lunit THERMATIC 2-zone automatic climat
econ-
trol combines an automatic heating and ven-
tilation system wit hacoolings ystem. You
can control th etem perature separately for
th ed river' sand front-passenger sides. THERMOTRONIC 3-zone luxur
yautomatic climat econtrol* Fron
tcontro lunit Rear control panel THERMOTRONI
C3-zon eluxury automatic
climat econtro lcom bines an automatic heat-
ing and ventilation system wit hacoolings ys-
tem. You can control th etem perature sepa-
rately for th edriver' sand front-passenger
side sand th erear compartment. Genera
lnotes
THERMATIC 2-zone automatic climat econ-
trol/THERMOTRONI Cluxury 3-zone auto-
matic climat econtrol* controlsthe tempera-
tur ea nd th ehumidit yofthevehicl einterior
and filters out undesirable substance sfrom
th ea ir.
THERMATIC 2-zone automatic climat econ-
trol/THERMOTRONI Cluxury 3-zone auto- matic climat
econtrol* is only operational
when th eengineisr unning. 32
i Ventilat ethe vehicl efor ab riefp eriod
during warm weather ,e.g.u sin gthe con-
venience opening feature (Y page 96). This
will spee dupthecoolin gprocess and the
desired vehicl einterior temperature will be
reached mor equickly.
32 THERMOTRONI Cluxury 3-zone automati cclimat econtrol* :the "residual heat "function can only be switched
on/off if th eignition is switched off. Air conditioning
147Controls
*optio nal
207_AKB; 2; 3, en-GB
mkalafa
,V ersion: 2.11.8.1
2009-07-23T10:23:49+02:00
-Seite 147 Z

i
The integrated filter can filter out most
particles of dust and completely filters out
pollen. Aclogged filter reduces the amount
of air supplied to the vehicle interior. For
this reason, you should alway sobserve the
interval for replacing the filter, which is
specified in the Servic eBooklet .Asit
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Servic eBooklet. G
Risk of accident
Observe the settings recommended on the
following pages. Otherwise, the windows
could mist up. This may obstruct your view of
the traffic situation and, as aresult, you may
cause an accident. Overview of air-conditioning system functions
Thermatic 2-zone automatic climate control Function
0046
Activates/deactivates air-recircu-
lation mode
0047
Demist
sthe windscreen 008A
Switches the zonef
unction on/off0088
Display
0086
Sets the air-conditioning system to
automatic
0087
Switches cooling with air dehumid-
ification on/off
006E
Switches the rear window heating
on/off
006F
Switches the air conditioning on/
off
0070
Sets the temperature, right Function
0071
Sets the air distribution
0072
Sets the airflow
0073
Sets the temperature, left
i
Instruction sand recommendations for
optimum air conditioning:
R activat ethe air conditioning using
the 005A and005C buttons. The indica-
tor lamps above the 005Aand005C but-
tonsc ome on.
R set the temperature to 22 †.
R only use the "demisting" function briefly,
until the windscreen is clear again.
R only use the "air-recirculation" mode
briefly, e.g. if there are unpleasant out-
side odours or when in atunnel. Other- 148
Air conditioningControls
207_AKB; 2; 3, en-GB
mkalafa,
Version: 2.11.8.1 2009-07-23T10:23:49+02:00-Seite 148

wise, th
ewindows could mist up due to
al ack of fresh air.
R use th e"ZONE "function to adopt the
temperature settings on th edriver's side for th
efront-passenger side as well. The
indicator lamp above the 00D8button
goes out.
Thermotronic luxury 3-zone automatic climate control* Function
Front control unit
0046
Set
sthe air-conditioning system to
automatic 0047
Demist
sthe windscreen 008A
Switche
sthe zone function on/off 0088
Display
0086
Activates/deactivates air-recircu-
latio
nmode 0087
Switche
sthe residual heat function
on/off 006E
Switche
scooling with air dehumid-
ificatio non/off Function
006F
Switche
sthe rear windo wheating
on/off 0070
Switche
sthe air conditioning on/
off 0071
Set
sthe temperature, right 0072
Controls th
eair conditioning auto-
matically (FOCUS/MEDIUM/DIF-
FUSE) 33 0073
Set
sthe airflow 0074
Set
sthe air distribution 0075
Set
sthe temperature, left Rea
rcontrol panel 33
Pres sthe 005A button. The air conditioning is set to automatic mode .You can also set th eairflow and air
distribution of th eautomatic air conditioning to one of three level s(FOCUS/MEDIUM/DIFFUSE )usin gb utton
0072. Air conditioning
149Controls
*optional
207_AKB; 2; 3, en-GB
mkalafa,
Version:2.11.8.1
2009-07-23T10:23:49+02:00
-Seite1 49 Z

Function
0076
Increases th
etem perature 0077
Display
0078
Reduces th
etem perature i
Instructions and recommendation sfor
optimum air conditioning:
R activat ethe air conditioning using
the 005A and005C buttons .The indica-
to rlamps abov ethe 005A and005C but-
tons come on .You can also set th eair-
flo wa nd air distribution of th eautomatic
air conditioning to on eofthree levels
(FOCUS/MEDIUM/DIFFUSE). You can
set th edesired leve lusin gbutton 0072.The
MEDIUM leve lisrecommended.
R set th etem perature to 22 †.
R only use th e"demisting "function briefly,
until th ewindscree nisclear again.
R only use th e"air-recirculation "mode
briefly, e.g. if there are unpleasan tout-
side odour sorwhen in atunnel. Other-
wise, th ewindows could mis tupdue to
al ack of fresh air.
R use th e"ZONE "function to adopt the
temperature settings on th edriver' sside
for th efront-pa ssenger side and th erear
compartmen taswell. The indicator lamp
abov ethe 00D8 buttongoes out.
R use th e"residual heat "function if you
want to heat or ventilate th evehicle inte-
rior when th eignition is switched off .The
"residual heat "function can only be acti-
vated or deactivate dwitht he ignition
switched off. Switching th
eair conditioning on/off
i When th eair conditioning is switched off,
th ea ir supply and air circulation are also switched off
.Onlys elect this settin gbriefly,
otherwise th ewindows may mis tup.
i Activate th eair conditioning primarily
usin gthe 005A button(Ypage 151).
X Turn th ekeyto position 2in th eignition
lock.
X To activate: press the005Abutton.
The indicator lamp abov ethe 005A button
light sup. Airflo wand air distribution are set
to automatic mode.
or
X Press the 0061button.
The indicator lamp abov ethe 0061 button
goes out .The previously selected settings
come int oeffect again.
X To switch off: press the0061button.
The indicator lamp abov ethe 0061 button
light sup. Switching cooling with air dehumidi-
ficatio
non/off
The "coolin gwitha ir dehumidification "func-
tio niso nlya vailable when th eengineisr un-
ning. The air inside th evehicle is cooled and
dehumidified according to th etem perature
selected. G
Ris
kofa ccident
If th e"coolin gwitha ir dehumidification "func-
tio nisd eactivated, th eair inside th evehicle
will no tbecooled (during warm weather )or
dehumidified. The windows could mis tup
mor equickly. This may preven tyou from
observing th etraffic conditions, thereby caus-
ing an accident.
Condensation may drip from th eunderside of
th ev ehicle when Thermatic is in cooling
mode. 150
Air conditioningControls
207_AKB
;2;3,en-GB
mkalafa ,V ersion: 2.11.8.1
2009-07-23T10:23:49+02:00
-Seite 150