
Switching on/of
f........................... 117
Switching residual hea ton/off ......122
Switching the rear window heat-
ing on/off ...................................... 120
Switching the ZONE function on/
off .................................................. 119
THERMOTRONIC (2-zone) auto-
matic climate control .....................116
Cockpit
Overview .......................................... 26
see Instrument cluster
Collapsible emergency spare
wheel
see Emergency spare wheel
COMAND Online
see separate operating instructions
Combination switch ..........................103
Constant headlamp mode see Daytime driving lamps
Consumption statistics (on-board
computer) .......................................... 183
Convenience closing feature ..............77
Convenience opening/closing (air-
recirculation mode) ........................... 121
Convenience opening feature see Side windows
Coolan t(engine)
Checkin gthe level ......................... 251
Display message ............................ 211
Notes ............................................. 308
Temperature (on-board computer) .195
Temperature gauge ........................ 178
Warning lamp ................................. 231
Cooling
see Climate control
Cornering light function
Function/notes ............................. 104
Cornering light function (display
message) ............................................ 208
Crash-responsive emergency light-
ing ....................................................... 106
Cruise control Cruise control leve r....................... 151
Deactivating ................................... 153
Display message ............................ 217
Driving system ............................... 151
Important safety notes ..................151LIM indicator lamp
.........................151
Selecting ........................................ 152
Setting aspeed .............................. 153
Storing and maintaining current
speed ............................................. 152
Cup holder ......................................... 239 D
Dashboard see Cockpit
Data
see Technical data
Daytime driving lights
Display message ............................ 210
Switching on/off (on-board com-
puter) ............................................. 191
Switching on/off (switch) ..............101
Dealership
see Qualified specialist workshop
Delaye dswitch-off
Exterio rlighting (on-board com-
puter )............................................. 192
Interior lighting .............................. 193
Diagnostics connection ......................22
Diesel ................................................. .305
Diesel particle filter ..........................148
Digital speedometer .........................184
Dipped-beam headlamps Changing bulbs .............................. 108
Display message ............................ 208
Setting for driving abroad (sym-
metrical) ........................................ 100
Setting for driving on the right/
left ................................................. 192
Switching on/off ........................... 101
Display (cleaning instructions) ........257
Display message General information .......................199
Hiding (on-board computer) ...........199
KEYLESS-GO .................................. 222
Display messages
ASSYST PLUS service interval dis-
play................................................ 252
Calling up (on-board computer) .....199
Driving systems ............................. 213
Engine ............................................ 211
Key ................................................ 222 Index
7 

Useful information
i This Owner's Manual describes all models
and all standard and optional equipment
available to your vehicle at the time of pub-
lication of the Owner's Manual. Country-
specific deviations are possible. Please
note that your vehicle may not be equipped
with all features described. This also
applies to safety-relevan tsystems and
functions.
i Please read the information on qualified
specialist workshops (Y page 22).Overview of climate control systems
Important safety notes
G
WARNING
Observe the settings recommended on the
following pages. Otherwise, th ewindows
could mist up. This may obstruct your view of
the traffic situation and, as a result, you may
cause an accident.
The air-conditioning system/
THERMOTRONIC automatic climate control
controls the temperature and the humidity of
the vehicle interior and filters undesirable
substances fro mthe air.
The air-conditioning system/
THERMOTRONIC automatic climate control is
only operational when the engine is run-
ning. 8
The function only works optimally when
the side windows and the roof are closed.
i Ventilate the vehicle for a brief period
during warm weather. This will speed up the
cooling process and the desired vehicle
interior temperature will be reached more
quickly.
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 always observe the
interval for replacing the filter, which is
specified in the Service Booklet
.As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Service Booklet.
8 The residual heat function can only be activated/deactivated when the ignition is switched off. 114
Overview of climate control systemsClimate control 

Permanent SPEEDTRONIC
You can use the on-board computer to limit
the speed permanently to avalue between
160 km/h(e.g. for driving on winter tyres) and
the maximum speed ( Ypage 193).
Shortly before the store dspeed is reached, it
appears in the multifunction display.
Permanent SPEEDTRONIC remains active,
even if variable SPEEDTRONIC is deactivated.
You cannot exceed the stored limit speed,
even if you depress the accelerator pedal
beyond the pressure point (kickdown). DISTRONIC PLUS
Important safety notes DISTRONIC PLUS regulates the speed and
automatically helps you maintain the dis-
tance to the vehicle detected in front. DIS-
TRONIC PLUS brakes automatically so that
the set speed is not exceeded.
On long and steep downhill gradients, espe-
cially if the vehicle is laden, you must select
shift range
1,2or 3in good time. By doing
so, you will make use of the braking effec tof
the engine .This relieves the load on the brake
system and prevents the brakes from over-
heating and wearing too quickly.
If DISTRONIC PLUS detects a slower-moving
vehicle in front, your vehicle is braked in order
to maintain the preset distance to the vehicle
in front. G
WARNING
Do not change down for additional engine
braking on a slippery road surface. This could
cause the drive wheels to lose their grip and
the vehicle could skid. G
WARNING
DISTRONIC PLUS is only an aid designed to
assist driving. The driver remains fully respon-
sible for the vehicle's distance from other
vehicles, the vehicle's speed and for braking
in good time. DISTRONIC PLUS does not react in particular
to:
R
pedestrians
R stationary obstacles on the road, e.g. stop-
ped or parked vehicles
R oncoming and crossing traffic
DISTRONIC PLUS may not detect narrow vehi-
cles driving in front,e .g. motorcycles, or vehi-
cles driving on a different line. Therefore,
always pay attention to traffic conditions even
when DISTRONIC PLUS is activated. Other-
wise, you may fail to recognise dangers in
time, cause an accident and injure yourself
and others. G
WARNING
DISTRONIC PLUS cannot take account of road
and traffic conditions. If DISTRONIC doe snot
recognise or no longer recognises the vehicle
in front, do not activate DISTRONIC or, if it is
already active, deactivate it. This is especially
the case:
R before corners
R on filter lanes
R when changing to a lane with faster moving
traffic
R in complex driving situations or where lanes
are diverted, e.g. at roadworks on a motor-
way
DISTRONIC PLUS otherwise maintains the
current speed set by you or accelerates up to
the set speed.
DISTRONIC PLUS cannot take account of
weather conditions. Deactivate, or do not
activate, DISTRONIC PLUS:
R if the roads are slippery, snow-covered or
icy. The wheels could lose their grip when
braking or accelerating. The vehicle could
start to skid.
R if the sensors are dirty or there is poor vis-
ibility, e.g. due to snow, rain or fog. Dis-
tance control may be impaired.
Always pay attention to traffic conditions
even when DISTRONIC PLUS is activated. 156
Driving systemsDriving and parking