X
Press the :or9 button to select the
Acoustic Lock function.
If the Acoustic Lock function is activated,
the & symbol in the multifunction dis-
play lights up red.
X Press the abutton to save the setting.
Activating/deactivating the radar sensor
system
i You must deactivate the radar sensor sys-
tem in certain countries and near radio
telescope facilities. For further informa-
tion, see (Y page 345).
Vehicles with anavigation system: the radar
sensor system is deactivated automatically if
you are close to radio telescope facilities.
The following systems are switched off when
the radar sensor system is deactivated:
R DISTRONIC PLUS (Y page 171)
R BAS PLUS (Y page 62)
R PRE-SAFE ®
Brake (Y page 66)
R Blind Spot Assist (Y page 196)
R Active Blind Spot Assist (Y page 199)
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Vehicle submenu.
X Press the abutton to confirm.
X Press the 9or: button to select
Radar sensor (See Owner's Man.): .
You will see the selected setting: on or
off .
X Press the abutton to save the setting.
Heating menu Auxiliary heating departuret
ime
This function is only availabl eonvehicles with
auxiliary heating (Y page 137).
In the Heating submenu, you can select a
stored departure time or change adeparture
time. The auxiliary heating timer function calcu-
lates the switch-on time accordin
gtothe out-
side temperature so that the vehicle is pre-
heated by the departure time. When the
departure time is reached, the auxiliary heat-
ing continues to heat for afurther five
minutes and then switches off. The auxiliary
heating adopts the THERMATIC or
THERMOTRONIC temperature setting.
You can switch off the auxiliary heating by
using the remot econtrol or the auxiliary heat-
ing button on the centre console. G
WARNING
Exhaust fumes are produced when the auxili-
ary heating is in operation. Inhaling these
exhaust fumes can be poisonous. You should
therefore switch off the auxiliary heating in
confined spaces without an extraction sys-
tem, e.g. agarage. G
WARNING
When operating the auxiliary heating parts of
the vehicle can get very hot. Make sure that
the exhaust system does not under any cir-
cumstances come into contact with easily
ignitable material such as dry grass or fuels.
The material could otherwise ignite and set
the vehicle alight. Choose your parking spot
accordingly.
Operating the auxiliary heating is thus pro-
hibited at filling station sorwhen your vehicle
is being refuelled. You must therefore switch
off the auxiliary heating at filling stations.
! Operating the auxiliary heating/ventila-
tion draws on the vehicle battery. After you
have heated or ventilated the vehicle a
maximum of two times, drive for alonger
distance.
i Switc hthe auxiliary heating on regularly
once amonthfor about 10 minutes. Menus and submenus
229On-board computer and displays Z
Display messages Possible causes/consequences and
M Solutions
PRE-SAFE
Functions cur‐
rently limited See
Owner'
sManual G
Risk of accident
PRE-SAFE ®
Brake is temporarily inoperative if:
R theD ISTR ONIC PLU Scover in th eradiato rgrille is dirty.
R thes ensor sinthebumpers are dirty.
R itsf unction is impaire ddue to heav yrain or snow.
R ther ada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tion soro ther sources of electromagnetic radiation.
R the system is outside the operatin gtemperature range.
R the on-board voltage is too low.
PRE-SAFE ®
Brak eiso perational again and the display message
disappears if:
R the dirt (e.g. slush) drops away while the vehicle is in motion.
R the system detects that the sensor sare fully available again.
R the system is within the operatin gtemperature range.
If the display message continues to be displayed:
X Clean the DISTRONIC PLUS cover in the radiator grille
(Y page 290).
X Clean the bumpers (Y page 290).
X Restart the engine.
X Wait until the batter yissufficiently charged. PRE-SAFE
Functions limited
See Owner's Manual G
Risk of accident
PRE-SAFE ®
Brak eisf aulty. BASP LUS or the distance warning sig-
nal may also have failed.
X Visit aqualified specialist workshop. A
Malfunction Con‐
sult workshop G
Risk of injury
Cabriolet: the roll bars are defective.
X Visit aqualified specialist workshop immediately. ü If the symbola
ppears in the multifunction display,as eat belt
tongue has been clipped intoar ear seat belt buckle.
For further information on the status indicator for the rear seat
belts: (Y page 49). 236
Display messagesOn-boar
dcomputer and displays
Display messages Possible causes/consequences and
M Solutions
Radar sensor
deactivated autom.
See Owner'
sManual Vehicles wit
hanavigation system: th evehicl eisc lose to aradio
telescope facilit yand is therefore prohibite dfromt ransmitting any
rada rsignals .The radar sensor system has switched off automat-
ically (Y page 345).
DISTRONIC PLUS (Y page 171) is deactivated automatically if it is
activated. Awarning tone also sounds.
Blin dSpotA ssist (Y page 196) or Active Blind Spot Assist
(Y page 199) is deactivated automaticallyifitisa ctivated. The
yellow 9indicator lamps also light up in the exterior mirrors.
BAS PLUS (Brake Assist PLUS) (Y page 62) and PRE-SAFE®
Brake
(Y page 66) are also not available.
X Drive on.
Once you have moved far enough awayf rom the radio telescope,
the above functionsa re available again.Radar sensor
deactivated See
Owner's Manual The radar sensor system is deactivated.
X
Check whether or not the radar sensor system may be activated
(Y page 345).
X Switch on the radar sensor system (Y page 229).Lane Keeping
Assist currently
unavailable See
Owner's Manual or
Active Lane Keep‐ ing Assist cur‐
rently unavailable
See Owner's Manual Lane Keeping Assist or Active Lane Keeping Assist is deactivated
and temporarily inoperative if:
R the windscreen is dirty in the camera's field of vision.
R visibility is impaired due to heavy rain, snow or fog.
R there are no lane markings for alonger period.
R the lane markings are worn, dark or covered, for example by dirt
or snow.
Lane Keeping Assist or Active Lane Keeping Assist is operational
againa nd the display message disappears if:
R the dirt (e.g. slush) drops away whil ethe vehicl eisinmotion.
R the system detects tha tthe camera is fully operational again.
If the displaym essage continues to be displayed:
X Cleant he windscreen. Lane Keeping
Assist inoperative
or
Active Lane Keeping Assist
inoperative Lane Keeping Assist or Active Lane Keeping Assist is faulty.
X
Visit aqualified specialist workshop. Display messages
245On-board computer and displays Z
Display messages Possible causes/consequences and
M Solutions
Blind Spo
tAssist currently unavail‐
abl
eS ee Owner's Manual or
Active Blind Spo
tAssist currently unavail‐
abl
eS ee Owner's Manual Blind Spot Assis
torActive Blind Spot Assist is temporaril yinop-
erative if:
R yo uh avee stablished the electrical connection between the
traile rand your vehicle.
R the sensors ar edirty.
R its functio nisimpaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
The yellow 9indicator lamps also light up in the exterior mir-
rors.
Blind Spot Assist or Active Blind Spot Assist is operational again
and the displaym essage disappears if:
R the dirt (e.g. slush) drops awayw hile the vehicle is in motion.
R the system detects that the sensors are fully available again.
R the radar sensor system is back within the operating tempera-
ture range.
If the displaym essage continues to be displayed:
X Cleant he sensors (Y page 290).
X Restart the engine. Blind Spot Assist
inoperative or
Active Blind Spot Assist inoperative Blind Spot Assist or Active Blind Spot Assist is faulty.
The yellow
9indicator lamps also light up in the exterior mir-
rors.
X Visit aqualified specialist workshop. Parking Guidance
inoperative Parking Guidance is malfunctionin
g(Ypage 189).
X Restart the engine.
If the displaym essage continues to be displayed:
X Visit aqualified specialist workshop. 246
Display messagesOn-board computer and displays
Display messages Possible causes/consequences and
M Solutions
DISTRONIC PLUS
currently unavail‐
abl
eS ee Owner's Manual DISTRONIC PLU
Sisdeactivated and is temporarily inoperative if:
R the DISTRONIC PLUS cover in the radiator grille is dirty.
R the sensors in the bumpers are dirty.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R its function is impaired due to heavy rain or snow.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
Aw arning tone also sounds.
DISTRONI CPLUSiso perational againa nd the display message
disappears if:
R the dirt (e.g. slush) drops away whil ethe vehicl eisinmotion.
R the system detects tha tthe sensors are fully available again.
R the system is within the operating temperature range.
If the displaym essage continues to be displayed:
X Cleant he DISTRONIC PLUS cover in the radiator grille
(Y page 290).
X Cleant he bumpers (Y page 290).
X Restart the engine. DISTRONIC PLUS
inoperative DISTRONIC PLUS is faulty. BAS PLUS and PRE-SAFE
®
Brake may
also have failed.
Aw arning tone also sounds.
X Visi taq ualified specialist workshop. DISTRONIC PLUS
suspended You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
X
Take your foot off the accelerator pedal. DISTRONIC PLUS
--- km/h An activation condition for DISTRONIC PLUS is not fulfilled.
X
Check the activation condition sfor DISTRONIC PLUS
(Y page 171). DISTRONIC PLUS and
SPEEDTRONIC
inoperative DISTRONIC PLUS and SPEEDTRONIC are faulty.
Awarning tone
also sounds.
X Visit aqualified specialist workshop. Cruise control and
SPEEDTRONIC
inoperative Cruise contro
land SPEEDTRONIC are malfunctioning.
Aw arning tone also sounds.
X Visi taq ualified specialist workshop. 248
Display messagesOn-boar
dcomputer and displays
Display messages Possible causes/consequences and
M Solutions
The KEYLESS-GO ke
yisnot detecte dwhile the engin eisrunning
because ther eisinterference from astrong source of radio waves.
Aw arning tone also sounds.
X Pull ove rand stop the vehicl esafelyass oonasp ossible,p aying
attention to road and traffic conditions.
X Apply the parking brake.
X Operate the vehicle with the key in the ignition lock if necessary. +
Key not detected
(White displaym
es-
sage) The KEYLESS-GO key cannot be detected at present.
X
Change the location of the key with the KEYLESS-GO functions
in the vehicle.
If the KEYLESS-GO key is still not detected:
X Change the location of the key with the KEYLESS-GO functions
in the vehicle.
X Operate the vehicle with the key in the ignition lock if necessary. +
Key still in vehi‐
cle The KEYLESS-GO key has been detected inside the vehicle during
locking.
X
Remove the KEYLESS-GO key from the vehicle. +
Remove starting
button, then
insert key KEYLESS-GO is temporarily malfunctioning or is defective.
Awarn-
ing tone also sounds.
X Inser tthe keyintot he ignition loc kand tur nittot hedesired
position.
X Visi taq ualified specialist workshop. +
Close doors to
lock vehicle At least one door is open.
Awarning tone also sounds.
X Close all door sand loc kthe vehicle again. 254
Display messagesOn-board computer and displays
Socket in the glove compartment
X
Open the glove compartment
(Y page 265).
X Lift up the cover of socket :.
Socket in the front-compartment centre
console X
To open: slide cover :forwards until it
engages.
X Lift up the cover of socket ;.
X To close: press cover :briefly at the
front.
The cover moves back.
Socket in the rear-compartment centre
console As
ocket is fitted in the centre console in the
rear compartment in vehicles with an ashtray
and acigarett elighter. X
Pull cover ;out by its top edge.
X Lift up the cover of socket :. Mobile phone
Important notes G
WARNING
Observe the legal requirements of the country
in which you are currently driving regarding
operating mobile communications equipment
in av ehicle.
If it is permitted by law to operate communi-
cations equipment while the vehicle is in
motion ,you must only do so if the traffic sit-
uation permits. Otherwise, you could be dis-
tracted from the traffic conditions, cause an
accident and injure yourself and others.
Two-way radios and fax equipment used with-
out low-reflection exterior aerials can inter-
fere with the vehicle's electronics and thereby
jeopardise the operating safety of the vehicle
and your safety. Therefore, you must only use
this equipment if it is correctly connected to
as eparate reflection-free exterior aerial. G
WARNING
Excessive levels of electromagnetic radiation
may cause damage to your health and the
health of others. Using an exterior aerial takes
into account current scientific discussions
relating to the possible health risk posed by
electromagnetic fields. Features
273Stowing and features Z
Frequencies for th
egarage door opener The radio typ
eapproval number and th efrequency range for th egarag edoor opener can be
foun dont heInternet at: http://www.mercedes-benz.de/betriebsanleitung. Floorma
tonthedriver's side G
WARNING
Mak esure that there is sufficien tclearance
around the pedals when floormats are used,
and that the floormats are properly secured.
The floormats must be correctly secured at all
times using retainer sand press-studs.
Before you drive off ,chec kthe floormats and
secure if necessary. Afloormat which is not
properly secured can slip and, thereby, inter-
fere with the movemen tofthe pedals.
Do not place floormats on top of one another. X
Slide the seat backwards.
X To fit: place the floormat in the footwell.
X Press studs :onto retainers ;.
X To remove: pull the floormat off retain-
ers ;.
X Remove the floormat. Retrofitted anti-glaref
ilm
Anti-glare film retrofitted to the inside of the
windows can interferew ith radio/mobile
phone reception. This is particularly the case
for conductive or metallic-coated films. Infor-
mation about anti-glare film can be obtained
from any Mercedes-Ben zService Centre. 278
FeaturesStowing and features