
The braking effect of the HOLD function is
cancelled and the vehicle could roll away if:
R the HOLD function is deactivated by
depressing the accelerator pedal or the
brake pedal.
R there is amalfunction in the system or an
interruption in the power supply, e.g. bat-
tery failure.
R the electrical system in the engine com-
partment, the battery or the fuses are tam-
pered with.
R the battery is disconnected.
If you leave the vehicle or park it, deactivate
the HOLD function and secure the vehicle
against rolling away.
You will see awarning message in the multi-
function display if the HOLD function is acti-
vated and:
R the driver's door is open and the driver's
seat belt is unfastened.
R the engine is switched off, unless it is auto-
matically switched off by the ECO start/
stop function.
R the bonnet is opened.
For vehicles with manual transmission:
Brake immediately X
Immediately depress the brake pedal firmly
until the warning message in the multifunc-
tion display goes out. This deactivates the
HOLD function.
On vehicles with automatic transmission:
Select Park (P) X
Move the selector lever to Pto prevent the
vehicle from rolling away.
The HOLD function is deactivated. The
warning message in the multifunction dis-
play disappears.
Ah orn will also sound at regular intervals if
the HOLD function is activated and you:
R switch the engine off, open the driver's
door and take off your seat belt
R open the bonnet The sounding of the horn alerts you to the fact
that the vehicle has been parked while the
HOLD function is still activated. The tone
becomes louder if you attempt to lock the
vehicle. The vehicle is not locked until the
HOLD function is deactivated.
i If the engine has been switched off, it
cannot be started again until the HOLD
function has been deactivated.
If there is afault in the system or power supply
while the HOLD function is activated, the
Brake immediately message is shown in
the multifunction display .Immediately
depress the brake firmly until the warning
message in the multifunction display goes
out.
On vehicles with automatic transmission, you
can alsos hift into position P.This deactivates
the HOLD function. PARKTRONIC
Important safety notes G
WARNING
PARKTRONIC is only an aid and may not
detect all obstacles. It is not asubstitute for
attentive driving.
You are always responsible for safety and
must continue to pay attention to your imme-
diate surroundings when parking and
manoeuvring. You could otherwise endanger
yourself and others. G
WARNING
Make sure that no persons or animals are in
the manoeuvring range. Otherwise, they
could be injured.
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates visuallya nd
audibly the distance between your vehicle
and an object. Driving systems
185Driving and parking Z

the minimum
,the distance ma ynolongerbe
shown.
Warning displays The warning displays show the distance
between the sensors and the obstacle. The
warning displayf or the front area is located
on the dashboard above the centre air vents.
The warning displayf or the rear area in the
Coupéisl ocated on the roof lining in the rear
compartment;int he Cabriolet, it is between
the rear seats. Warning displayf
or the front area
: Segmentsont he left-hand side of the
vehicle
; Segmentsont he right-hand side of the
vehicle
= Segmentss howing operational readiness
The warning displayf or each side of the vehi-
cle is divided into five yellow and two red seg-
ments. PARKTRONIC is operational if yellow
segments showing operational readiness =
light up.
The gear lever position or the transmission
position of the automatic transmission deter-
mines which warning displayisa ctive when
the engine is running. Manual transmission: Gear lever posi-
tion Warning display
Forwards gear
or
Neutral
Front area activated
Reverse gear
Rear and front areas
activated
Automatic transmission:
Transmission
position Warning display
D
Front area activated
R
or N Rear and front areas
activated
P
No areas activated
One or more segments light up as the vehicle
approaches an obstacle, depending on the
vehicle's distance from the obstacle.
From the:
R
sixth segment onwards, you will hear an
intermittent warning tone for approx-
imately two seconds.
R seventh segment onwards, you will hear a
warning tone for approximately two sec-
onds. This indicates that you have now
reached the minimum distance. Driving systems
187Driving and parking Z

still detects typical indicators of fatigue or
increasing lapses in concentration, you will be
warned againa fter 15 minutes at the earliest.
ATTENTION ASSIST is reset whe nyou con-
tinue you rjourney and it startsa ssessing your
tiredness again if:
R you switch off the engine.
R you take off your seat belt and open the
driver's door, e.g. for achange of drivers or
to take abreak. Speed Limit Assist
Important safety notes i
Speed Limit Assist is not operational in all
countries.
Speed Limit Assist shows you detected speed
limits in the multifunction display .Data from
th en avigation system is also used for this
purpose. The display appear sifatraffic sign
indicating aspee dlimit or th eend ofas peed
limit is detected. If Speed Limit Assist does
no td etec tany traffic signs, the speed limit
from the digital roa dmap is take nand shown
in the display.
Speed Limit Assist detects the traffic signs
with acamera at the top of the windscreen. :
Speed Limit Assist camera G
WARNING
Speed Limit Assist is only an aid and may
detect speed limit signs incorrectly or not at
all. The system may be impaired or may not func-
tion if:
R
there is poor visibility, e.g. due to snow,
rain, fog or spray.
R there is glare, e.g. from the sun or from
oncoming traffic.
R the windscreen is dirty, misted up or cov-
ered, for instance by asticker, in the vicinity
of the camera.
R the traffic signs are covered, for instance
by dirt, snow or trees.
R the traffic signs are poorly illuminated.
R there are ambiguous traffic signs, for
instance near roadworks or on multi-lane
roads.
Traffic signs always have priority over the
Speed Limit Assist display. Speed Limit Assist
cannot detect road and traffic conditions. It is
not asubstitute for attentive driving.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourselfa nd others.
Information in the multifunctio ndisplay Example
:vehicles with automatic transmission
: Traffic sign indicatin gaspeed limit or the
end of aspeed limit
; Speed Limit Assist is available and the
warning function is switched on in the on-
board computer
= Unit sused in the traffic sign displayed Driving systems
195Driving and parking Z

Selecting the departuret
ime or deactivat-
ing aselected departuret ime
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Heating submenu.
X Press the abutton to confirm.
You will see the selected setting.
X Press the abutton to confirm.
X Press the :or9 button to select
one of the three departure times or Timeroff (no timer active).
X Press the abutton to confirm.
When adeparture time is selected, the yel-
low indicator lamp lights up on the auxiliary
heating button.
Changing the departuret ime
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Heating submenu.
X Press the abutton to confirm.
You will see the selected setting.
X Press the abutton to confirm.
X Press the :or9 button to select
Change A ,
B or
C .
X Press the abutton to confirm.
You can now change the departure time.
X Press the =or; button to select the
display to be changed: hours, minutes.
X Press the :or9 button to set the
selected display.
X Press the abutton to store the entry.
The yellowi ndicator lamp on the auxiliary
heating button lights up.
Convenience Activating/deactivating the EASY-
ENTRY/EXIT feature
You can use the Easy Entry/Exit: function
to activate or deactivate the EASYE NTRY/
EXIT feature (Y page 108). G
WARNING
The steering wheel moves when the EASY-
ENTRY/EXIT feature is active. There is arisk
of occupants becoming trapped. Before acti-
vating the EASY-ENTRY/EXIT feature, make
sure that nobody can become trapped.
Do not leave children unsupervised in the
vehicle, even if they are secured in achild
restraint system. The children could open the
driver's door and thereby unintentionally acti-
vate the EASY-ENTRY/EXIT feature and
become trapped.
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Convenience submenu.
X Press the abutton to confirm.
X Press the :or9 button to select the
Easy Entry/Exit function.
If the Easy Entry/Exit function is activa-
ted, the vehicle steering wheel is displayed
in red in the multifunction display.
X Press the abutton to save the setting.
Switching the belt adjustment on/off
For further information on belt adjustment,
see (Y page 49).
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Convenience submenu.
X Press the abutton to confirm.
X Press the :or9 button to select the
Belt adjustment function.
When the Belt adjustment function is
activated, the vehicle seat belt is displayed
in red in the multifunction display.
X Press the abutton to save the setting.
Switching the Fold in mirrors when lock-
ing function on/off
If you switch on the Auto. fold in function,
the exterior mirrors fold in when you lock the
vehicle. When you unlock the vehicle and then 230
Menus and submenusOn-board computer and displays

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
ý G
Risk of injury
If th esymbol appears in th emultifunction display, aseat belt
tongue has not been clipped intoar ear seat belt buckle.
X If necessary, ask the occupants in the rear to fasten their seat
belts.
For further information on the status indicator for the rear seat
belts: (Y page 49). Child seat in
wrong position
See Owner's Manual G
Risk of injury
Vehicles with automatic child seat recognition on the front-
passenger seat: the child seat is positioned incorrectly.
X Fit the child seat in the correct position. G
Risk of injury
Vehicles with automatic child seat recognition on the front-
passenger seat: the automatic child seat recognition sensor is
faulty.
X Visit aqualified specialist workshop. 6
Restraint
sys. mal‐
functio
nConsult workshop G
Risk of injury
There is amalfunction in the SRS (Supplemental Restraint Sys-
tem). The 6warning lamp also lights up in the instrument clus-
ter.
X Visit aqualified specialist workshop. 6
Front
left malfunc‐
tion Consult work‐
shop or
Front right malfunction
Consult workshop G
Risk of injury
SRS has malfunctioned at the fron tonthe left or right. The 6
warning lamp also lights up in the instrument cluster.
X Visit aqualified specialist workshop. Display messages
237On-boardcomputer and displays Z

Vehicle
Display messages Possible causes/consequences and
M Solutions
To start engine,
shift to either P
or N Yo
uh avea ttempte dtostart the engine with the transmission in
position Ror D.
X Shift the transmission to position Por N. P
Select Par
k(P) Yo
uh aves witched off the engine with the Start/Sto pbutton and
opene dthe driver' sdoor.
Yo uw anted to lock the vehicle.
Aw arning tone also sounds.
or
You have switched off th eenginew itht he Start/Sto pbutto nand
opene dthe driver's door with the transmission in position N.
X Shift the transmission to position P. While the HOLD functio
norDISTRONIC PLUS is active, you have:
R opened the driver's door and released the seat belt or
R switched off the engine or
R opened the bonnet
At one may also sound at regular intervals. The toneb ecomes
louder if you attempt to lock the vehicle.
You cannot start the engine.
X Shift the transmission to position P.
You can restart the engine. N The boot lid is open.
X
Close the boot lid. M G
Risk of accident
The bonnet is open. Awarning 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 Close the bonnet.
If the active bonnet (pedestrian protection) has been triggered:
X Reset the bonnet (Y page 280).
X Close the bonnet. Active bonnet
malfunction See
Owner's Manual The active bonnet (pedestrian protection) is not active due to a
malfunction.
X
Visit aqualified specialist workshop. 250
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
C At leas
tone door is open. Awarning tone also sounds.
X Close all doors. _
Rea
rl efts eat backrest not locked
or
Rea rr ight seat backrest not locked G
Ris
kofi njury
The backres tinthe rear is not engaged on the left-hand and/or
right-hand side. Awarning tone also sounds.
X Push th ebackres tback until it engages. _
Front lef
tseat backrest not locked
or
Front right sea
tb ackrest not locked The driver'
sorfront-pa ssenger seat backres tisnot engaged. A
warning tone also sounds.
X Push the backrest back until it engages. j
Check trailer
hitch lock G
Risk of accident
The trailer tow hitch is not correctly engaged.
Aw arning tone also sounds.
X Stop th evehicle immediately, payin gattentio ntoroad and traf-
fic conditions, and switch off the engine.
X Apply the parking brake.
X Allow the trailer tow hitch ball coupling to engage in the end
position (Y page 206). J
Close boot separa‐
tor The boot separator is open.
X
Close the boot separator (Y page 92).D
Power
steering mal‐
function See Own‐
er's Manual G
Risk of accident
The power steerin gassistance is faulty.
You will need to use more force to steer.
Aw arning tone also sounds.
X Chec kwhether you are able to apply the extraf orce required.
X If you are able to steer safely: carefully drive on toaqualified
specialist workshop.
X If you are unable to steer safely: do not drive on. Contact the
nearest qualified specialist workshop. Display messages
251On-board computer and displays Z