The braking effect of the HOLD function is
canceled 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 a malfunction in the system or an
interruption in the power supply, e.g.
battery failure.
R the electrical system in the engine
compartment, the battery or the fuses are
tampered 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.
General notes The HOLD function can assist the driver in the
following situations:
R when pulling away, especially on steep
slopes
R when maneuvering on steep slopes
R when waiting in traffic
The vehicle is kept stationary without the
driver having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
Activation conditions You can activate the HOLD function if:
R
the vehicle is stationary.
R the engine is running or if it has been
automatically switched off by the ECO
start/stop function.
R the driver's door is closed or your seat belt
is fastened.
R the hood is closed.
R the electric parking brake is released.
R the selector lever is in position D,Ror Non
vehicles with automatic transmission.
R DISTRONIC PLUS is deactivated. Activating the HOLD function
X
Make sure that the activation conditions
are met.
X Depress the brake pedal.
X Quickly depress the brake pedal further
until 0003HOLD appears in the multifunction
display.
The HOLD function is activated. You can
release the brake pedal.
i If depressing the brake pedal the first
time does not activate the HOLD function,
wait briefly and then try again.
Deactivating the HOLD function The HOLD function is deactivated
automatically if:
R
you accelerate. On vehicles with automatic
transmission: only when the transmission
is in position Dor R.
R you shift the transmission to position Pon
vehicles with automatic transmission.
R you apply the brakes again with a certain
amount of pressure until HOLD disappears
from the multifunction display.
R you secure the vehicle using the electric
parking brake.
R you activate DISTRONIC PLUS.
i After a time, the electric parking brake
secures the vehicle and relieves the service
brake. Driving systems
177Driving and parking Z
R
if you are predominantly driving slower
than 50 mph (80 km/h) or faster than
112 mph (180 km/h)
R if you are currently using COMAND or
making a telephone call with it
R if the time has been set incorrectly
R in active driving situations, such as when
you change lanes or change your speed
Warning and display messages in the
multifunction display X
Activate ATTENTION ASSIST using the on-
board computer (Y page 202).
Symbol 0003appears in the multifunction
display.
If ATTENTION ASSIST is active, you will be
warned no sooner than 20 minutes after your
journey has begun. You the nhear an
intermittent warning tonet wice and the
Attention Assist: Take a Break! message appears in the multifunction
display.
X If necessary, take a break.
X Press the 000Bor0007 button to confirm
the message.
On long journeys, take regular breaks in good
time to allow yourself to rest properly. If you
do not take a break and ATTENTION ASSIST
still detects increasing lapses in
concentration, you will be warned again after
15 minutes at the earliest. ATTENTION ASSIST is reset when you
continue your journey and starts assessing
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 a change of drivers or
to take a break. Driving Assistance package
General notes The Driving Assistance package consists of
DISTRONIC PLUS (Y
page 166), Blind Spot
Assist (Y page 186) and Lane Keeping Assist
(Y page 187).
Blind Spot Assist Important safety notes
G
WARNING
Blind Spot Assist is only an aid designed to
assist driving. It may fail to detect some
vehicles and is no substitute for attentive
driving.
Blind Spot Assist cannot detect road and
traffic conditions. It may fail to detect narrow
vehicles, such as motorcycles or bicycles, or
may only detect them too late.
Monitoring may be affected by dirty sensors,
strong spray or poor visibility caused by snow,
rain or mist, for example. In this case, vehicles
are detected late or not at all.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognize dangers in time, cause an accident
and injure yourself and others.
i USA only:
This device has been approved by the FCC
as a “Vehicular RadarS ystem”.The radar
sensor is intended for use in an automotive
radar system only. Removal, tampering, or
altering of the device will void any
warranties, and is not permitted by the Driving systems
185Driving and parking Z
X
Turn the brightness control knob counter-
clockwise or clockwise.
If the light switch is set to 0005,0013or
000A, the brightness is dependent upon
the brightness of the ambient light.
i The light sensor in the instrument cluster
automatically controls the brightness of
the multifunction display.
In daylight, the displays in the instrument
cluster are not lit. Coolant temperature display
G
WARNING
Driving when your engine is overheated can
cause some fluids which may have leaked into
the engine compartment to catch fire. You
could be seriously burned.
Steam from an overheated engine can cause
serious burns which can occur just by opening
the engine hood. Stay away from the engine
if you see or hear steam coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of the
vehicle and do not stand near the vehicle until
the engine has cooled down.
! Adisplay message is shown if the coolant
temperature is too high.
If the coolant temperature is over
248 ‡(120 †), do not continue driving. The
engine will otherwise be damaged.
The coolan ttemperature gauge is in the
instrument cluster on the right-hand side
(Y page 29).
Under normal operating conditions and with
the specified coolant level, the coolant
temperature may rise to 248 ‡ (120 †). Tachometer
! Do not drive in the overrevving range, as
this could damage the engine. The red band in the tachometer indicates the
engine's overrevving range.
The fuel supply is interrupted to protec
tthe
engine when the red band is reached. Outside temperature display
G
WARNING
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Indicated temperatures just above the
freezing point do not guarantee that the road
surface is free of ice. The road may still be icy,
especially in wooded areas or on bridges.
The outside temperature display is in the
multifunction display (Y page 195).
Changes in the outside temperature are
displayed after a short delay. Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
R Cruise control activated (Y page 163):
The segments light up from the stored
speed to the maximum speed.
R DISTRONIC PLUS activated (Y page 166):
One or two segments in the set speed
range light up.
R DISTRONIC PLUS detectsav ehicle in front:
The segments between the speed of the
vehicle in fron tand the stored speed light
up. Displays and operation
193On-board computer and displays Z
Dialing a number from the phone book
X
Press the 0002or0005 button on the
steering wheel to selec tthe Tel menu.
X Press the 0003,0004or000B button to
switch to the phone book.
X Press the 0003or0004 button to select the
desired name.
or
X To begin rapid scrolling: press and hold
the 0003 or0004 button for longer than
one second.
Rapid scrolling stops when you release the
button or reach the end of the list.
X If only one telephone number is stored
for a name: press the0004or000B button
to start dialing.
or
X If there is more than one number for a
particular name: press the0004or000B
button to display the numbers.
X Press the 0003or0004 button to select the
number you want to dial.
X Press the 0004or000B button to start
dialing.
or
X To exit the telephone book: press the
000C or0007 button.
Redialing The on-board computer saves the last names
or numbers dialed in the redial memory.
X Press the 0002or0005 button on the
steering wheel to select the Tel menu.
X Press the 0004button to switch to the
redial memory.
X Press the 0003or0004 button to select the
desired name or number.
X Press the 0004or000B button to start
dialing.
or
X To exit the redial memory: press the
000C or0007 button. Assistance menu
Introduction In the
DriveAssist menu, you have the
following options:
R Showing the distance display
(Y page 201)
R Activating/deactivating the PRE-SAFE ®
Brake (Y page 202)
R Activating/deactivating ATTENTION
ASSIST (Y page 202)
R Activating/deactivating Blind Spot Assist
(Y page 202)
R Activating/deactivating Lane Keeping
Assist (Y page 202)
Showing the distance display X
Press 0002or0005 on the steering wheel
to select the DriveAssist menu.
X Press the 0003or0004 button to select
Distance Display .
X Press the 000Bbutton.
The DISTRONIC PLUS distance display
appears in the multifunction display
(Y page 173).
If the Sensors Deactivated message
appears, the radar sensor system is
deactivated.
X Switch on the radar sensor system
(Y page 206). Menus and submenus
201On-board computer and displays Z
Activating/deactivating PRE-SAFE
®
Brake PRE-SAFE
®
Brake is only available in vehicles
with DISTRONIC PLUS.
X Press 0002or0005 on the steering wheel
to select the DriveAssist menu.
X Press the 0003or0004 buttonto select
PRE-SAFE Brake .
X Press the 000Bbutton.
The current selection is displayed.
X To activate/deactivate: press the000B
button again.
When PRE-SAFE ®
Brake is activated, the
multifunction display shows the 0001symbol
as long as the HOLD function is not activated
(Y page 176).
Vehicles with Parking Guidance: if
PARKTRONIC is activated and you are driving
at a speed 22under 35 km/h, the 0014Parking
Guidance symbol is shown instead of the
0001 symbol (Y page 181).
If the PRE-SAFE Brake: Sensors Deactivated message appears, the radar
sensor system is deactivated.
X Switch on the radar sensor system
(Y page 206).
For more information on PRE-SAFE ®
Brake,
see (Y page 65).
Activating/deactivating ATTENTION
ASSIST X
Press 0002or0005 on the steering wheel
to select the DriveAssist menu.
X Press the 0003or0004 button to select
Attention Asst. X
Press the 000Bbutton.
The current selection is displayed.
X To activate/deactivate: press the000B
button again.
When ATTENTION ASSIST is activated, the
0002 symbol appears in the multifunction
display when the ignition is on. For further information about ATTENTION
ASSIST, see (Y
page 184).
Activating/deactivating Blind Spot
Assist X
Press 0002or0005 on the steering wheel
to select the DriveAssist menu.
X Press the 0003or0004 button to select
Blind Spot Asst .
X Press the 000Bbutton.
The current selection is displayed.
X To activate/deactivate: press the000B
button again.
If the Blind Spot Assist Deactivated message appears, the radar sensor system is
deactivated.
X
Switch on the radar sensor system
(Y page 206).
For further information about Blind Spot
Assist, see (Y page 185)
Activating/deactivating Lane Keeping
Assist X
Press 0002or0005 on the steering wheel
to select the DriveAssist menu.
X Press the 0003or0004 button to select
Lane Keep. Asst. X
Press the 000Bbutton.
The current selection is displayed.
X Press 000Bto confirm.
X Press 0004or0003 to set Off ,
Standard or
Adaptive .
X Press the 000Bbutton to save the setting.
When Lane Keeping Assist is activated, the
0001 symbol appears in the multifunction
display when the ignition is on.
For further information about Lane Keeping
Assist, see (Y page 187).202
Menus and submenusOn-board computer and displays
Service menu
In the
Serv. menu, you have the following
options:
R calling up display messages (Y page 211)
R restarting the tire pressure loss warning
system (Y page 315)
R checking tire pressure electronically
(Y page 316)
R calling up a service due date
(Y page 280) Settings menu
Introduction In the
Sett. menu, you have the following
options:
R change the instrument cluster settings
(Y page 203)
R change the light settings (Y page 204)
R change the vehicle settings (Y page 206)
R change the convenience settings
(Y page 206)
R restore the factory settings (Y page 203)
Restoring the factory settings X
Press the 0002or0005 button on the
steering wheel to select the Sett. menu.
X Press the 0004or0003 button to select the
Factory Setting submenu.X
Press 000Bto confirm.
The Reset All Settings? message
appears.
X Press the 0004or0003 button to select
No or
Yes .
X Press the 000Bbutton to confirm the
selection.
If you have selected Yes , the multifunction
display shows a confirmation message.
For safety reasons, the Daytime Running Lights: function in the
Lights submenu is
only reset if the vehicle is stationary.
Instrument cluster Selecting the unit of measurement for
distance
You can determine whether the multifunction
display shows some messages in miles or
kilometers.
X
Press the 0002or0005 button on the
steering wheel to select the Sett. menu.
X Press the 0004or0003 button to select the
Instr. Cluster submenu.
X Press 000Bto confirm.
X Press the 0004or0003 button to select the
Display Unit Speed-/Odometer: function.
You will see the selected setting:
km or
miles .
X Press the 000Bbutton to save the setting.
The selected unit of measurement for
distance applies to:
R the digital speedometer in the Trip menu
R odometer and the trip odometer
R trip computer
R current consumption and the range
R the navigation instructions in the Navi menu
R cruise control
R DISTRONIC PLUS
R ASSYST PLUS service interval display Menus and submenus
203On-board computer and displays Z
X
Press the 0004or0003 button to select the
Interior Lighting Delay: function.
You will see the selected setting: Enabledor
Disabled .
X Press the 000Bbutton to save the setting.
Vehicle Activating/deactivating the automatic
door locking mechanism
X
Press the 0002or0005 button on the
steering wheel to select the Sett. menu.
X Press the 0004or0003 button to select the
Vehicle submenu.
X Press 000Bto confirm.
X Press the 0004or0003 button to select the
Automatic Door Lock: function.
You will see the selected setting: Enabledor
Disabled .
X Press the 000Bbutton to save the setting.
If you select the Automatic Door Locks: function, the vehicle is centrally locked above
a speed of around 9 mph (15 km/h).
For further information on the automatic
locking feature, see (Y
page 78).
Activating/deactivating the acoustic
locking verification signal
If you switch on the Acoustic LockFeedback: function, an acoustic signal
sounds when you lock the vehicle.
X Press the 0002or0005 button on the
steering wheel to select the Sett. menu.
X Press the 0004or0003 button to select the
Vehicle submenu.
X Press 000Bto confirm.
X Press the 0004or0003 button to select the
Acoustic Lock Feedback: function.
You will see the selected setting: Enabledor
Disabled .
X Press the 000Bbutton to save the setting. Activating/deactivating the radar sensor
system
X
Press the 0002or0005 button on the
steering wheel to select the Sett. menu.
X Press the 0004or0003 button to select the
Vehicle submenu.
X Press 000Bto confirm.
X Press the 0003or0004 button to select
Radar Sensor (See Oper. Manual): .
You will see the selected setting: Enabled or
Disabled .
X Press the 000Bbutton to save the setting.
The following systems are switched off when
the radar sensor system is deactivated:
R DISTRONIC PLUS (Y page 166)
R BAS PLUS (Y page 60)
R PRE-SAFE ®
Brake (Y page 65)
Convenience Activating/deactivating the EASY-
ENTRY/EXIT feature
G
WARNING
You must make sure no one can become
trapped or injured by the moving steering
wheel when the easy-entry/exit feature is
activated.
To stop steering wheel movement, move
steering wheel adjustmen tlever or press one
of the memory position buttons.
Do not leave children unattended in the
vehicle, or with access to an unlocked vehicle.
Children could open the driver's door and
unintentionally activate the easy-entry/exit
feature, which could result in an accident
and/or serious personal injury.
X Press the 0002or0005 button on the
steering wheel to select the Sett. menu.
X Press the 0004or0003 button to select the
Convenience submenu.
X Press 000Bto confirm. 206
Menus and submenusOn-board computer and displays
Display messages Possible causes/consequences and
0001 Solutions
0006
Brake Immediately A malfunction has occurred while the HOLD function or
DISTRONIC PLUS is active.
At
one may also sound at regular intervals. If you attempt to lock
the vehicle, the tone becomes louder.
You cannot start the engine.
X Paying attention to the traffic situation, immediately depress the
brake pedal firmly and hold until the display message
disappears.
X Secure the vehicle against rolling away (Y page 155).
You can restart the engine. 000D(USA
only)0006(Canada
only)
Brake Immediately A malfunction has occurred while the HOLD function or
DISTRONIC PLUS is active.
At
one may also sound at regular intervals. If you attempt to lock
the vehicle, the tone becomes louder.
You cannot start the engine.
X Paying attention to the traffic situation, immediately depress the
brake pedal firmly and hold until the display message
disappears.
X Prevent the vehicle from rolling away before you leave it
(Y page 331).
You can restart the engine. 000D(USA
only)0006(Canada
only)
Check Brake Fluid Level There is not enough brake fluid in the brake fluid reservoir.
In addition, the
000D(USA only)/0006 (Canada only) warning
lamp lights up in the instrument cluster and a warning tone
sounds.
G WARNING
The braking effect may be impaired.
There is a risk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 155).
X Consult a qualified specialist workshop.
X Do not add brake fluid. This does not correct the malfunction. 0007
Check Brake Pad
Wear The brake pads/linings have reached their wear limit.
X Visit a qualified specialist workshop. Display messages
217On-board computer and displays Z