2014 MERCEDES-BENZ SLK-CLASS ROADSTER brake sensor

DISTRONIC PLUS brakes automatically so
that the set speed is not exceeded.
On long and steep downhill gradients,
especially if the vehicle is laden, you must
select a lower gear in good time. By doing so,
you will make use of the braking effect of the
engine. This relieves the load on the brake
system and prevents the brakes from
overheating and wearing too quickly.
If a slower-moving vehicle is detected in front,
DISTRONIC PLUS brakes your vehicle. It
maintains the preset distance to the vehicle
in front.
If DISTRONIC PLUS detects that there is a risk
of a collision, you will be warned visually and
acoustically. DISTRONIC PLUS cannot
prevent a collision without your intervention.
An intermittent warning tone will then sound
and the distance warning lamp will light up in
the instrument cluster. Brake immediately in
order to increase the distance to the vehicle
in front or take evasive action provided it is
safe to do so.
For DISTRONIC PLUS to assist you, the radar
sensor system must be operational.
If there is no vehicle in front, DISTRONIC
PLUS operates in the same way as cruise
control in the speed range between 20 mph
(Canada: 30 km/h) and 120 mph (Canada:
200 km/h). If a vehicle is driving in front of
you, it operates in the speed range between
0 mph (0 km/h) and 120 mph (Canada:
200 km/h).
Do not use DISTRONIC PLUS while driving on
roads with steep gradients.
As DISTRONIC PLUS transmits radar waves,
it can resemble the radar detectors of the
responsible authorities. You can refer to the
relevant chapter in the Operator's Manual if
questions are asked about this.
i USA only: This device has been approved
by the FCC as a "Vehicular Radar System".
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 FCC. Do not tamper with, alter, or use in
any non-approved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
i Canada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the
device will void any warranties, and is not
permitted. Do not tamper with, alter, or use
in any non-approved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
Important safety notes G
WARNING
DISTRONIC PLUS does not react to:
R people or animals
R stationary obstacles on the road, e.g.
stopped or parked vehicles
R oncoming and crossing traffic
As a result, DISTRONIC PLUS may neither give
warnings nor intervene in such situations.
There is a risk of an accident.
Always pay careful attention to the traffic
situation and be ready to brake. G
WARNING
DISTRONIC PLUS cannot always clearly
identify other road users and complex traffic
situations.
In such cases, DISTRONIC PLUS may:
R give an unnecessary warning and then
brake the vehicle
R neither give a warning nor intervene
R accelerate unexpectedly 170
Driving systemsDriving an
d parking

There is a risk of an accident.
Continue to drive carefully and be ready to
brake, in particular when warned to do so by
DISTRONIC PLUS. G
WARNING
DISTRONIC PLUS brakes your vehicle with up
to 40% of the maximum braking force. If this
braking force is insufficient, DISTRONIC PLUS
warns you visually and audibly. There is a risk
of an accident.
In such cases, apply the brakes yourself and
try to take evasive action.
! If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes
automatically in certain situations. To
prevent damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or other similar situations:
R when towing the vehicle
R in the car wash
If you fail to adapt your driving style,
DISTRONIC PLUS can neither reduce the risk
of accident nor override the laws of physics.
DISTRONIC PLUS cannot take into account
the road, traffic and weather conditions.
DISTRONIC PLUS is only an aid. You are
responsible for the distance to the vehicle in
front, for vehicle speed, for braking in good
time and for staying in lane.
Do not use DISTRONIC PLUS:
R in road and traffic conditions which do not
allow you to maintain a constant speed e.g.
in heavy traffic or on winding roads
R on slippery road surfaces. Braking or
accelerating could cause the drive wheels
to lose traction and the vehicle could then
skid
R when there is poor visibility, e.g. due to fog,
heavy rain or snow
DISTRONIC PLUS may not detect narrow
vehicles driving in front, e.g. motorcycles, or
vehicles driving on a different line. In particular, the detection of obstacles can
be impaired if:
R
there is dirt on the sensors or anything else
covering the sensors
R snow or heavy rain
R interference by other radar sources
R strong radar reflections, for example, in
parking garages
If DISTRONIC PLUS no longer detects a
vehicle in front, DISTRONIC PLUS may
unexpectedly accelerate the vehicle to the
stored speed.
This speed may:
R be too high if you are driving in a filter lane
or an exit lane
R be so high when driving in the right-hand
lane that you overtake vehicles in the left-
hand lane
R be so high when driving in the left-hand lane
that you overtake vehicles in the right-hand
lane
If there is a change of drivers, advise the new
driver of the speed stored.
Cruise control lever Cruise control lever
:
To store the current speed or a higher
speed
; To set the specified minimum distance
= To store the current speed or calling up
the last stored speed Driving systems
171Driving and parking Z

R
you apply the brakes again with a certain
amount of pressure until HOLD
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.
The electric parking brake automatically
secures the vehicle if the HOLD function is
activated 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
automatically switched off by the ECO
start/stop function.
R the hood is opened.
R a system malfunction occurs.
R the power supply is not sufficient.
If there is a malfunction in the vehicle
electronics, a warning message may also
appear in the multifunction display.
Brake Immediately Brake Immediately
X Immediately depress the brake firmly until
the warning message in the multifunction
display goes out.
The HOLD function is deactivated.
In vehicles with automatic transmission:
Shift to 'P'
Shift to 'P' .
X Shift the transmission to position Pto
prevent the vehicle from rolling away.
The HOLD function is deactivated. The
warning message in the multifunction
display disappears.
The horn 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 remove your seat belt.
R open the hood.
The sounding of the horn alerts you to the fact
that the vehicle has been parked while the
HOLD function is still activated. If you attempt to lock the vehicle, the tone becomes louder.
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. PARKTRONIC
Important safety notes PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates visually and
audibly the distance between your vehicle
and an object.
PARKTRONIC is only an aid. It is not a
replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking
and exiting a parking space. When
maneuvering, parking or pulling out of a
parking space, make sure that there are no
persons, animals or objects in the area in
which you are maneuvering.
! When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars.
PARKTRONIC does not detect such objects
when they are in the immediate vicinity of
the vehicle. You could damage the vehicle
or the objects.
The sensors may not detect snow and other
objects that absorb ultrasonic waves.
Ultrasonic sources such as an automatic
car wash, the compressed-air brakes on a
truck or a pneumatic drill could cause
PARKTRONIC to malfunction.
PARKTRONIC may not function correctly on
uneven terrain.
PARKTRONIC is activated automatically when
you:
R switch on the ignition.
R move the selector lever to position D,Ror
N on vehicles with automatic transmission.
R release the electric parking brake. 180
Driving syste
msDriving and parking

X
Press the =or; button on the
steering wheel to select the Sett
Settmenu.
X Press the :or9 button to select the
Lights
Lights submenu.
X Press ato confirm.
X Press the :or9 button to select the
Interior Lighting Delay
Interior Lighting Delay function.
If the Interior
Interior Lighting
LightingDelay
Delayfunction
has been switched on, the vehicle interior
is displayed in orange in the multifunction
display.
X Press the abutton to save the setting.
Vehicle Activating/deactivating the automatic
door locking mechanism
X Press the =or; button on the
steering wheel to select the Sett
Sett menu.
X Press the :or9 button to select the
Vehicle Vehicle submenu.
X Press ato confirm.
X Press the :or9 button to select the
Automatic Door Lock
Automatic Door Lock function.
When the Automatic
Automatic Door
DoorLock
Lockfunction
is activated, the left-hand vehicle door is
displayed in orange in the multifunction
display.
X Press the abutton to save the setting.
If you activate the Automatic Door Lock Automatic Door Lock
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 AcousticLock
Lockfunction,
an acoustic signal sounds when you lock the
vehicle.
X Press the =or; button on the
steering wheel to select the Sett
Sett menu.
X Press the :or9 button to select the
Vehicle Vehicle submenu. X
Press ato confirm.
X Press the :or9 button to select the
Acoustic Lock Acoustic Lock function.
If the Acoustic Acoustic Lock
Lockfunction is activated,
the & symbol in the multifunction
display lights up orange.
X Press the abutton to save the setting.
Activating/deactivating the radar sensor
system
X Press the =or; button on the
steering wheel to select the Settings
Settings
menu.
X Press the :or9 button to select the
Vehicle Vehicle submenu.
X Press ato confirm.
X Press the 9or: button to select
Radar Sensor (See Oper. Manual):
Radar Sensor (See Oper. Manual): .
You will see the selected setting: Enabled
Enabled
or Disabled
Disabled .
X Press the abutton to save the setting.
The following systems are switched off when
the radar sensor system is deactivated:
R DISTRONIC PLUS (Y page 169)
R BAS PLUS (Y page 60)
R PRE-SAFE ®
Brake (Y page 65)
Convenience Activating/deactivating the EASY-
ENTRY/EXIT feature
G
WARNING
When the EASY-ENTRY/EXIT feature adjusts
the steering wheel, you and other vehicle
occupants – particularly children – could
become trapped. There is a risk of injury.
While the EASY-ENTRY/EXIT feature is
making adjustments, make sure that no one
has any body parts in the sweep of the
steering wheel. Menus and submenus
205On-board computer and displays
Z

Display messages Possible causes/consequences and
M
MSolutions PRE-SAFE
PRE-SAFE
Functions Functions
Currently Limited Currently Limited
See Operator's See Operator's
Manual Manual
PRE-SAFE
®
Brake is deactivated or temporarily inoperative.
Possible causes are:
R function is impaired due to heavy rain or snow.
R the sensors in the radiator grill and the bumper are dirty.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
R AMG vehicles: ESP ®
is deactivated.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
When the causes stated above no longer apply, the display
message disappears.
PRE-SAFE ®
Brake is operational again.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Ypage 159).
X Clean the sensors in the radiator grill and the bumper
(Y page 283).
X Restart the engine.
X AMG vehicles: reactivate ESP ®
(Y page 63). PRE-SAFE PRE-SAFE
Functions Limited Functions Limited
See Operator's See Operator's
Manual Manual
PRE-SAFE
®
Brake is inoperative due to a malfunction. BAS PLUS
or the distance warning signal may also have failed.
X Visit a qualified specialist workshop. 6
SRS Malfunction SRS Malfunction
Service Required Service Required There is a malfunction in the SRS (Supplemental Restraint
System). The
6warning lamp also lights up in the instrument
cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
For further information about SRS, see (Y page 39). Display
messages
217On-board computer and displays Z

Display messages Possible causes/consequences and
M
MSolutions DISTRONIC PLUS
DISTRONIC PLUS
Currently Currently
Unavailable See Unavailable See
Operator's Manual Operator's Manual DISTRONIC PLUS is temporarily inoperative. Possible causes are:
R
function is impaired due to heavy rain or snow.
R the sensors in the radiator grill and the bumper are dirty.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
A warning tone also sounds.
When the causes stated above no longer apply, the display
message disappears.
DISTRONIC is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Ypage 159).
X Clean the sensors in the radiator grill and the bumper
(Y page 283).
X Restart the engine. DISTRONIC PLUS DISTRONIC PLUS
Inoperative Inoperative DISTRONIC PLUS is defective.
BAS PLUS (Brake Assist PLUS) and PRE-SAFE
®
Brake may be
inoperative as well.
A warning tone also sounds.
X Visit a qualified specialist workshop. DISTRONIC PLUS DISTRONIC PLUS
Passive Passive You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
X
Remove your foot from the accelerator pedal. DISTRONIC PLUS DISTRONIC PLUS
- - - mph - - - mph An activation condition for DISTRONIC PLUS is not fulfilled.
X
Check the activation conditions for DISTRONIC PLUS
(Y page 169). Display
messages
231On-board computer and displays Z

Display messages Possible causes/consequences and
M
MSolutions Tire Pressure
Tire Pressure
Monitor Monitor
Currently Currently
Unavailable Unavailable Due to a source of radio interference, no signals can be received
from the wheel sensors. The tire pressure monitor is temporarily
malfunctioning.
X
Drive on.
The tire pressure monitor restarts automatically as soon as the
problem has been solved. TirePress. TirePress.
Sensor(s) Missing Sensor(s) Missing There is no signal from the tire pressure sensor of one or several
wheels. The pressure of the affected tire is not displayed in the
multifunction display.
X
Have the faulty tire pressure sensor replaced at a qualified
specialist workshop. Tire Pressure Tire Pressure
Monitor Monitor
Inoperative No Inoperative No
Wheel Sensors Wheel Sensors The wheels mounted do not have a suitable tire pressure sensor.
The tire pressure monitor is deactivated.
X
Mount wheels with suitable tire pressure sensors.
The tire pressure monitor is activated automatically after driving
for a few minutes. Tire Pressure Tire Pressure
Monitor Monitor
Inoperative Inoperative The tire pressure monitor is faulty.
X
Visit a qualified specialist workshop. Vehicle
Display messages Possible causes/consequences and
M MSolutions Shift
Shift
to
to'P'
'P' or
or'N'
'N'
to Start Engine
to Start Engine You have attempted to start the engine with the transmission in
position
Ror D.
X Shift the transmission to position Por N. Apply Brake Apply Brake
to Shift from 'P' to Shift from 'P' You have attempted to move the transmission selector lever to
position
D,Ror Nwithout depressing the brake pedal.
X Depress the brake pedal. Display
messages
235On-board computer and displays Z