2015 MERCEDES-BENZ SLK-CLASS ROADSTER sensor

Useful information
iThis Operator's Manual describes all
models and all standard and optional equip- ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
iRead the information on qualified special-
ist workshops ( Ypage 25).
Important safety notes
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle while driving, you will be distracted from
traffic conditions. You could also lose controlof the vehicle. There is a risk of an accident.
Only operate the equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
You must observe the legal requirements for
the country in which you are currently driving when operating the on-board computer.
GWARNING
If the instrument cluster has failed or mal-
functioned, you may not recognize function
restrictions in systems relevant to safety. The operating safety of your vehicle may be
impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-ately.
The on-board computer only shows messages
or warnings from certain systems in the mul- tifunction display. You should therefore make sure your vehicle is operating safely at all
times.
If the operating safety of your vehicle is
impaired, pull over as soon as it is safe to do
so. Contact a qualified specialist workshop.
For an overview, see the instrument panel
illustration (
Ypage 31).
Displays and operation
Instrument cluster lighting
The lighting in the instrument cluster, in the
displays and the controls in the vehicle inte-
rior can be adjusted using the brightness con-
trol knob.
The brightness control knob is on the bottom left of the instrument cluster ( Ypage 31).
X Turn the brightness control knob counter-
clockwise or clockwise.
If the light switch is set to Ã,T or
L , the brightness is dependent upon
the brightness of the ambient light.
iThe 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
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
!A display message is shown if the coolant
temperature is too high.
194Displays and operation
On-board computer and displays

If you activate theAutomatic Door Lock
function, the vehicle is centrally locked above
a speed of around 9 mph (15 km/h).
For further information on the automatic lock- ing feature, see ( Ypage 79).
Activating/deactivating the acoustic
locking verification signal
If you switch on the
AcousticLockfunction,
an acoustic signal sounds when you lock the
vehicle.
X Press the =or; button on the steer-
ing wheel to select the
Settmenu.
X Press the :or9 button to select the
Vehiclesubmenu.
X Press ato confirm.
X Press the :or9 button to select the
Acoustic Lockfunction.
If the
AcousticLockfunction is activated,
the & symbol in the multifunction dis-
play lights up orange.
X Press the abutton to save the setting.
Activating/deactivating the radar sensor system X Press the =or; button on the steer-
ing wheel to select the
Settingsmenu.
X Press the :or9 button to select the
Vehiclesubmenu.
X Press ato confirm.
X Press the 9or: button to select
Radar Sensor (See Oper. Manual):.
You will see the selected setting:
Enabled
orDisabled.
X Press the abutton to save the setting.
The following systems are switched off when
the radar sensor system is deactivated: R DISTRONIC PLUS ( Ypage 171)
R BAS PLUS ( Ypage 62)
R PRE-SAFE ®
Brake ( Ypage 67)
Convenience
Activating/deactivating the EASY-
ENTRY/EXIT feature
GWARNING
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 mak-
ing adjustments, make sure that no one has
any body parts in the sweep of the steering
wheel.
If somebody becomes trapped:
R press one of the memory function position
buttons, or
R move the switch for steering wheel adjust-
ment in the opposite direction to that in
which the steering wheel is moving.
The adjustment process is stopped.
X Press the =or; button on the steer-
ing wheel to select the
Settmenu.
X Press the :or9 button to select the
Conveniencesubmenu.
X Press ato confirm.
X Press the :or9 button to select the
Easy Entry/Exitfunction.
If the
Easy Entry/Exitfunction is activa-
ted, the vehicle steering wheel is displayed
in orange in the multifunction display.
X Press the abutton to save the setting.
Further information on the EASY-ENTRY/EXIT feature ( Ypage 101).
Switching the belt adjustment on/off X Press the =or; button on the steer-
ing wheel to select the
Settmenu.
X Press the :or9 button to select the
Conveniencesubmenu.
X Press ato confirm.
Menus and submenus207
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
b
AutoLampFunction
Inoperative
The light sensor is defective.
X Visit a qualified specialist workshop.
b
Switch Off Lights
The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X Turn the light switch to Ã.
Adaptive Highbeam
Assist Inoperative
Adaptive Highbeam Assist is faulty. X
Visit a qualified specialist workshop.
Adaptive Highbeam
Assist Currently
Unavailable See
Operator's Manual
Adaptive Highbeam Assist is deactivated and temporarily inoper-
ative. Possible causes are:
R the windshield in the camera's field of vision is dirty.
R visibility is impaired due to heavy rain, snow or fog.
X Clean the windshield.
If the system detects that the camera is fully operational again, the
Adaptive Highbeam Assist Now Availablemessage is dis-
played.
Adaptive Highbeam Assist is operational again.
Engine
Display messagesPossible causes/consequences and MSolutions
+
Check Coolant
Level See OperaZ
tor's Manual
The coolant level is too low.
!Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Add coolant, observing the warning notes before doing so (Y page 283).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop.
?The fan motor is faulty. XAt coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in moun-
tainous terrain, and stop-and-go traffic.
228Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
CThere is only a very small amount of fuel in the fuel tank.
X Refuel at the nearest gas station without fail.
8
Gas Cap Loose
The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
X Check that the fuel filler cap is correctly closed.
If the fuel filler cap is not correctly closed: X Close the fuel filler cap.
If the fuel filler cap is correctly closed: X Visit a qualified specialist workshop.
Driving systems
Display messagesPossible causes/consequences and MSolutions
À
Attention Assist:
Take a Break!
Based on certain criteria, ATTENTION ASSIST has detected fatigue
or a lack of concentration on the part of the driver. A warning tone also sounds.
X If necessary, take a break.
During long journeys, take regular breaks in good time so you get enough rest.
À
Attention Assist
Inoperative
ATTENTION ASSIST is inoperative.
X Visit a qualified specialist workshop.
ë
Off
The HOLD function is deactivated. The vehicle is skidding.
A warning tone also sounds.
X Reactivate the HOLD function later ( Ypage 180).
RadarSensorsDeacZ
tivated See OperaZ
tor's Manual
The radar sensor system is deactivated.
X Switch on the radar sensor system ( Ypage 207).
Display messages231
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Lane Keeping
Assist Currently
Unavailable See
Operator's Manual
Lane Keeping Assist is deactivated and temporarily inoperative.
Possible causes are: R
the windshield in the camera's field of vision is dirty.
R visibility is impaired due to heavy rain, snow or fog.
R there are no lane markings for a longer period.
R the lane markings are worn, dark or covered, e.g. by dirt or snow.
When the causes stated above no longer apply, the display mes-
sage disappears.
Lane Keeping Assist 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 161).
X Clean the windshield.
Lane Keeping
Assist Inoperative
Lane Keeping Assist is faulty.
X Visit a qualified specialist workshop.
Blind Spot Assist
Currently UnavailZ
able See OperaZ
tor's Manual
Blind Spot Assist is temporarily inoperative. Possible causes are:
R the sensors are dirty.
R function is impaired 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.
When the causes stated above no longer apply, the display mes-
sage disappears.
Blind Spot Assist 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 161).
X Clean the sensors ( Ypage 289).
X Restart the engine.
232Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
Blind Spot Assist
Inoperative
Blind Spot Assist is defective.
The yellow9indicator lamps also light up in the exterior mir-
rors. X Visit a qualified specialist workshop.
Parking Guidance
Inoperative
Parking Guidance is malfunctioning ( Ypage 185).
X Restart the engine.
If the display message continues to be displayed: X Visit a qualified specialist workshop.
Parking Guidance
Canceled
Parking Guidance is deactivated. Possible causes are:
R the vehicle is skidding.
R the sensors are dirty.
R a malfunction has occurred.
A warning tone also sounds.
X Reactivate Parking Guidance later ( Ypage 185).
If the parking space symbol does not appear in the multifunction
display at speeds below 19 mph (30 km/h):
X Clean the sensors ( Ypage 289).
X Restart the engine.
If the parking space symbol still does not appear in the multifunc-
tion display at speeds below 19 mph (30 km/h):
X Visit a qualified specialist workshop.
Parking Guidance has been deactivated because you are no longer
following the recommended path. X Park again and, while doing so, observe the display messages in
the multifunction display.
Parking Guidance
Finished
The vehicle is parked. A warning tone also sounds.
The display message disappears automatically.
DISTRONIC PLUS OffDISTRONIC PLUS has been deactivated ( Ypage 171).
If it was deactivated automatically, a warning tone also sounds.
DISTRONICPLUSNow
Available
DISTRONIC PLUS is operational again after having been tempo-
rarily unavailable. You can now reactivate DISTRONIC PLUS( Y page 171).
Display messages233
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
DISTRONICPLUSCurZ
rentlyUnavailable
SeeOperator'sManZ
ual
DISTRONIC PLUS is temporarily inoperative. Possible causes are:
R function is impaired due to heavy rain or snow.
R the sensors in the radiator trim 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 sta-
tions 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 mes-
sage disappears.
DISTRONIC PLUS 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 161).
X Clean the sensors in the radiator grill and the bumper(Y page 289).
X Restart the engine.
DISTRONIC PLUS
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.
DISTRONICPLUSSusZ
pended
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
- - - mph
An activation condition for DISTRONIC PLUS is not fulfilled.
X Check the activation conditions for DISTRONIC PLUS (Y page 171).
234Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
TirePress.Monitor
Currently UnavailZ
able
Because there is interference from a strong source of radio waves,
no signals from the tire pressure sensors are detected. The tire
pressure monitor is temporarily malfunctioning.
X Drive on.
The tire pressure monitor restarts automatically as soon as the
problem has been resolved.
TirePress. SenZ
sor(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 spe-
cialist workshop.
Tire Pressure MonZ
itor Inoperative
No 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.
TirePress.Monitor
Inoperative
The tire pressure monitor is faulty.
X Visit a qualified specialist workshop.
Vehicle
Display messagesPossible causes/consequences and MSolutions
Shiftto'P'or'N'
to Start Engine
You have attempted to start the engine with the transmission in
positionRor D.
X Shift the transmission to position Por N.
Apply Brake
to Shift from 'P'
You have attempted to move the transmission selector lever to
position D,R or Nwithout depressing the brake pedal.
X Depress the brake pedal.
238Display messages
On-board computer and displays