sensor MERCEDES-BENZ SLK-CLASS ROADSTER 2016 Owner's Guide

Display messagesPossible causes/consequences andMSolutions
Radar Sensors
Dirty See Opera‐
tor's Manual
At leaston eof th efollowing drivin gsystems or drivin gsafet ysys-
tems is temporarily restricted or inoperative:
RCOLLISION PREVENTION ASSIST PLU S
RDISTRONIC PLUS
Possibl ecauses are:
Rth esensor sin th eradiato rtrim and/o rin th ebumpers are dirty
Rth efunction of th edrivin gsystem and/o rdrivin gsafet ysystem
is impaire ddue to heav yrain or snow.
A warnin gtone also sounds.
Whe nth ecauses state dabov eno longer apply, th edisplay mes -
sage disappears. Al ldrivin gsystems and drivin gsafet ysystems
are operative again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 160).
XSwitchof fth eengine.
XClean th esensor sin th efollowing location s (Ypage 285):
Rin theradiato rtrim
Rin th efron tbumper
Rin th erear bumper, particularl yin th emiddle of th erear
bumper
XRestart th eengine.
The display message disappears.
6
SRS Malfunction
Servic eRequired
The restrain tsystem is faulty. The 6warnin glamp also lights
up in th einstrumen tcluster.
GWARNIN G
The air bags or Emergency Tensioning Devices may either be trig-
gered unintentionally or, in th eevent of an accident, may no tbe
triggered .
There is an increase dris kof injury.
XVisit aqualified specialist workshop .
Fo rfurther information about th erestrain tsystem, see
(
Ypage 40) .
220Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
b
AutoLampFunction
Inoperative
The ligh tsensor is defective.
XVisit aqualified specialist workshop .
b
Switch Off Lights
You leaveth evehicl eand th eligh tis still switched on . Awarnin g
tone also sounds.
XTur nth eligh tswitch to position Ã.
Adaptive Highbeam
Assist Inoperative
Adaptive Highbeam Assis tis faulty.
XVisit aqualified specialist workshop .
Adaptive Highbeam
Assist Currently
Unavailable See
Operator'sManual
Adaptive Highbeam Assis tis deactivated and temporarily inoper -
ative. Possibl ecauses are:
Rth ewindshield in th ecamera' sfield of vision is dirty.
Rvisibility is impaire ddue to heav yrain ,snow or fog.
XClean th ewindshield.
If th esystem detects that th ecamera is full yoperational again ,th e
Adaptive
HighbeamAssistNowAvailablemessage appears .
Adaptive Highbeam Assis tis operational again .
Engine
Display messagesPossible causes/consequences and MSolutions
+
Check Coolant
Level See Opera‐
tor's Manual
The coolantlevel is to olow.
!Avoid makin glon gjourneys wit hto olittl ecoolan tin th eengin e
coolin gsystem. The engin ewill otherwise be damaged.
XAd dcoolant, observin gth ewarnin gnote sbefore doin gso
(
Ypage 279).
XIf you need to add coolan tmor eofte nthan usual, hav eth e
engin ecoolan tsystem checke dat aqualified specialist work-
shop.
?The fan motor is faulty.
XAt coolan ttemperatures belo w24 8 ‡ (120†), drive to th e
neares tqualified specialist workshop .
XAvoid subjecting theengin eto heav yloads ,e.g. drivin gin moun-
tainous terrain ,and stop-and-g otraffic.
Display messages22 7
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
LaneKeepin g
Assist Currently
Unavailable See
Operator' sManual
Lan eKeepin gAssis tis deactivated and temporarily inoperative.
Possibl ecauses are:
Rth ewindshield in th ecamera' sfield of vision is dirty.
Rvisibility is impaire ddue to heav yrain ,snow or fog.
Rthere hav ebeen no lan emarking sfo ran extended period.
Rth elan emarking sare worn, dark or covered, e.g. by dir tor snow.
Whe nth ecauses state dabov eno longer apply, th edisplay mes -
sage disappears.
Lan eKeepin gAssis tis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 160).
XClean th ewindshield.
Lan eKeepin g
Assist Inoperative
LaneKeepin gAssis tis faulty.
XVisit aqualified specialist workshop .
Blind SpotAssist
Currently Unavail‐
abl eSee Opera‐
tor's Manual
Blind Spot Assis tis temporarily inoperative. Possibl ecauses are:
Rth esensor sare dirty.
Rfunction is impaire ddue to heav yrain or snow.
Rth erada rsensor system is outside th eoperating temperature
range.
Rth erada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radi osta-
tion sor other source sof electromagnetic radiation .
The yello w9 indicato rlamp salso ligh tup in th eexterio rmir -
rors.
Whe nth ecauses state dabov eno longer apply, th edisplay mes -
sage disappears.
Blind Spot Assis tis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 160).
XClean th esensor s (Ypage 285).
XRestart th eengine.
Display messages23 1
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Blind SpotAssist
Inoperative
Blind Spot Assis tis defective.
The yello w9 indicato rlamp salso ligh tup in th eexterio rmir -
rors.
XVisit aqualified specialist workshop .
ParkingGuidance
Inoperative
Parking Guidance is malfunctionin g (Ypage 184).
XRestart theengine.
If th emultifunction display still shows th edisplay message :
XVisitaqualified specialist workshop .
ParkingGuidance
Canceled
Parking Guidance is deactivated. Possibl ecauses are:
RThe vehicl eis skidding.
Rth esensor sare dirty.
Ra malfunction has occurred .
A warnin gtone also sounds.
XReactivat eParking Guidance later (Ypage 184).
If th emultifunction display does no tsho wtheparkin gspac esym -
bol at speeds belo w19 mph (30 km/h):
XClean th esensor s (Ypage 285).
XRestart th eengine.
If th emultifunction display still does no tsho wtheparkin gspac e
symbol at speeds belo w19 mph (30 km/h):
XVisit aqualified specialist workshop .
Parking Guidance has been deactivated because you are no longer
following therecommended path.
XPar kagain and ,while doin gso, observ eth edisplay message sin
th emultifunction display.
Parkin gGuidance
Finished
The vehicl eis parked. Awarnin gtone also sounds.
The display message disappear sautomatically.
DISTRONIC PLU SOffDISTRONIC PLU Shas been deactivated (Ypage 170).
If it was deactivated automatically, awarnin gtone also sounds.
DISTRONICPLU SNow
Available
DISTRONIC PLU Sis operational again after havin gbeen tempo -
rarily unavailable .You can no wreactivat eDISTRONIC PLU S
(
Ypage 170).
232Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
DISTRONICPLUSCur‐
rentlyUnavailable
SeeOperator' sMan‐
ual
DISTRONIC PLU Sis temporarily inoperative. Possibl ecauses are:
Rth erada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radi osta-
tion sor other source sof electromagnetic radiation .
Rthesystem is outside th eoperating temperature range.
RThe on-boar dvoltag eis to olow.
A warnin gtone also sounds.
Whe nth ecauses state dabov eno longer apply, th edisplay mes -
sage disappears.
DISTRONIC PLU Sis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 160).
XRestart th eengine.
DISTRONIC PLU S
Inoperative
DISTRONIC PLUSis defective.
A warnin gtone also sounds.
XVisit aqualified specialist workshop .
DISTRONICPLUSSus‐
pended
You hav edepressed th eaccelerato rpedal .DISTRONIC PLU Sis no
longer controllin gth espeed of th evehicle.
XRemove your foot from th eaccelerato rpedal .
DISTRONICPLUS--
-mph
An activation condition fo rDISTRONIC PLU Sis no tfulfilled .
XCheckth eactivation condition sfo rDISTRONIC PLU S
(
Ypage 170).
Cruise Contro l
Inoperative
Cruisecontrol is malfunctioning.
A warnin gtone also sounds.
XVisit aqualified specialist workshop .
CruiseControl--
-mph
Acondition fo ractivatin gcruise control has no tbeen fulfilled .
You hav etried to store aspeed belo w20 mph (30 km/ h), for
example.
XIf conditions permit, drive faster than 20 mph (30 km/ h)and
store the speed.
XCheck the activation conditions for cruise control (Ypage 168).
Display messages233
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
TirePress. Moni‐
tor Currently
Unavailable
Becaus ethere is interferenc efrom astron gsource of radi owaves,
no signal sfrom th etire pressur esensor sare detected. The tire
pressur emonitor is temporarily malfunctioning.
XDrive on .
The tire pressur emonitor restarts automatically as soo nas th e
problem has been resolved.
TirePress .Sen ‐
sor(s) Missin g
There is no signal from th etire pressur esensor of on eor several
wheels. The pressur eof th eaffecte dtire does no tappea rin th e
multifunction display.
XHav eth efault ytire pressur esensor replaced at aqualified spe -
cialist workshop .
TirePressure Mon ‐
itorInoperative
No Wheel Sensor s
The wheels mounted do no thav e a suitable tire pressur esensor .
The tire pressur emonitor is deactivated.
XMoun twheels wit hsuitable tire pressur esensors.
The tire pressur emonitor is activated automatically after drivin g
fo r a few minutes.
Tir ePress. Moni‐
tor Inoperative
The tire pressur emonitor is faulty.
XVisit aqualified specialist workshop .
Vehicle
Display messagesPossible causes/consequences and MSolutions
Shift to 'P' or
'N'toStartEngine
You haveattempte dto start th eengin ewit hth etransmissio nin
position Ror D.
XShift th etransmissio nto position Por N.
Apply Brake to
Shift fro m'P'
You hav eattempte dto mov eth etransmissio nselector lever to
position D,Ror Nwithout depressin gth ebrak epedal .
XDepress th ebrak epedal .
To Deselect Por
N, Depres sBrake
and Start Engine
Wit hth eengin eswitched off, you hav eattempte dto shift th e
transmissio nout of position Por Ninto another transmissio n
position .
XDepress th ebrak epedal .
XStart th eengine.
236Display messages
On-board computer and displays

Engine
ProblemPossible causes/consequences andMSolutions
;
The yellow Check
Engine warning lamp
lights up while the
engine is running.There may be a malfunction, for example:
Rin the engine management
Rin the fuel injection system
Rin the exhaust system
Rin the ignition system
Rin the fuel system
The emission limit values may be exceeded and the engine may be
in emergency mode.
XHave the vehicle checked as soon as possible at a qualified
specialist workshop.
iIn some states, you must immediately visit a qualified special-
ist workshop as soon as the yellow Check Engine warning lamp
lights up. This depends on the locally applicable legal require-
ments. If in doubt, check whether such legal regulations apply in
the state in which you are currently driving.
8
The yellow reserve fuel
warning lamp lights up
while the engine is run-
ning.The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.
8
The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the ;
Check Engine warning
lamp may light up.The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
XCheck that the fuel filler cap is correctly closed.
XIf the fuel filler cap is not correctly closed: close the fuel filler
cap.
XIf the fuel filler cap is closed: visit a qualified specialist work-
shop.
?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gage is at the
start of the scale.The temperature sensor for the coolant temperature gage is defec-
tive.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions. Do not continue
driving under any circumstances.
XSecure the vehicle against rolling away (Ypage 160).
XConsult a qualified specialist workshop.
Warning and indicator lamps249
On-board computer and displays
Z

XClean the inside and outside of the win-
dows with a damp cloth and a cleaning
agent that isrecommended and approved
by Mercedes-Benz.
Cleaning wiper blades
GWARNIN G
You could become trapped by th ewindshield
wiper sif they start moving while cleanin gth e
windshield or wiper blades .Ther eis aris kof
injury.
Always switch off th ewindshield wiper sand
th eignition before cleanin gth ewindshield or
wiper blades .
!Do not pull the wiper blade. Otherwise,
the wiper blade could be damaged.
!Do not clean wiperblades too often and
do not rub them too hard. Otherwise, the
graphite coating could be damaged. This
could cause wipernoise.
!Holdthe wiper arm securely when folding
back. The windshield could be damaged if
the wiper arm smacks against it suddenly.
XFoldthe windshield wiper arms away from
the windshield.
XCaref ullyclean the wiper blades with a
damp cloth.
XFo ldthe windshield wiper arms back again
before switching on the ignition.
Cleaning the exterior lighting
!Only use cleaning agents or cleaning
cloths which are suitable for plastic light
lenses. Unsuitable cleaning agents or
cleaning cloths could scratch or damage
the plastic light lenses.
XClean the plastic lenses of the exterior
lighting using a wet sponge and a mild
cleaning agent, e.g. Mercedes-Benz car
shampoo or cleaning cloths.
Cleaning the mirror turn signals
!Only use cleaning agents or cleaning
cloths that are suitable for plastic lenses.
Unsuitable cleaning agents or cleaning
cloths could scratch or damage the plastic lenses of the mirror turn signals.
XClean the plastic lenses of the mirror turn
signals inthe exterior mirror housing using
a wet sponge and mild cleaning agent, e.g.
Mercedes-Benz car shampoo or cleaning
cloths.
Cleaning the sensors
!If you clean the sensors with a power
washer, make sure that you keep a dis-
tance of at least 11.8 in(30 cm )betwee n
th evehicl e and the power washer nozzle.
Information about the correct distance is
available from the equipment manufac-
turer.
XClean sensors :of the driving systems
with water, car shampoo and a soft cloth.
Cleaning the exhaust pipe
GWARNING
The exhaust tail pipeand tail pipetrim can
become very hot. Ifyou come into contact
Care285
Maintenance and care
Z

XBefore restarting, make sure that the tire
pressures are set properly on all four tires
for the respective operating conditions.
The recommended tire pressure can be
found on the Tire and Loading Information
placard on the B-pillar. Additionally, a tire
pressure table is attached to the fuel filler
flap. The tire pressure loss warning systemcan only give reliable warnings if you have
set the correct tire pressure. If an incorrect
tire pressure is set, these incorrect values
will be monitored.
XAlso observe the notes in the section on tire
pressures (
Ypage 311).
XMake sure that the SmartKey is in position
2 in the ignition lock (
Ypage 139).
XPress the =or; button on the steer-
ing wheel to select the Serv.
menu.
XPress the9or: button to select
Tire Pressure
.
XPress the abutton.
The Run Flat Indicator Active
Press 'OK' to Restartmessage
appears in the multifunction display.
If you wish to confirm the restart:
XPress the abutton.
The Tire Pressure Now OK?
message
appears in the multifunction display.
XPress the 9or: button to select
Yes
.
XPress the abutton.
The Run Flat Indicator Restarted
message appears in the multifunction dis-
play.
After a teach-in period, the tire pressure
loss warning system will monitor the set
tire pressures of all four tires.
If you wish to cancel the restart:
XPress the %button.
or
XIf the Tire Pressure Now OK?message
appears, use the 9or: button to
select Cancel
.
XPress the abutton.
The tire pressure values stored at the last
restart will continue to be monitored.
Tire pressure monitor
General notes
If a tire pressure monitor is installed, the vehi-
cle's wheels have sensors that monitor the
tire pressures in all four tires. The tire pres-
sure monitor warns you if the pressure drops
in one or more of the tires. The tire pressure
monitor only functions if the corresponding
sensors are installed in all wheels.
Information on tire pressures is displayed in
the multifunction display. After a few minutes
of driving, the current tire pressure of each
tire is shown in the Serv.
menu of the multi-
function display.
Example: current tire pressure display
For information on the message display, refer
to the "Checking the tire pressure electroni-
cally" section (
Ypage 318).
Important safety notes
GWARNING
Each tire, including the spare (if provided),
should be checked at least once a month
when cold and inflated to the pressure rec-
ommended by the vehicle manufacturer on
the Tire and Loading Information placard on
the driver's door B-pillar or the tire pressure
label on the inside of the fuel filler flap. If your
vehicle has tires of a different size than the
size indicated on the Tire and Loading Infor-
mation placard or the tire pressure label, you
316Tire pressure
Wheels and tires

imately one minute and then remaining lit.
When the malfunction has been rectified, the
tire pressure warning lamp goes out after a
few minutes of driving.
The tire pressure values indicated by the on-
board computer may differ from those meas-
ured at a gas station with a pressure gage.
The tire pressures shown by the on-board
computer refer to those measured at sea
level. At high altitudes, the tire pressure val-
ues indicated by a pressure gage are higher
than those shown by the on-board computer.
In this case, do not reduce the tire pressures.
The operation of the tire pressure monitor canbe affected by interference from radio trans-
mitting equipment (e.g. radio headphones,
two-way radios) that may be being operated
in or near the vehicle.
Checking the tire pressure electroni-
cally
XMake sure that the SmartKey is in position
2 in the ignition lock (
Ypage 139).
XPress the =or; button on the steer-
ing wheel to select the Serv.
menu.
XPress the9or: button to select
Tire Pressure
.
XPress the abutton.
The current tire pressure of each tire is
shown in the multifunction display.
If the vehicle has been parked for over
20 minutes, the Tire pressure will be
displayed after driving a few
minutesmessage appears.
After a teach-in process, the tire pressure
monitor automatically detects new wheels or
new sensors. As long as a clear allocation of
the tire pressure value to the individual
wheels is not possible, the Tire Pressure
Monitor Activedisplay message is shown
instead of the tire pressure display. The tire
pressures are already being monitored.
iIf an emergency spare wheel is mounted,
the system may continue to show the tire
pressure of the wheel that has been removed for a few minutes. If this occurs,
note that the value displayed for the posi-
tion where the spare wheel is mounted is
not the same as the current tire pressure of
the emergency spare wheel.
Tire pressure monitor warning mes-
sages
If the tire pressure monitor detects a pressure
loss in one or more tires, a warning message
is shown in the multifunction display and the
yellow tire pressure monitor warning lamp
comes on.
RIf the Please Correct Tire Pressure
message appears in the multifunction dis-
play, the tire pressure in at least one tire is
too low and must be corrected at the next
opportunity.
RIf theCheckTiresmessage appears in the
multifunction display, the tire pressure in
one or more tires has dropped significantly
and the tires must be checked.
RIf the Warning Tire Malfunction
appears in the multifunction display, the
tire pressure in one or more tires has drop-
ped suddenly and the tires must be
checked.
Observe the instructions and safety notes in
the display messages in the "Tires" section
(
Ypage 234).
iIf the wheel positions on the vehicle are
rotated, the tire pressures may be dis-
played for the wrong positions for a short
time. This is rectified after a few minutes of
driving, and the tire pressures are displayed
for the correct positions.
Restarting the tire pressure monitor
When you restart the tire pressure monitor, all
existing warning messages are deleted and
the warning lamps go out. The monitor uses
the currently set tire pressures as the refer-
ence values for monitoring. In most cases, the
tire pressure monitor will automatically
detect the new reference values after you
318Tire pressure
Wheels and tires