2012 MERCEDES-BENZ SLK-CLASS ROADSTER Owners Manual

GWARNING
Driving with the message Check Brake Fluid Level displayed can result in an accident. Have
your brake system checked immediately.
Do not add brake fluid before checking the brake system. Overfilling the brake fluid reservoir can
result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You can be
seriously burned.
Display messagesPossible causes/consequences and M SolutionsG
Tele Aid
InoperativeUSA only: one or more of the main functions in the mbrace system
are malfunctioning.
Canada only: one or more of the main functions of the TELEAID
system are malfunctioning.XUSA only: have the mbrace system checked at a qualified
specialist workshop.XCanada only: have the TELEAID system checked at a qualified
specialist workshop.PRE-SAFE
Inoperative See
Operator's ManualGRisk of injury
Important functions of PRE-SAFE ®
have failed. All other occupant
safety systems, e.g. air bags, remain available.
XVisit a qualified specialist workshop immediately.Display messages207On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsPRE-SAFE
Function Currently
Limited See Oper.
ManualGRisk of accident
PRE-SAFE ®
Brake is temporarily inoperative. Possible causes are:
R the DISTRONIC PLUS cover in the radiator trim is dirty
R function is impaired due to heavy rain or snow.
R the sensors in the bumpers 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.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XApply the electric parking brake.XClean the DISTRONIC PLUS cover in the radiator trim
( Y page 269).XClean the bumpers ( Y page 269).XRestart the engine.XAMG vehicles: reactivate ESP ®
(Y page 60).
If the system detects that the sensors are fully operational, the
display message disappears.
PRE-SAFE ®
Brake is operational again.
PRE-SAFE
Functions Limited
See Operator's
ManualGRisk of accident
PRE-SAFE ®
Brake is defective. BAS PLUS or the distance warning
signal may also have failed.
XVisit a qualified specialist workshop.6
SRS Malfunction
Service RequiredGRisk of injury
There is a malfunction in the SRS (Supplemental Restraint
System). The 6 warning lamp also lights up in the instrument
cluster.
XVisit a qualified specialist workshop.208Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M Solutions6
Front Left SRS
Malfunction
Service Required  
or  Front Right
Malfunction
Service RequiredGRisk of injury
SRS has malfunctioned at the front on the left or right. The 6
warning lamp also lights up in the instrument cluster.
XVisit a qualified specialist workshop.6
Left Side Curtain
Airbag Malfunction
Service Required
or Right Side
Curtain Airbag
Malfunction
Service RequiredGRisk of injury
There is a malfunction in the left-hand or right-hand head bag.
The 6 warning lamp also lights up in the instrument cluster.
XVisit a qualified specialist workshop.GWARNING
In the event a malfunction of the SRS is indicated as outlined above, the SRS may not be
operational.
For your safety, we strongly recommend that you contact an authorized Mercedes-Benz Center
immediately to have the system checked. Otherwise the SRS may not be activated when needed
in an accident, which could result in serious or fatal injury, or it might deploy unexpectedly and
unnecessarily which could also result in injury.
Display messages209On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsFront Passenger
Airbag Enabled
See Operator's
ManualThe front-passenger air bag and front-passenger knee bag are
enabled during the journey, even though:
R a child, a small adult or an object weighing less than the
system's weight threshold is located on the front-passenger
seat.
or
R the front-passenger seat is unoccupied.
The system may detect objects or forces applying additional
weight on the seat.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XApply the parking brake.XSwitch the ignition off.XOpen the front-passenger door.XRemove the child and the child restraint system from the front-
passenger seat.XMake sure that there are no objects on the seat adding to the
weight.
The system may otherwise detect the additional weight and
interpret the seat occupant's weight as greater than it actually
is.XKeep the seat unoccupied, close the front-passenger door and
switch on the ignition.
Observe the ^a(Y page 42) indicator lamp and the
multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the ^a indicator lamp must light up and remain lit. When
the indicator lamp is on, OCS ( Y page 42) has deactivated the
front-passenger air bag and front-passenger knee bag.
R the following display messages must not appear in the
multifunction display: Front Passenger Airbag Enabled
See Operator's Manual or Front Passenger Airbag
Disabled See Operator's Manual .
XWait for a period of at least 60 seconds until the necessary
system checks have been completed.XMake sure that the display messages do not appear in the
multifunction display.
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the ^a indicator lamp remains lit
or goes out depends on how OCS classifies the occupant.
210Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M SolutionsIf the conditions are not fulfilled, the system is not operating
correctly.XVisit a qualified specialist workshop immediately.GWARNING
If the ^a indicator lamp remains off even after performing the above corrective steps, do
not have any children twelve years old and under and other small individuals use the front-
passenger seat until the system has been repaired.
Display messages211On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsFront Passenger
Airbag Disabled
See Operator's
ManualThe front-passenger air bag and front-passenger knee bag are
deactivated during the journey, although:
R an adult
or
R a person larger than a certain size is occupying the front-
passenger seat.
If additional forces are applied to the seat, the system may
interpret the occupant's weight as lower than it actually is.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XApply the parking brake.XSwitch the ignition off.XHave the occupant get out of the vehicle.XKeep the seat unoccupied, close the front-passenger door and
switch on the ignition.
Observe the ^a(Y page 42) indicator lamp and the
multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the ^a indicator lamp must light up and remain lit. When
the indicator lamp is on, OCS ( Y page 42) has deactivated the
front-passenger air bag and front-passenger knee bag.
R the following display messages must not appear in the
multifunction display: Front Passenger Airbag Enabled
See Operator's Manual or Front Passenger Airbag
Disabled See Operator's Manual .
XWait for a period of at least 60 seconds until the necessary
system checks have been completed.XMake sure that the display messages do not appear in the
multifunction display.
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the ^a indicator lamp remains lit
or goes out depends on how OCS classifies the occupant.
If the conditions are not fulfilled, the system is not operating
correctly.
XVisit a qualified specialist workshop immediately.GWARNING
If the ^a indicator lamp remains lit with an adult occupant on the front-passenger seat
even after performing the above corrective steps, do not have any passenger use the front-
passenger seat until the system has been repaired.
212Display messagesOn-board computer and displays

Lights
i Display messages about LEDs:
This display message will only appear if all LEDs have failed.Display messagesPossible causes/consequences and M Solutionsb
Check Left
Cornering
Light or Check
Right Cornering
LightThe left or right-hand cornering light is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.b
Check Left Low
Beam or Check Right
Low BeamThe left or right-hand low-beam headlamp is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.b
Check Rear Left
Turn
Signal or Check
Rear Right Turn
SignalThe rear left-hand or rear right-hand turn signal is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.b
Check Front Left
Turn
Signal or Check
Front Right Turn
SignalThe front left-hand or front right-hand turn signal is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.b
Check Left Mirror
Turn
Signal or Check
Right Mirror Turn
SignalThe turn signal in the left-hand or right-hand exterior mirror is
defective.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.Display messages213On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutionsb
Check Center Brake
LampThe high-mounted brake lamp is faulty.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.b
Check Left Brake
Lamp or Check Right
Brake LampThe left or right-hand brake lamp is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.b
Check Left Tail
and Brake
Lamps or Check
Right Tail and
Brake LampsThe left or right-hand tail lamp/brake lamp is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.b
Check Left High
Beam or Check Right
High BeamThe left or right-hand high beam is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.b
License Plate LampThe license plate lamps are faulty.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.b
Check Left Fog
Lamp or Check Right
Fog LampThe left-hand or right-hand front fog lamp is defective.XCheck whether you are permitted to change the bulb yourself
( Y page 109).
or
XVisit a qualified specialist workshop.214Display messagesOn-board computer and displays