2012 MERCEDES-BENZ SLS AMG COUPE Owners Manual

Display messagesPossible causes/consequences and M Solutionsb
Check Left Brake
Lamp
or
Check Right Brake
LampThe left or right-hand brake light LEDs do not light up.XVisit a qualified specialist workshop.b
Check Left Tail
Lamp
or
Check Right Tail
LampThe left or right-hand tail lamp LEDs do not light up.XVisit a qualified specialist workshop.b
Check Left High
Beam
or
Check Right High
BeamThe left or right-hand high-beam headlamp does not light up.XVisit a qualified specialist workshop.b
Check Left License
Plate Lamp
or
Check Right
License Plate LampThe left or right-hand license plate lamp does not light up.XReplace the bulb ( Y page 99).b
Backup lightNone of the LEDs in the backup lamp light up.XVisit a qualified specialist workshop.b
Left daytime
running lamp
or
Right daytime
running lampThe LEDs in the left or right-hand daytime running lamp do not
light up. As a result, the corresponding side/standing lamp has
failed.XVisit a qualified specialist workshop.Displays and operation175On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutionsb
Check Front Left
Sidemarker Lamp
or
Check Front Right
Sidemarker Lamp The left or right front side marker lamp is defective.XVisit a qualified specialist workshop.b
Check Rear Left
Sidemarker Lamp
or
Check Rear Right
Sidemarker LampThe rear left or right side marker lamp is defective.XVisit a qualified specialist workshop.b
Check Front Left
Parking Lamp
or
Check Front Right
Parking LampThe front left or front right parking or standing lamp is defective.XVisit a qualified specialist workshop.b
Switch off lightsThe lights are still switched on when you leave the vehicle. A
warning tone also sounds.XTurn the light switch to c.b
Malfunction See
Operator's ManualThe exterior lighting is defective.XVisit a qualified specialist workshop.
Engine
GWARNING
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.
GWARNING
Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn
if it comes into contact with hot engine parts. You could be seriously burned.
176Displays and operationOn-board computer and displays

Display messagesPossible causes/consequences and M Solutions?
Coolant Low Stop
Vehicle Turn
Engine OffThe coolant is too hot. In addition, the ? warning lamp in the
instrument cluster lights up and a warning tone sounds.XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.XMake sure that the air supply to the radiator is not blocked, e.g.
by snow, slush or ice.XWait until the display message disappears before restarting the
engine. Otherwise, the engine could be damaged.XPay attention to the coolant temperature display.XIf the coolant temperature increases again, visit a qualified
specialist workshop immediately.
! If the coolant temperature is over 248 ‡ (120 †), do not
continue driving. The engine will otherwise be damaged.
The poly-V-belt may have torn. A warning tone also sounds.XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.XCheck the poly-V-belt.XIf the poly-V-belt is not damaged: do not start the engine
again until the display message disappears. Otherwise, the
engine could be damaged.XIf the poly-V-belt is torn: do not continue driving. Consult a
qualified specialist workshop.?The engine fan is defective.XAt coolant temperatures under 248 ‡(120 †), drive to the next
qualified specialist workshop.XAvoid subjecting the engine to heavy loads (e.g. driving in
mountainous terrain) and stop-and-go driving.Displays and operation177On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutions#The battery is not being charged.
A warning tone also sounds.
Possible causes are:
R a defective alternator
R a torn poly-V-belt
R a malfunction in the electronicsXPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.XOpen the hood.XCheck whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
XConsult a qualified specialist workshop.
If the poly-V-belt is not damaged:
XVisit a qualified specialist workshop.+
Check Coolant
Level See
Operator's ManualThe coolant level is too low.Xadd coolant, observing the warning notes before doing so
( Y page 220).XIf coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist
workshop.
! The coolant level is too low. Avoid making long journeys with
too little coolant in the cooling system. The engine will otherwise
be damaged.
The display messages and the corresponding symbol that
indicate that the coolant level is too low must not be ignored.
4
Engine Oil Level
low Stop Vehicle
Turn Engine OffThere is insufficient oil in the engine. There is a risk of engine
damage.XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.XTop up and check the engine oil level ( Y page 219).178Displays and operationOn-board computer and displays

Display messagesPossible causes/consequences and M Solutions4
Check Engine Oil
Level (Add 1 Liter)The oil level is too low.XCheck the oil level ( Y page 219).XIf necessary, add engine oil.XHave the engine checked for leaks if you need to add engine oil
more often than usual.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
www.mbusa.com (USA only).
! The oil level is too low. Avoid long journeys with too little engine
oil. There is a risk of engine damage.
The display messages and the corresponding symbol that
indicate that the oil level is too low must not be ignored.
4
Engine Oil Level
Too HighYou have added too much engine oil. The engine or catalytic
converter may be damaged.XSiphon off excess engine oil until it is at the specified level.
Observe the legal requirements.4
Engine Oil Level
Cannot Be MeasuredThe measuring system is faulty.XVisit a qualified specialist workshop.4
Engine Oil
Pressure Control
See Operator's
ManualThe oil pressure sensor has reported a malfunction.
The oil pressure control is running in emergency mode.
Engine lubrication is guaranteed.XVisit a qualified specialist workshop.4
Engine Oil
Pressure Stop
Vehicle Turn
Engine Off XPull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.XCheck the engine oil level (Y page 219) and top up if necessary.XIf there are visible signs of oil loss from the vehicle, consult a
qualified specialist workshop.CThere is only a small amount of fuel in the fuel tank.XRefuel at the nearest gas station.8
Fuel Level LowThe fuel level has fallen below the reserve range.XRefuel at the nearest gas station.Displays and operation179On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutions8
Gas Cap LooseThe 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.
If the fuel filler cap is not correctly closed:
XClose the fuel filler cap.
If the fuel filler cap is correctly closed:
XVisit a qualified specialist workshop.¸
Replace Air FilterThe engine air filter is dirty and must be replaced.XVisit a qualified specialist workshop.!
Check Fuel FilterVehicles with a diesel engine: there is water in the fuel filter. The
water must be drained off.XVisit a qualified specialist workshop.
Driving systems
Display messagesPossible causes/consequences and M SolutionsCruise Control
InoperativeCruise control is defective.
A warning tone also sounds.XVisit a qualified specialist workshop.Cruise Control
--- mphA condition for activating cruise control has not been fulfilled.
You attempted to save a speed of less than 20 mph (30 km/h).XActivate ESP ®
(Y page 57).XIf the situation allows, drive faster than 20 mph ( 30 km/h) and
save the speed.XCheck the activation conditions for cruise control
( Y page 136).180Displays and operationOn-board computer and displays

Display messagesPossible causes/consequences and M SolutionsBlind Spot Assist
InoperativeBlind Spot Assist is defective.
The yellow 9 indicator lamps also light up in the exterior
mirrors.XVisit a qualified specialist workshop.Blind Spot Assist
Currently
Unavailable See
Operator's ManualBlind Spot Assist is temporarily inoperative if:
R the sensors are dirty.
R its 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
stations or other sources of electromagnetic radiation.
The yellow 9 indicator lamps also light up in the exterior
mirrors.
Blind Spot Assist is operational again and the display message
disappears if:
R the dirt (e.g. slush) drops away while the vehicle is in motion.
R the system detects that the sensors are fully available again.
R the radar sensor system is back within the operating
temperature range.
If the display message continues to be displayed:XClean the sensors ( Y page 228).XRestart the engine.
Tires
GWARNING
Do not drive with a flat tire. A flat tire affects the ability to steer or brake the vehicle. You may
lose control of the vehicle. Continued driving with a flat tire will cause excessive heat build-up
and possibly a fire.
GWARNING
Follow recommended tire inflation pressures.
Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect
handling and fuel economy, and are more likely to fail from being overheated.
Do not overinflate tires. Overinflated tires can adversely affect handling and ride comfort, wear
unevenly, increase stopping distance, and result in sudden deflation (blowout) because they are
more likely to become punctured or damaged by road debris, potholes etc.
Displays and operation181On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsTire Press. Monitor
InoperativeThe tire pressure monitor is faulty.XVisit a qualified specialist workshop.Tire Pressure
Monitor
Inoperative No
Wheel SensorsThe wheels mounted do not have a suitable tire pressure sensor.
The tire pressure monitor is deactivated.XMount wheels with suitable tire pressure sensors.
The tire pressure monitor is activated automatically after driving
for a few minutes.Check
TiresGRisk of accident
The tire pressure in one or more tires has dropped significantly.
The wheel position is displayed in the multifunction display.
A warning tone also sounds.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XCorrect the tire pressure ( Y page 257).XIf necessary, change a wheel ( Y page 271).Tire Press. Warning
Caution Tire
MalfunctionGRisk of accident
The tire pressure in one or more tires has dropped suddenly. The
wheel position is displayed in the multifunction display.
A warning tone also sounds.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XIf necessary, change a wheel ( Y page 271).Correct
Tire PressureThe tire pressure is too low in at least one of the tires or the tire
pressure difference between the wheels is too great.XCheck the tire pressures at the next opportunity. If necessary,
correct the tire pressure ( Y page 257).TirePress.
Sensor(s)MissingThere 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.XHave the faulty tire pressure sensor replaced at a qualified
specialist workshop.Tire Press. Monitor
Currently
UnavailableDue to a source of radio interference, no signals can be received
from the wheel sensors. The tire pressure monitor is temporarily
malfunctioning.XDrive on.
The tire pressure monitor restarts automatically as soon as the
problem has been solved.182Displays and operationOn-board computer and displays