2011 MERCEDES-BENZ S-Class Inoperative

BrakesDisplay messagesPossible causes/consequences and M Solutions!÷
Currently
Unavailable See
Operator's ManualGRisk of accident
ABS (Anti-lock Braking System), ESP ®
(Electronic Stability
Program), BAS (Brake Assist), PRE-SAFE ®
, HOLD and hill start
assist are temporarily unavailable. The self-diagnosis function
might not be complete, for example. BAS PLUS (Brake Assist
PLUS) and PRE-SAFE ®
Brake may be inoperative as well. In
addition, the ÷, å and ! warning lamps light up in the
instrument cluster.
ATTENTION ASSIST 25
is deactivated.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
XOn a suitable road, carefully drive the vehicle making slight
steering movements at a speed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
XDrive on carefully.XVisit a qualified specialist workshop.GRisk of accident
ABS, ESP ®
, BAS, PRE-SAFE ®
, HOLD and hill start assist are
temporarily unavailable. The on-board voltage may be insufficient,
for example. BAS PLUS and PRE-SAFE ®
Brake may also have
failed. In addition, the ÷, å and ! warning lamps light
up in the instrument cluster.
ATTENTION ASSIST 25
is deactivated.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
XDrive on carefully.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
XDrive on carefully.XVisit a qualified specialist workshop.25 Not available on HYBRID vehicles.388Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M Solutions!÷
Inoperative See
Oper. ManualGRisk of accident
ABS, ESP ®
, BAS, PRE-SAFE ®
, HOLD and hill start assist are
unavailable due to a malfunction. BAS PLUS and PRE-SAFE ®
Brake
may also have failed. In addition, the ÷, å and !
warning lamps light up in the instrument cluster.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
ATTENTION ASSIST 25
is deactivated.
XDrive on carefully.XVisit a qualified specialist workshop immediately.T !
÷
Inoperative See
Oper. Manual GRisk of accident
EBD (Electronic Brake force Distribution), ABS, ESP ®
, BAS, PRE-
SAFE ®
, HOLD and hill start assist are unavailable due to a
malfunction. BAS PLUS and PRE-SAFE ®
Brake may also have
failed. In addition, the ÷, å and ! warning lamps in the
instrument cluster light up and a warning tone sounds.
ATTENTION ASSIST is deactivated.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
XDrive on carefully.XVisit a qualified specialist workshop immediately.#
Brake wearThe brake pads/linings have reached their wear limit.XVisit a qualified specialist workshop.F
(USA only)
!
(Canada only)
Release parking
brakeThe red F (USA only)/ ! (Canada only) indicator lamp
flashes and a warning tone sounds.
You are driving with the electric parking brake applied.XRelease the electric parking brake.
or
XPull away carefully ( Y page 317).25
Not available on HYBRID vehicles.Display messages389On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsF
(USA only)
!
(Canada only)
Pkg Brake
InoperativeThe yellow F (USA only)/ ! (Canada only) warning lamp
lights up. The red F (USA only)/ ! (Canada only) indicator
lamp flashes for approximately 10 seconds after application or
release F (USA only)/ ! (Canada only). It then goes out or
remains lit.
The electric parking brake is malfunctioning.XSwitch the ignition off and on, and then apply the electric
parking brake.
If it is not possible to apply the electric parking brake:
XShift the transmission to P.XUse the folding wheel chock (Y page 464) from the vehicle tool
kit to secure the vehicle against rolling away.XConsult a qualified specialist workshop.F
(USA only)
!
(Canada only)
Turn On the
Ignition to
Release the
Parking BrakeThe red F (USA only)/ ! (Canada only) indicator lamp lights
up.
You have attempted to release the electric parking brake with the
ignition switched off.XKey: turn the key to position 1 in the ignition lock.XKEYLESS-GO: switch on the ignition.$
(USA only)
J
(Canada only)
Service See Oper.
ManualThere is a malfunction in the system. The brake system continues
to operate normally.XDrive on carefully.XVisit a qualified specialist workshop.$
(USA only)
J
(Canada only)
Check Brake Fluid
LevelGRisk of accident
There is insufficient brake fluid in the brake fluid reservoir.
Additionally, the red $ (USA only)/ J (Canada only)
warning lamp lights up in the instrument cluster and a warning
tone sounds.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.XApply the parking brake.XConsult a qualified specialist workshop.XDo not add brake fluid. This will not rectify the malfunction.Display messages393On-board computer and displaysZ

Display messagesPossible causes/consequences and M Solutionsb
Active Headlamps
InoperativeThe active light function is faulty.XVisit a qualified specialist workshop.b
Malfunction See
Oper. ManualThe exterior lighting is faulty.XVisit a qualified specialist workshop.b
AUTO Lamp Function
InoperativeThe light sensor is faulty.XVisit a qualified specialist workshop.
USA only:
XSwitch off the daytime running lamps in the on-board computer
( Y page 377).XSwitch the lights on and off using the light switch.b
Please Switch Off
LightsThe lights are still switched on when you leave the vehicle. A
warning tone also sounds.XTurn the light switch to $ or c .
or
XIf the rear fog lamp is switched on: press the light switch in to
the stop.Adaptive High-beam
Assist
InoperativeAdaptive Highbeam Assist is faulty.XVisit a qualified specialist workshop.
Engine
Display messagesPossible causes/consequences and M Solutions+
Check Coolant
Level See Oper.
ManualThe coolant level is too low.XAdd coolant, observing the warning notes when doing so
( Y page 450).XIf coolant needs adding more often than usual, have the engine
coolant system checked at a qualified specialist workshop.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.
Display messages397On-board computer and displaysZ

Driving systemsDisplay messagesPossible causes/consequences and M SolutionsÀ
Attention Assist:
Drowsiness
detectedBased on certain criteria, ATTENTION ASSIST has detected fatigue
or a lack of concentration on the part of the driver. A warning tone
also sounds.XIf necessary, take a break.
During long journeys, take regular breaks in good time so you get
enough rest.
À
Attention Assist
InoperativeATTENTION ASSIST is inoperative.XVisit a qualified specialist workshop.Á
Night View Assist
InoperativeNight View Assist Plus is faulty.XVisit a qualified specialist workshop.Á
Night View Assist
Currently
UnavailableThe temperature of the camera is too high.XWait until you see the Night View Assist Available
Again display message.
You can also:
XFold the camera cover down ( Y page 457).XAdjust the air distribution of the automatic air conditioning
upwards.Á
Night View Assist
Lights Must Be Set
to AUTO or ONA condition for activating Night View Assist Plus has not been met.XTurn the light switch to c or L .Á
Night View Assist
Not in Reverse GearA condition for activating Night View Assist Plus has not been met.XShift the transmission to P, N or D.Á
Night View Assist
Lights ON or AUTO,
Not in R GearA condition for activating Night View Assist Plus has not been met.XTurn the light switch to c or L .XShift the transmission to P, N or D.Display messages401On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsLane Keeping
Assist Currently
Unavailable See
Oper. Manual
Active Lane
Keeping Assist
Currently
Unavailable See
Oper. ManualLane Keeping Assist or Active Lane Keeping Assist is deactivated
and temporarily inoperative if:
R the windshield is dirty in the camera’s field of vision.
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, for example by dirt
or snow.
Lane Keeping Assist or Active Lane Keeping 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 camera is fully operational again.
If the display message continues to be displayed:XClean the windshield.Lane Keeping
Assist Inoperative
Active Lane
Keeping Assist
InoperativeLane Keeping Assist or Active Lane Keeping Assist is faulty.XVisit a qualified specialist workshop.Blind Spot Assist
Currently
Unavailable See
Oper. Manual
Active Blind Spot
Assist Currently
Unavailable See
Oper. ManualBlind Spot Assist or Active Blind 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 or Active 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 456).XRestart the engine.404Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M SolutionsBlind Spot Assist
Inoperative
Active Blind Spot
Assist InoperativeBlind Spot Assist or Active Blind Spot Assist is faulty.
The yellow 9 indicator lamps also light up in the exterior
mirrors.XVisit a qualified specialist workshop.Parking Guidance
InoperativeParking Guidance is faulty.XRestart the engine.
If the display message continues to be displayed:
XVisit a qualified specialist workshop.Parking Guidance
CanceledParking Guidance is deactivated because:
R the vehicle is skidding.
R the sensors are dirty.
R a malfunction has occurred.XReactivate Parking Guidance later.
If the parking space symbol is not displayed in the multifunction
display when you are driving at a speed of less than 19 mph
(30 km/h):
XClean the sensors ( Y page 456).XRestart the engine.
If the parking space symbol is still not displayed in the
multifunction display when you are driving at a speed of less than
19 mph (30 km/h):
XVisit a qualified specialist workshop.Parking Guidance is deactivated because you have left the lane.XPark again and, while doing so, observe the display messages
in the multifunction display.Parking Guidance
FinishedThe vehicle is parked. A warning tone also sounds.
The display message disappears automatically.DISTRONIC PLUS
OffDISTRONIC PLUS has been deactivated. If it was deactivated
automatically, a warning tone also sounds ( Y page 333).DISTRONIC PLUS
Available AgainDISTRONIC PLUS is operational again after having been
temporarily unavailable. You can now reactivate DISTRONIC PLUS
( Y page 325).Display messages405On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsDISTRONIC PLUS
Currently
Unavailable See
Oper. ManualDISTRONIC PLUS is deactivated and is temporarily inoperative if:
R the DISTRONIC PLUS cover in the radiator grill is dirty.
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 its function is impaired due to heavy rain or snow.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
A warning tone also sounds.
DISTRONIC PLUS 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 system is within the operating temperature range.
If the display message continues to be displayed:XClean the DISTRONIC PLUS cover in the radiator grill
( Y page 456).XClean the bumpers ( Y page 456).XRestart the engine.DISTRONIC PLUS
InoperativeDISTRONIC PLUS is faulty. BAS PLUS and PRE-SAFE ®
Brake may
also have failed. A warning tone also sounds.XVisit a qualified specialist workshop.DISTRONIC PLUS
OverrideYou have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.XTake your foot off the accelerator pedal.DISTRONIC PLUS
--- mphAn activation condition for DISTRONIC PLUS is not fulfilled.XCheck activation conditions for DISTRONIC PLUS
( Y page 325).406Display messagesOn-board computer and displays