sensor MERCEDES-BENZ S-CLASS SEDAN 2013 Service Manual

Display messages Possible causes/consequences and
M SolutionsBlind Spot Assist
Currently
Unavailable See
Oper. Manual
or
Active Blind Spot
Assist Currently
Unavailable See
Oper. Manual Blind 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:
X Clean the sensors ( Y page 467).
X Restart the engine. Blind Spot Assist
Inoperative

or
Active Blind Spot
Assist Inoperative Blind Spot Assist or Active Blind Spot Assist is defective.
The yellow
9 indicator lamps also light up in the exterior
mirrors.
X Visit a qualified specialist workshop. Parking Guidance
Inoperative Parking Guidance is malfunctioning (
Y page 350).
X Restart the engine.
If the display message continues to be displayed:
X Visit a qualified specialist workshop.412
Display messages
On-board computer and displays

Display messages Possible causes/consequences and
M SolutionsParking Guidance
Canceled Parking Guidance has been deactivated because:
R
the vehicle is skidding.
R the sensors are dirty.
R a malfunction has occurred.
X Reactivate Parking Guidance later ( Y page 350).
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
):
X Clean the sensors ( Y page 467).
X Restart 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):
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
Off DISTRONIC PLUS has been deactivated (
Y page 332). If it was
deactivated automatically, a warning tone also sounds. DISTRONIC PLUS
Available Again DISTRONIC PLUS is operational again after having been
temporarily

unavailable. You can now reactivate DISTRONIC PLUS
(Y page 332). Display messages
413
On-board computer and displays Z

Display messages Possible causes/consequences and
M SolutionsDISTRONIC PLUS
Currently
Unavailable See
Operator's Manual DISTRONIC PLUS is deactivated and is temporarily inoperative if:
R
the DISTRONIC PLUS cover in the radiator grill is dirty.
R its 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 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:
X Clean the DISTRONIC PLUS cover in the radiator grill
(Y page 467).
X Clean the bumpers ( Y page 467).
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. DISTRONIC PLUS
Override You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
X
Take your foot off 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 332).414
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M SolutionsCruise Control
Inoperative Cruise control is defective.
A warning tone also sounds.
X
Visit a qualified specialist workshop. Cruise Control
--- mph A condition for activating cruise control has not been fulfilled.
You attempted to save a speed of less than 20 mph (
30 km/h).
X If the situation allows, drive faster than 20 mph (30 km/h
) and
save the speed.
X Check the activation conditions for cruise control
(Y page 330). Tires
G
WARNING
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. G
WARNING
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. Display messages Possible causes/consequences and
M SolutionsTire pressures
Displayed After
Driving A Few
Minutes The tire pressure monitor is measuring the tire pressure.
X
Drive on.
The

tire pressures appear in the multifunction display after you
have been driving for a few minutes. Tire Pressure
Monitor
Inoperative The tire pressure monitor is defective.
X
Visit a qualified specialist workshop. Tire Pressure
Monitor
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. Display messages
415
On-board computer and displays Z

Display messages Possible causes/consequences and
M SolutionsCheck
Tires
G
Risk 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.
X Stop the vehicle without making any sudden steering or braking
maneuvers.
Pay attention to the traffic conditions as you do so.
X Correct the tire pressure (Y page 497).
X If necessary, change a wheel ( Y page 513).Caution
Tire Defect
G
Risk of accident
The tire pressure in one or more tires has dropped suddenly. The
wheel position is displayed in the multifunction display.
X Stop the vehicle without making any sudden steering or braking
maneuvers.

Pay attention to the traffic conditions as you do so.
X If necessary, change a wheel ( Y page 513).Tire Pressure
Please Rectify The tire pressure is too low in at least one of the tires or the tire
pressure difference between the wheels is too great.
X
Check the tire pressures at the next opportunity. If necessary,
correct the tire pressure ( Y page 497).
X Restart the tire pressure monitor (Y page 499). Wheel sensor(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 defective tire pressure sensor replaced at a qualified
specialist workshop. Tire Pressure
Monitor
Currently
Unavailable Due to a source of radio interference, no signals can be received
from the wheel sensors. The tire pressure monitor is temporarily
malfunctioning.
X
Drive on.
The

tire pressure monitor restarts automatically as soon as the
problem has been solved. h
Tire Press.
Warning Caution
Tire Malfunction G
Risk of accident
The tire pressure in one or more tires has dropped suddenly.
A warning tone also sounds.
X Stop the vehicle without making any sudden steering or braking
maneuvers.

Pay attention to the traffic conditions as you do so.
X If necessary, change a wheel ( Y page 513).416
Display messages
On-board computer and displays

X
Slide the seat backwards.
X To install: place the floormat in the
footwell.
X Press studs : onto retainers ;.
X To remove: pull the floormat off
retainers ;.
X Remove the floormat. Infrared reflective windshield
The infrared reflecting glass prevents the
vehicle
interior from becoming too hot. It also
blocks radio waves up into the gigahertz
range. Vehicles without Night View Assist Plus
:
Areas permeable to radio waves (to the
left and right of the rain sensor cover)
; Rain sensor cover
= Areas permeable to radio waves Vehicles with Night View Assist Plus
:
Area permeable to radio waves (to the left
of the rain sensor cover)
; Rain sensor cover
= Areas permeable to radio waves
In order to operate radio-controlled
equipment, e.g. toll recording systems,
areas : or = on the windshield are
permeable

to radio waves. In these areas, you
can install radio-controlled systems.
These areas can best be seen from outside
the vehicle by observing the light reflected off
the windshield. 454
Features
Stowing and features

X
If necessary, add coolant that has been
tested and approved by Mercedes-Benz.
X Replace cap : and turn it clockwise as far
as it will go.
For further information on coolant, see
(Y page 529).
Windshield washer system and
headlamp cleaning system The washer fluid reservoir is used for both the
windshield

washer system and the headlamp
cleaning system.
i Vehicle components and their service
products must match. You should,
therefore, only use products that have been
tested and approved by Mercedes-Benz.
Information on tested and approved
products can be obtained at any authorized
Mercedes-Benz Center or on the Internet at
http://www.mbusa.com (USA only).G
WARNING
Washer solvent/antifreeze is highly
flammable. Do not spill washer solvent/
antifreeze

on hot engine parts, because it may
ignite and burn. You could be seriously
burned.
! At temperatures below freezing: always
fill the washer fluid reservoir with a mix of
water and windshield washer concentrate
(e.g. MB WinterFit). There is otherwise a
risk of damaging the windshield washer
system/headlamp cleaning system.
! Only use washer fluid concentrate which
is suitable for plastic lenses. Unsuitable
washer fluid concentrate could damage the
plastic lenses of the headlamps.
! Do not add distilled or de-ionized water to
the washer fluid container. Otherwise, the
level sensor may be damaged.
i Add windshield washer concentrate, e.g.
MB SummerFit, to the washer fluid all year
round. Example: washer fluid reservoir
X
Mix the windshield washer fluid in a
container beforehand.
X At temperatures above freezing: fill the
washer fluid reservoir with a mix of water
and windshield washer concentrate (e.g.
MB SummerFit).
X At temperatures below freezing: fill the
washer fluid reservoir with a mix of water
and windshield washer concentrate (e.g.
MB

WinterFit). Adapt the mixing ratio to the
outside temperature. For information on
the mixing ratio (Y page 529).
X To open: pull cap : upwards by the tab.
X Add the premixed washer fluid.
X To close:
press cap : onto the filler neck
until it engages.
Brake fluid level !
If you notice that the brake fluid level in
the brake fluid reservoir has fallen to the
MIN mark or less, check the brake system
immediately for leaks. Also check the
thickness of the brake linings. Contact a
qualified specialist workshop, e.g. an
authorized Mercedes-Benz Center
immediately.
Do not add brake fluid. This does not
correct the error.
Only check the brake fluid level when the
vehicle is stationary and on a level surface. Engine compartment
461
Maintenance and care Z

Cleaning the sensors
X
Clean sensors : of the driving systems
with water, car shampoo and a soft cloth.
! When cleaning the sensors with a power
washer, maintain a distance between the
vehicle
and the nozzle of the power washer
of at least 11.8 in (30 cm). Information
about the correct distance is available from
the equipment manufacturer.
Cleaning the rear view camera X
Use clear water and a soft cloth to clean
camera lens :.
! Do
not clean the camera lens and the area
around the rear view camera with a power
washer. Cleaning the exhaust tail pipes Impurities combined with the effects of road
grit

and corrosive environmental factors may
cause flash rust to form on the surface. You
can restore the original shine of the exhaust
tail pipe by cleaning it regularly, especially in
winter and after washing.
! Do not clean the exhaust tail pipes with
alkaline-based cleaning agents, such as
wheel cleaner.
X Clean the exhaust tail pipes with a chrome
care product tested and approved by
Mercedes-Benz. Interior care
Cleaning the display X
Before cleaning the display, make sure that
it is switched off and has cooled down.
X Clean the display surface using a
commercially-available microfiber cloth
and TFT/LCD display cleaner.
X Dry the display surface using a dry
microfiber cloth.
! For cleaning, do not use any of the
following:
R alcohol-based thinner or gasoline
R abrasive cleaning agents
R commercially-available household
cleaning agents
These

may damage the display surface. Do
not put pressure on the display surface
when cleaning. This could lead to
irreparable damage to the display.
Cleaning Night View Assist Plus !
Never clean the camera lens. When
cleaning the field of vision of the driving
systems, make sure that you do not spray
glass cleaner on the camera lens. If the
camera lens is dirty, visit a qualified
specialist workshop. Care
467
Maintenance and care Z

light-alloy wheel. Using other wheel bolts
when fitting the "Minispare" emergency
spare wheel with light-alloy wheel could
damage the brake system.
Always use wheel bolts
; to fit the
"Minispare" emergency spare wheel with
steel wheel. Using other wheels when
fitting the "Minispare" emergency spare
wheel with steel wheel could damage the
brake system.
X Clean the wheel and wheel hub contact
surfaces.
! To prevent damage to the paintwork, hold
the wheel securely against the wheel hub
while screwing in the first wheel bolt. X
Slide the emergency spare wheel onto the
alignment bolt and push it on.
X Tighten the wheel bolts until they are
finger-tight.
X Unscrew the alignment bolt.
X Tighten the last wheel bolt until it is finger-
tight.
Lowering the vehicle X
Turn the crank of the jack counter-
clockwise until the vehicle is once again
standing firmly on the ground.
X Place the jack to one side. X
Tighten the wheel bolts evenly in a
crosswise pattern in the sequence
indicated ( :

to A). The tightening torque
must be 110 lb-ft (150 Nm). G
WARNING
Have the tightening torque checked
immediately after a wheel is changed. The
wheels could come loose if they are not
tightened to a torque of 110 lb/ft
(150 Nm).
X Turn the jack back to its initial position and
store it together with the rest of the tire-
change tool kit in the stowage well under
the trunk floor.
i When
you are driving with the emergency
spare wheel mounted, the tire pressure
monitoring system cannot function
reliably. Only restart the tire pressure
monitoring system when the defective
wheel has been replaced with a new wheel.
All mounted wheels must be equipped with
functioning sensors and the defective
wheel should no longer be in the vehicle. MOExtended tires (tires with run-flat
properties)
MOExtended tires (tires with run-flat
properties)

allow you to continue driving your
vehicle even if one or more tires are entirely
deflated.
MOExtended tires may only be used in
conjunction with the activated tire pressure Flat tire
477
Breakdown assistance Z

Checking the tire pressures
Important safety notes G
WARNING
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.
Do not overload the tires by exceeding the
specified load limit as indicated on the Tire
and Loading Information placard on the
driver's door B-pillar. Overloading the tires
can overheat them, possibly causing a
blowout. Overloading the tires can also result
in handling or steering problems, or brake
failure.
Check the tire pressure at least once a month.
Only check and correct tire pressures when
the tires are cold ( Y page 493).
Checking tire pressure manually To determine and set the correct tire
pressure, proceed as follows:
X
Remove the valve cap of the tire that is to
be checked.
X Press the tire pressure gauge securely onto
the valve.
X Read the tire pressure and compare it with
the recommended value on the Tire and
Loading Information placard on the
B-pillar

on the driver's side of your vehicle.
X If necessary, increase the tire pressure to
the recommended value ( Y page 493).
X If the tire pressure is too high, release air
by

pressing down the metal pin in the valve
using the tip of a pen, for example. Then check the tire pressure again using the tire
pressure gauge.
X Screw the valve cap onto the valve.
X Repeat these steps for the other tires. Tire pressure monitor
Important safety notes If a tire pressure monitor system is installed,
the vehicle's wheels have sensors that
monitor

the tire pressures in all four tires. The
tire pressure monitor warns you when the
pressure drops in one or more of the tires. The
tire pressure monitor only functions if the
correct wheel electronics units are installed
on all wheels.
The tire pressure monitor has a yellow
warning lamp in the instrument cluster for
indicating pressure loss/malfunctions (USA)
or pressure loss (Canada). Whether the
warning lamp flashes or lights up indicates
whether a tire pressure is too low or the tire
pressure monitoring system is
malfunctioning:
R if the warning lamp is lit continuously, the
tire pressure on one or more tires is
significantly too low. The tire pressure
monitor is not malfunctioning.
R USA only: if the warning lamp flashes for
60 seconds and then remains lit constantly,
the tire pressure monitor is malfunctioning. G
WARNING
Each tire, including the spare (if provided),
should be checked at least once a month
when cold and inflated to the pressure
recommended 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
Information placard or the tire pressure label,
you should determine the proper tire pressure
for those tires. Tire pressure
497
Wheels and tires
Z