2008 VOLVO S80 brake sensor

2. Brake support
This helps the driver brake efficiently in a critical situation.
3. Auto-brake
This function brakes the vehicle automatically if a collision cannot be avoided.
WARNING
The auto-brake function cannot prevent a collision but is instead intended to reduce speed at the moment of impact.
For full braking effect, the driver must apply the brakes.
WARNING
The collision warning system does not work in all driving situations, and traffic, weather and road conditions.
Warnings are only provided when the risk of collision is high. The Function section provides information about
limitations that the driver must be aware of before use.
Never wait for a collision warning. This system is designed to be a supplementary driving aid. It is not, however,
intended to replace the driver's attention and judgement. The driver is responsible for maintaining a safe distance and
speed, even when the collision warning system is in use.
Maintenance of the collision warning system components must only be performed by a trained and qualified
Volvo technician.
Function
Visual warning signal, collision risk
Radar sensor
Camera
Collision warning
The radar sensor and the camera work together to detect stationary vehicles and vehicles that are moving in the same
direction as your vehicle. If there is a risk of collision, the driver is alerted by a flashing red warning light and an
audible warning signal. Collision warning is active at speeds above 5 mph (7 km/h).
167 04 Comfort and driving pleasure
Collision Warning with Auto-brake (option)
Brake support
If the risk of collision continues to increase after the collision warning has been given, brake support is activated.

Checking settings
The current Collision Warning settings can be checked by going into the menu system at
168 04 Comfort and driving pleasure
Collision Warning with Auto-brake (option)
Car settings Collision warning settings. See page 122 for more information on the menu system.
Limitations
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight ahead
may make the visual warning signal in the windshield difficult to see. For this reason, always activate the audible
warning signal in such conditions.
NOTE
The visual warning signal may be temporarily disengaged in the event of high passenger compartment temperature
due to strong sunlight, etc. If this occurs, the audible warning signal will be used, even if it has been deactivated in
the menu system.
Warnings may not appear if the distance to the vehicle ahead is very small or if steering wheel and pedal movements
are great, for example, due to a very active driving style.
WARNING
In certain situations, the system cannot provide warnings or warning may be delayed if traffic conditions or other
external factors make it impossible for the radar sensor or camera to detect the vehicle ahead.
Warnings may not be provided if the distance to the vehicle ahead is short, or if movements of the steering
wheel/brake pedal are great, such as during active driving.
The sensor system has a limited range for stationary or slow-moving vehicles and may therefore give delayed or
no warnings if your vehicle's speed is above approximately 45 mph (70 km/h).
Warnings for stationary or slow-moving vehicles may not be provided in dark conditions.
The Collision Warning system uses the same radar sensors as Adaptive Cruise Control. For more information on the
radar sensor and its limitations, see page 160
.
If no warning is given, or if a warning is delayed, Auto-brake will also not be provided or will be delayed.
NOTE
If warnings are given too frequently, the warning distance can be reduced (see "Setting a warning distance" on page
167). This causes the system to provide later warnings, which decreases the total number of warnings provided.
The camera's limitations
The camera is used by Collision Warning with Auto-brake, Driver Alert Control (see page 171
), and Lane Departure
Warning (see page 174
).
NOTE
Keep the section of the windshield in front of the camera clean and free of ice, snow, or condensation.

This system is available in the rear bumper only, or in both the front and rear bumpers.
Park assist utilizes four ultrasound sensors in the bumper(s) to measure the distance to a vehicle, object, or a person
who may be close to the front or rear of your vehicle. An audible signal and symbols in the audio system's display
indicate the distance to the object.
WARNING
Park Assist is an information system, NOT a safety system. This system is designed to be a supplementary aid when
parking the vehicle. It is not, however, intended to replace the driver's attention and judgement.
Function
Park assist is activated automatically when the vehicle is started. The indicator light in the button in the center console
illuminates when the system is on.
The front park assist system is active from the time the engine is started until the vehicle exceeds a speed of
approximately 10 mph (15 km/h). It is also active when the vehicle is backing up.
Rear park assist is active when the engine is running and reverse gear has been selected.
Activating/deactivating
The system is activated automatically when the vehicle is started.
Press the Park assist button on the center console to temporarily deactivate the system(s). The indicator light in the
button will go out when the system has been deactivated.
Park assist will be automatically reactivated the next time the engine is started, or if the button is pressed (the
indicator light in the button will illuminate).
NOTE
Front park assist is disengaged automatically when the parking brake is applied.
If the vehicle is equipped with front and rear park assist, both systems will be deactivated by pressing the button.
177 04 Comfort and driving pleasure
Park assist (option)
Signals from the park assist system

178 04 Comfort and driving pleasure
Park assist (option)
Front park assist
The distance monitored in front of the vehicle is approximately 2.5 ft (0.8 m). The audible signal comes from the audio
system's front speakers.
It may not be possible to combine auxiliary headlights and front park assist since these lights could trigger the system's
sensors.
Faults in the system
If the information symbol illuminates and Park Assist syst Service required is shown on the information display, this
indicates that the system is not functioning properly and has been disengaged. Consult a trained and qualified Volvo
service technician.
CAUTION
In certain circumstances, the park assist system may give unexpected warning signals that can be caused by external
sound sources that use the same ultrasound frequencies as the system. This may include such things as the horns of
other vehicles, wet tires on asphalt, pneumatic brakes, motorcycle exhaust pipes, etc. This does not indicate a fault in
the system.
Cleaning the sensors
The sensors must be cleaned regularly to ensure that they work properly. Clean them with water and a suitable car
washing detergent.
Ice and snow covering the sensors may cause incorrect warning signals.

Dirt, snow, etc., on the headlights can reduce lighting capacity considerably. Clean the headlights regularly, for
example when refueling.
When washing or steam cleaning the engine, avoid spraying water or steam directly on the electrical components
or toward the rear side of the engine. Special moonroof cautions:
Always close the moonroof and sun shade before washing your vehicle.
Never use abrasive cleaning agents on the moonroof.
Never use wax on the rubber seals around the moonroof.
Exterior components
Volvo recommends the use of special cleaning products, available at your Volvo retailer, for cleaning colored plastic,
rubber, or ornamental components such as chromed strips on the exterior of your vehicle. The instructions for using
these products should be followed
263 06 Maintenance and specifications
Vehicle care
carefully. Solvents or stain removers should not be used.
CAUTION
Avoid waxing or polishing plastic or rubber components
Polishing chromed strips can wear away or damage the surface
Polishes containing abrasive substances should not be used
Automatic car wash
We do NOT recommend washing your car in an automatic wash during the first six months (because the paint will
not have hardened sufficiently).
An automatic wash is a simple and quick way to clean your car, but it is worth remembering that it may not be as
thorough as when you yourself go over the car with sponge and water. Keeping the underbody clean is most important,
especially in the winter. Some automatic washers do not have facilities for washing the underbody.
CAUTION
Before driving into an automatic car wash, turn off the optional rain sensor to avoid damaging the windshield
wipers.
Make sure that side view mirrors, auxiliary lamps, etc, are secure, and that any antenna(s) are retracted or
removed. Otherwise there is risk of the machine dislodging them.
Chromed wheels : Clean chrome-plated wheels using the same detergents used for the body of the vehicle.
Aggressive wheel-cleaning agents can permanently stain chrome-plated wheels.
WARNING
When the vehicle is driven immediately after being washed, apply the brakes, including the parking brake, several
times in order to remove any moisture from the brake linings.
Engine cleaning agents should not be used when the engine is warm. This constitutes a fire risk.
Exterior lighting
Condensation may form temporarily on the inside of the lenses of exterior lights such as headlights, fog lights, or
taillights. This is normal and the lights are designed to withstand moisture. Normally, condensation will dissipate after

Locks, child safety48
Long loads, ski hatch199
Low beams89
Low fuel level warning light76
Low oil pressure warning light76
M
Main instrument panel124-125
Maintenance208
performed by the owner209
Malfunction indicator light 75
Manual parking brake115
Menu system122
overview123
Messages in the instrument panel 124-125
Mirrors


defroster 100
power door99
rearview, auto-dim function100
retractable99
vanity185
Moonroof 101-102
Motor oil


checking 210
specifications272
volumes274
O
Occupant safety 14
Occupant weight sensor22-24
Octane ratings193
Octane recommendations193
Odometer, trip78
Oil


checking 212
low pressure warning light76
specifications272
volumes274
On Call Roadside Assistance 277
Opening the trunk from the inside65
Overhead courtesy lighting93-94
Overheating, engine77
Oxygen sensors, heated197
P
Pacemaker (keyless drive warning)62
Paint, touching up266

Panic alarm55
Park assist176-178
Parking brake


electric, applying/releasing 116
manual, applying/releasing115
warning light76
Parking lights 90
changing bulbs217- 218
Personal Car Communicator, unique functions55-56
Power front seat


memory function 83
with keyless drive84
Power mirrors 99
defroster100
Power moonroof 101-102
Power steering


fluid 215
, 275
speed-dependent153
Power windows 97
laminated glass98
Pregnancy, using seat belts during 17
Proposition 65 warning9, 109, 228, 276
R
Radio


functions 141
Sirius satellite radio143- 146
Rain sensor95
READ button124-125
Rear fog light91
Rear park assist176-178
Rear seats


center head restraint 85
folding85
heated129
lowering outboard head restraints86
Rear window defroster 100
Rearview mirror


auto-dim function 100
compass149
Recall, child restraints 44
Refrigerant275
Refueling192-193
fuel filler cap196
fuel filler door194