2008 VOLVO S40 heating

forming on the insides of the windows, especially in winter.
Timer
The timer function minimizes the risk of misting, or stale air when the recirculation function is selected. See page 77
for information on setting the recirculation timer. Recirculation is always disengaged when you select Defroster (3).
3. Defroster
Directs airflow to the windshield and side windows and increases blower speed. When the defroster is activated:
Air flows to the windows at high blower speed.
The LED in the defroster button lights up when this function is activated. The air conditioning system is controlled
to provide maximum air dehumidification.
The air conditioning is automatically switched on (can be switched off by pressing button 5).
The air is not recirculated.
4. Airflow controls
Press one of the three buttons in the illustration to activate the selected airflow. A symbol in the display above the
climate control panel and a lit LED in the selected button indicate that the manual function has been selected. With
manually selected airflow both warm and cool air can be selected. The desired temperature is selected using control 9.
5. A/C - On or Off
ON: The air conditioning system is engaged when the ON light is lit.
OFF: The system is disengaged when the OFF lights up.
If Defroster (3) is activated the air conditioning is always engaged.
6/7. Heated front seats (option)
Maximum heating: Press the button once - both LEDs light up.
Reduced heating: Press the button a second time - one LED lights up.
Seat heating off: Press the button a third time - no LEDs are lit.
8. Heated rear window and door mirrors
Press to defrost the rear window and door mirrors.
The rear window and door mirrors are defrosted simultaneously if the switch is pressed once. The defrost function is
active if the LED in the switch is illuminated.
The function can be switched off manually by pressing the button,
The defrost function switches off automatically after 12-20 minutes, depending on the outside temperature.
ProCarManuals.com

NOTE
On certain markets, the defrost function may remain on longer than 20 minutes in cold weather to help keep the rear
window free from ice or condensation.
91 03 Climate
Manual climate control
9. Temperature selector
The knob with the thermometer symbol is used to select cooling or heating for both the driver's and passenger's sides
of the car.
92 03 Climate
Electronic Climate Control (ECC) - option
1. Auto - On/Off
2. Blower speed
3. Recirculation
4. Defroster
5. Airflow controls
6. A/C - ON/OFF
7. Heated driver's seat
8. Heated front passenger's seat
9. Rear window and door mirror defrosters
ProCarManuals.com

10. Temperature selector
ECC functions
1. Auto - On/Off
The AUTO function automatically regulates climate control to maintain the desired temperature. The automatic
function controls heating, air conditioning, blower speed, recirculation, and air distribution.
If you select one or more manual functions, the remaining functions continue to be controlled automatically. All
manual settings are switched off when AUTO is switched on. AUTO CLIMATE is shown in the display.
2. Blower speed
The blower speed can be increased or decreased by turning the knob. The blower speed is regulated
93 03 Climate
Electronic Climate Control (ECC) - option
automatically if AUTO is selected. The previously set blower speed is disconnected.
NOTE
If the knob is turned counterclockwise and the blower indication in the display goes out, the blower and the air
conditioning are switched off. The display shows the blower symbol and OFF.
3. Recirculation
This function can be used to shut out exhaust fumes, smoke, etc from the passenger compartment. The air in the
passenger compartment is then recirculated, i.e. no air from outside the car is taken into the car when this function is
activated.
If the air in the car recirculates for too long, there is a risk of condensation forming on the insides of the windows,
especially in winter.
Timer
The timer function minimizes the risk of fogging, or stale air when the recirculation function is selected. See page 77
for information on setting the recirculation timer.
NOTE
Recirculation is always disengaged if the defroster button is engaged to clear ice or condensation from the side
windows.
ProCarManuals.com

4. Defroster
Directs airflow to the windshield and side windows and increases blower speed. When the defroster is activated:
Air flows to the windows at high blower speed.
The LED in the defroster button lights up when this function is activated. The air conditioning system is controlled
to provide maximum air dehumidification.
The air conditioning is automatically switched on (can be switched off by pressing button 6).
The air is not recirculated.
5. Airflow controls
Press one of the three buttons in the illustration to activate the selected airflow. A symbol in the display above the
climate control panel and a lit LED in the selected button indicate that the manual function has been selected. With
manually selected airflow both warm and cool air can be selected. See also the table on page 95
.
6. Air conditioning On/Off
ON: The air conditioning system is engaged when the ON light is lit and is controlled automatically by the system to
maintain the selected temperature.
OFF: The system is disengaged when the OFF lights up.
When OFF is selected and the OFF LED is lit, the air conditioning system is deactivated. Other functions are still
controlled automatically.
When Defroster (4) is selected, the air conditioning system is activated for maximum dehumidifying.
94 03 Climate
Electronic Climate Control (ECC) - option
7 and 8. Heated front seats (option)
Maximum heating: Press the button once - both LEDs light up.
Reduced heating: Press the button a second time -one LED lights up.
Seat heating off: Press the button a third time - no LEDs are lit.
9. Rear window and door mirror defrosters
Press to defrost the rear window and door mirrors.
The rear window and door mirrors are defrosted simultaneously if the switch is pressed once. The defrost function is
active if the LED in the switch is illuminated.
The function can be switched off manually by pressing the button.
ProCarManuals.com

When starting in cold weather, the transmission may shift up at slightly higher engine speeds than normal until the
automatic transmission fluid reaches normal operating temperature.
Do not race a cold engine immediately after starting. Oil flow may not reach some lubrication points fast enough
to prevent engine damage.
1The optional keyless drive start control does not need to be removed from the ignition switch.
137 06 Starting and driving
Starting the vehicle
WARNING
Volvo's floor mats are specially manufactured for your car. They must be firmly secured in the clips on the floor so
that they cannot slide and become trapped under the pedals on the driver's side.
CAUTION
Automatic transmission: The engine should be idling when you move the gear selector. Never accelerate until after
you feel the transmission engage! Accelerating immediately after selecting a gear will cause harsh engagement and
premature transmission wear. Selecting P or N when idling at a standstill for prolonged periods of time will help
prevent overheating of the automatic transmission fluid.
WARNING
Always place the gear selector in Park (manual transmission: first or reverse gear) and apply the parking brake
before leaving the vehicle.and apply the parking brake before leaving the vehicle. Never leave the vehicle unattended
with the engine running.
Always open garage doors fully before starting the engine inside a garage to ensure adequate ventilation. The
exhaust gases contain carbon monoxide, which is invisible and odorless but very poisonous.
138 06 Starting and driving
Starting the vehicle with keyless drive (option)
Starting a vehicle with keyless drive
ProCarManuals.com

Never tow farther than 50 miles (80 km).
Keep the tow rope taut at all times while the vehicle is in motion.
The disabled vehicle should be towed in the forward direction only.
152 06 Starting and driving
Towing
WARNING
Never allow a vehicle to be towed without a driver behind the wheel of the disabled vehicle.
Never remove the key from the ignition while the vehicle is moving. The steering wheel could lock, making it
impossible to steer the vehicle.
When the engine is not running, steering resistance and the effort needed to apply the brakes will be great.
Never attempt to tow a vehicle with a dead battery at night.
CAUTION
Check with state and local authorities before attempting this type of towing, as vehicles being towed are subject to
regulations regarding maximum towing speed, length and type of towing device, lighting, marker flags, etc.
Never attempt to push- or tow-start a vehicle with a dead battery. This would inject unburned fuel into the three-
way catalytic converter(s), causing overheating, backfiring, and damage. See page 153
for instructions on jump
starting the vehicle.
Towing vehicles with front wheel drive
Volvo recommends the use of flat bed equipment for towing vehicles with front wheel drive. If wheel lift equipment
must be used, please use extreme caution to help avoid damage to the vehicle.
In this case, the vehicle should be towed with the rear wheels on the ground if at all possible.
If it is absolutely necessary to tow the vehicle with the front wheels on the ground, please refer to the towing
information on the previous page.
Sling-type equipment applied at the front will damage radiator and air conditioning lines.
It is equally important not to use sling -type equipment at the rear or apply lifting equipment inside the rear wheels;
serious damage to the rear axle may result.
If the vehicle is being towed on a flat bed truck, the towing eyelets must not be used to secure the vehicle on the flat
bed. Consult the tow truck operator.
ProCarManuals.com

178 07 Wheels and tires
Vehicle loading
how this reduces the available cargo and luggage load capacity of your vehicle.
WARNING
Exceeding the permissible axle weight, gross vehicle weight, or any other weight rating limits can cause tire
overheating resulting in permanent deformation or catastrophic failure.
Do not use replacement tires with lower load carrying capacities than the tires that were original equipment on the
vehicle because this will lower the vehicle's GVW rating. Replacement tires with a higher limit than the originals do
not increase the vehicle's GVW rating limitations.
179 07 Wheels and tires
Uniform tire quality gradings
Uniform tire quality gradings
ALL PASSENGER VEHICLE TIRES MUST CONFORM TO FEDERAL SAFETY REQUIREMENTS IN
ADDITION TO THESE GRADES
Quality grades can be found, where applicable, on the tire sidewall between the tread shoulder and maximum
section width. For example:
Treadwear 200 Traction AA Temperature A
TREADWEAR
The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions
on a specified government test course. For example, a tire graded 150 would wear one and one half (1 1/2) times as
well on the government course as a tire graded 100. The relative performance of tires depends upon the actual
conditions of their use, however, and many depart significantly from the norm due to variation in driving habits,
maintenance practices and differences in road characteristics and climate.
TRACTION
The traction grades, from highest to lowest, are AA, A, B, and C, as measured under controlled conditions on specified
government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance. The traction
grade assigned to this tire is based on braking (straight-ahead) traction tests and is not a measure of cornering (turning)
traction.
WARNING
The traction grade assigned to this tire is based on braking (straight-ahead) traction tests and is not a measure of
cornering (turning) traction.
TEMPERATURE
The temperature grades are AA (the highest), A, B, and C, representing the tire's resistance to the generation of heat
and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive
temperature can lead to sudden tire failure. The grade C corresponds to a minimum level of performance that all
ProCarManuals.com

258 11 Specifications
Electrical system
Three-way catalytic converter - general information
Keep your engine properly tuned. Certain engine malfunctions, particularly involving the electrical, fuel or
distributor ignition systems, may cause unusually high three-way catalytic converter temperatures. Do not continue to
operate your vehicle if you detect engine misfire, noticeable loss of power or other unusual operating conditions, such
as engine overheating or backfiring. A properly tuned engine will help avoid malfunctions that could damage the three-
way catalytic converter.
Do not park your vehicle over combustible materials, such as grass or leaves, which can come into contact with the
hot exhaust system and cause such materials to ignite under certain wind and weather conditions.
Excessive starter cranking (in excess of one minute), or an intermittently firing or flooded engine can cause three-
way catalytic converter or exhaust system overheating.
Remember that tampering or unauthorized modifications to the engine, the Electronic Control Module, or the vehicle
may be illegal and can cause three-way catalytic converter or exhaust system overheating.
This includes:
- Altering fuel injection settings or components.
- Altering emission system components or location or removing components.
- Repeated use of leaded fuel.
NOTE
Unleaded fuel is required for vehicles with three-way catalytic converters.
259 11 Specifications
Volvo programs
Volvo On Call Roadside Assistance
Your new Volvo comes with a four year ON CALL roadside assistance. Additional information, features, and benefits
are described in a separate information package in your glove compartment. If you have misplaced your package, dial:
In the U.S.A. 1-800-638-6586 (1-800-63-VOLVO)
In Canada: 1-800-263-0475
ProCarManuals.com