Page 176 of 398

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.
174
Active chassis * (Four C)
Active chassis, Four-C (Continuously Controlled Chassis Concept), regulates the characteristicsof the shock absorbers so that the vehicle's driv-ing characteristics can be adjusted. There arethree settings: Comfort, Sport and Advanced.
Operation
Chassis settings
Use the buttons in the center console to change setting. The setting in use when the engine isswitched off is activated the next time the engineis started.
NOTE
This system is available on Canadian models only.
Comfort
Comfort mode offers a somewhat softer ride and the transmission shifts gears at lower rpm. Thismode is particularly suitable for long-distancehighway driving. The indicator light in the buttonwill be on when this mode is selected.
Sport
In this mode, the vehicle's body sway is reduced during cornering and steering response is moreimmediate. The transmission shifts up at higherrpm for sportier driving. The indicator light in thebutton will be on to indicate that Sport mode hasbeen selected.
Advanced
In this mode, body sway in curves is minimal and steering response is very direct. Gear shifting isdone at high rpm in each gear for dynamic andactive driving.
Related information
• Adjustable steering force
* (p. 179)
Stability system – introduction The Electronic Stability Control (ESC) system consists of a number of functions designed tohelp reduce wheel spin, counteract skidding andto generally help improve directional stability.
A pulsating sound will be audible when the system is actively operating and isnormal. Acceleration will also beslightly slower than normal.
WARNING
ESC is a supplementary aid and cannot deal with all situations or road conditions. The driver is always responsible for operating the vehicle in a safe manner in accordancewith current traffic regulations.
ESC consists of the following functions: • Traction control
• Spin control
• Active Yaw Control
• Engine Drag Control
• Corner Traction Control
• Trailer Stability Assist
Page 181 of 398

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.179
Adjustable steering force*
Steering force increases with the speed of the vehicle to give the driver enhanced sense ofcontrol and stability. At low speed the vehicle iseasy to steer in order to facilitate parking, etc.
Adjustable steering force *Steering force can be changed under MY CAR
Car settingsSteering wheel force.
Select Low, Medium or High. For a description
of the menu system, My Car – introduction (p. 77).
NOTE
This steering force level menu function can- not be accessed when the vehicle is inmotion.
NOTE
In certain situations, the power steering may become too warm and will have to be tempo-rarily cooled down. While this is happening,the power steering effect will be reducedslightly and somewhat more effort may berequired to turn the steering wheel. If this occurs, a message will be displayed in the instrument panel.
Related information
• Active chassis
* (Four C) (p. 174)
Road Sign Information (RSI) * –
introduction
RSI is a feature that helps the driver see road signs with the posted speed limit.
Introduction
Examples of readable road signs
If the vehicle passes a sign showing the speed limit, this will be displayed in the center console.
WARNING
RSI does not function in all situations and is only intended to provide supplementary infor-mation. The driver is always responsible for operating the vehicle safely.
Related information
• Road Sign Information (RSI) – operation (p. 180)
• Road Sign Information (RSI) – limitations(p. 180)
Page 305 of 398

WHEELS AND TIRES
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303
Snow chains
Snow chains can be used on your Volvo with the following restrictions:
• Snow chains should be installed on front wheels only. Use only Volvo approved snowchains.
• If accessory, aftermarket or "custom" tiresand wheels are installed and are of a size dif-ferent than the original tires and wheels,chains in some cases CANNOT be used.Sufficient clearances between chains andbrakes, suspension and body componentsmust be maintained.
• Some strap-on type chains will interfere withbrake components and therefore CANNOTbe used.
• All Wheel Drive models
: Snow chains
should only be installed on the front wheels.
• Certain size tires may not allow the assemblyof snow chains/traction devices.
Consult your Volvo retailer for additional snowchain information.
CAUTION
• Check local regulations regarding the use of snow chains before installing.
• Use single-sided snow chains only.
• Always follow the chain manufacturer'sinstallation instructions carefully. Installchains as tightly as possible andretighten periodically.
• Never exceed the chain manufacturer'sspecified maximum speed limit. (Underno circumstances should you exceed31 mph (50 km/h).
• Avoid bumps, holes or sharp turns whendriving with snow chains.
• The handling of the vehicle can beadversely affected when driving withchains. Avoid fast or sharp turns as wellas locked wheel braking.
Snow tires/studded tires 4
Owners who live in or regularly commute through areas with sustained periods of snow oricy driving conditions are strongly advised to fitsuitable winter tires to help retain the highestdegree of traction.
Tires for winter use:
• It is important to install winter tires on all four wheels to help retain traction during corner-ing, braking, and accelerating. Failure to doso could reduce traction to an unsafe level oradversely affect handling.
• Do not mix tires of different design as thiscould also negatively affect overall tire roadgrip.
• Winter tires wear more quickly on dry roadsin warm weather. They should be removedwhen the winter driving season has ended.
• Studded tires should be run-in 300 – 600 miles (500 – 1000 km) during whichthe vehicle should be driven as smoothly aspossible to give the studs the opportunity toseat properly in the tires. The tires shouldhave the same rotational direction through-out their entire lifetime.
4
Where permitted
Page 312 of 398

||
WHEELS AND TIRES
310After adjusting inflation pressure, repeat steps 1-5 above.
Related information
•
Tire Pressure Monitoring System (TPMS) –general information (p. 308)
• Tire Pressure Monitoring System (TPMS) –messages (p. 310)
• Tire Pressure Monitoring System (TPMS) –activating/deactivating (p. 310)
• Tire Pressure Monitoring System (TPMS) –changing wheels (p. 308)
• My Car – introduction (p. 77)
Tire Pressure Monitoring System (TPMS) – activating/deactivating
Activating/deactivating TPMS
(Canadian models only)
1. Switch off the engine. 2. Put the ignition in mode I or II (see Ignition
modes (p. 80) for additional information).
3. Press the MY CAR key in the center console
control panel and select
SettingsCar
settings
Tire pressure
4. Select Tire monitoring and press OK/
MENU to turn the system on or off.
Related information
•Tire Pressure Monitoring System (TPMS) – general information (p. 308)
Tire Pressure Monitoring System (TPMS) – messages
Erasing warning messagesWhen a low tire pressure warning message has been displayed and the tire pressure warning light in the instrument panell (
) has come
on:
1. Use a tire pressure gauge to check the infla- tion pressure of all four tires.
2. Re-inflate the tire(s) to the correct pressure (consult the tire pressure decal on the driv- er's door opening).
3. In certain cases, it may be necessary to drive the vehicle for several minutes at a speed of20 mph (30 km/h) or faster. This will erasethe warning text and the telltale will go out.