2009 VOLVO XC70 snow chains

04 Comfort and driving pleasure
Stability system
04``155 Introduction
The Dynamic Stability and Traction Control
system (DSTC) consists of a number of func-
tions designed help reduce wheel spin, coun-
teract skidding, and to generally help improve
directional stability.
CAUTION
A pulsating sound will be audible when the
system is actively operating and is normal.Traction control (TC)This function is designed to help reduce wheel
spin by transferring power from a drive wheel
that begins to lose traction to the wheel on the
opposite side of the vehicle (on the same axle).
TC is most active at low speeds.
This is one of DSTC's permanent functions and
cannot be switched off.Active Yaw Control (AYC)This function helps maintain directional stabil-
ity, for example when cornering, by braking
one or more of the wheels if the vehicle shows
a tendency to skid or slide laterally.
This is one of DSTC's permanent functions and
cannot be switched off.
Spin control (SC)The spin control function is designed to help
prevent the drive wheels from spinning while
the vehicle is accelerating.
Under certain circumstances, such as when
driving with snow chains, or driving in deep
snow or loose sand, it may be advisable to
temporarily switch off this function for maxi-
mum tractive force.
WARNING
The car's handling and stability characteris-
tics will be altered if the spin control function
has been disabled.Operation
G021409
Temporarily switching off Spin control1.
Turn the thumbwheel
until the
DSTC
menu is shown.
2.
Hold down the RESET button
to toggle
between
DSTC SPIN CONTROL ON or
OFF
.
Messages in the information displayDSTC Temporarily OFF
– system function
has been temporarily reduced due to high
brake disc temperature. The function is acti-
vated automatically when the brakes have
cooled.
DSTC Service required
– the system has
been disabled due to a fault. If this occurs:
1. Stop the vehicle in a safe place and turn off
the engine.
2. Restart the engine.
If the message remains when the engine is
restarted, drive to an authorized Volvo work-
shop to have the system inspected.
Symbols in the instrument panelIf the symbols
and
are dis-
played at the same time, read the message in
the information display.

06 Maintenance and specifications
Wheels and tires
06``253
TEMPERATUREThe temperature grades are AA (the highest),
A, B, and C, representing the tire's resistance
to the generation of heat and its ability to dis-
sipate heat when tested under controlled con-
ditions 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 corre-
sponds to a minimum level of performance that
all passenger vehicle tires must meet under the
Federal Motor Safety Standard No. 109.
Grades B and A represent higher levels of per-
formance on the laboratory test wheel than the
minimum required by law.
WARNING
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, under-
inflation, or excessive loading, either sepa-
rately or in combination, can cause heat
buildup and tire failure.
Snow chains, snow tires, studded tiresSnow chainsSnow chains can be used on your Volvo with
the following restrictions:•
Snow chains should be installed on front
wheels only. Use only Volvo approved
snow chains.
•
If accessory, aftermarket or "custom" tires
and wheels are installed and are of a size
different than the original tires and wheels,
chains in some cases CANNOT be used.
Sufficient clearances between chains and
brakes, suspension and body components
must be maintained.
•
Some strap-on type chains will interfere
with brake components and therefore
CANNOT be used.
•
All Wheel Drive models: Snow chains
should only be installed on the front
wheels. Only chains adapted for AWD
models should be used.
Consult your Volvo retailer for additional snow
chain information.
CAUTION
•
Check local regulations regarding the
use of snow chains before installing.
•
Always follow the chain manufacturer's
installation instructions carefully. Install
chains as tightly as possible and
retighten periodically.
•
Never exceed the chain manufacturer's
specified maximum speed limit. (Under
no circumstances should you exceed
31 mph (50 km/h).
•
Avoid bumps, holes or sharp turns
when driving with snow chains.
•
The handling of the vehicle can be
adversely affected when driving with
chains. Avoid fast or sharp turns as well
as locked wheel braking.
Snow tires, studded tires
2
Tires for winter use:•
Owners who live in or regularly commute
through areas with sustained periods of
snow or icy driving conditions are strongly
advised to fit suitable winter tires to help
retain the highest degree of traction.
•
It is important to install winter tires on all
four wheels to help retain traction during
cornering, braking, and accelerating. Fail-
2Where permitted

07 Index
07282
RRadio
Sirius satellite radio............138, 140, 141
Radio functions........................................ 137
Rails, floor................................................ 204
Rain sensor................................................ 91
READ button............................................ 121
Rear fog light............................................. 86
Rear park assist............................... 181, 183
Rear seat entertainment (option)............. 149
Rear seats
center head restraint............................. 82
folding................................................... 81
heated................................................. 127
Rearview mirror
auto-dim function................................. 97
compass............................................. 153
Rear window defroster.............................. 97
Recalls, child restraints.............................. 44
Refrigerant............................................... 274
Refueling..........................................198, 199
fuel filler cap....................................... 200
fuel filler door...................................... 200
fuel tank volume.................................274Registering child restraints........................ 44
Remote control.......................................... 52
approach lighting.................................. 54
common functions................................ 54
immobilizer........................................... 52
key blade..................................52, 57, 59
key memory.......................................... 52
locking the vehicle................................ 54
Personal Car Communicator..........54, 55
private locking...................................... 59
replacing the battery............................. 57
unlocking the vehicle............................ 54
Reporting safety defects............................ 15
Roadside Assistance............................... 276
Roof loads................................................ 206
SSafety, occupant........................................ 14
Safety defects, reporting........................... 15
Seat belts
Automatic locking retractor/Emergency
locking retractor.................................... 34
buckling................................................ 16
maintenance......................................... 16
pretensioners........................................ 16reminder................................................ 16
reminder warning light.......................... 74
securing child restraint sys-
tems.......................................... 37, 39, 41
unbuckling............................................ 16
use during pregnancy........................... 17
using.....................................................16
Seats, front................................................ 79
Side door mirrors....................................... 96
Side impact airbags................................... 27
Side marker lights, changing bulbs......... 227
Sirius satellite radio.................. 138, 140, 141
Snow chains............................................ 253
Snow tires................................................ 253
Sound settings, audio system................. 134
Spare tire................................................. 254
Speed-dependent steering...................... 157
Spin control............................................. 155
SRS............................................................ 18
Stability system........................................ 155
indicator light........................................ 73
Starting the engine................................... 103
with keyless drive...............................104