tire damage.
Wear indicator 
The tires have a  so-called "wear indicator" in the form  of a  number of narrow strips running across or parallel to the
tread. When approx. 1/16" (1.6 mm) is left on the tread, these strips become visible and  indicate that the tire should be
replaced.  
Tires with less than 1/16" (1.6 mm) tread have a  very poor grip in rain or snow. 
When replacing worn tires, it is recommended that the tire be  identical  in type (radial)  and  size as the one  being
replaced.  Using a  tire of the same make (manufacturer) will prevent alteration of the driving characteristics of the
vehicle.
To improve tire economy:
 Maintain correct tire pressure. See  the tire pressure label  on the inside of the fuel filler  door.
 Drive smoothly:  avoid fast  starts, hard braking and  tire screeching.
 Tire wear  increases with speed.
 Correct front  wheel alignment is very important.
 Unbalanced wheels impair tire economy and  driving comfort.
 If the wheels are rotated, they should be  kept on the same side of the car so that they revolve in the same direction
as prior  to rotation.
 Hitting curbs or potholes can damage the tires and/or wheels permanently.
Flat spots  
All tires become warm during use. After cooling, when the vehicle is parked, the tires have a  tendency to distort
slightly,  forming flat spots. These flat spots can cause vibrations similar to the vibrations caused by unbalanced wheels.
They do, however,  disappear when the tire warms up. The degree to which  flat spots form  depends on the type of cord
used in the tire. Remember that, in cold weather, it takes longer for the tire to warm up and  consequently longer for the
flat spot to disappear.
pg. 81 Wheels and tires
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 snow chains.
 Snow chains may only be  mounted on approved snow tires 185/65 R15. Consult your Volvo retailer. 
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. 
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 that limit
be  higher than 30 mph (45 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.
ProCarManuals.com 
Folding rear seat (sedan)55
Folding rear seat55
Front seats47,48
Front seats  - heated32
Front suspension124
Fuel filter110
Fuel system110, 112,124
Fuel tank cover - opening63
Fuse box, Passenger compartment96
Fuses95,96,97
Fuses in engine compartment97
G
Gas tank cover - opening63
Generator126
H
Hand brake32
Handling59
Hazard  warning flashers26
Headlight  bulbs, replacing90
Heated front  seats32
Heating37
Heating and  air conditioning35
Home  Safe lighting25
Hood53
I
IC system10
Ignition switch26
Immobilizer  (start inhibitor)40
Instruments18,19
Integrated booster  cushion11
ISOFIX fasteners12
J
Jack86
Jack (sedan)57
Jump starting72
K
Keyless entry system41
Keylock65
Keys40,41
Kick -down67
L
Label information108
Locks42
Long distance trips75
ProCarManuals.com