2006 Saab 9-5 Owner's Manual - Page 184

184 Tires Starting and driving The tire pressure should match the current load and speed of the car; for cars sold in U.S. see page 234; for cars sold in Canada see page 269. The tire pressures given apply to cold tires, that is tires that are the same temperature as the outside air temperature. The tire pressure increases as the tires become warm (e.g. during highway driving) with approximately 0.3 bar (4 psi). When the temperature of the tires changes by 50° (10°C), the tire pressure will change 0.1 bar (2 psi). Never reduce the pressure of a hot tire. If the tires are hot when you check them, only increase the pressure, if necessary. Underinflated tires wear more quickly than slightly overinflated tires. If a valve is leaking, simply unscrew it and fit a new one. Important! Remember to adjust the tire pressures if you change the load in the car or intend to drive at substantially lower or higher speeds than normal. WARNING Check the tire pressure at least once a month and before long journeys. Underinflation can result in: • Punctures • Separation of the tire and tread • Damage to the sidewalls • Damage to the rims on poor roads • Poor handling characteristics • Premature tire wear • Increased fuel consumption.