2006 Saab 9-5 Owner's Manual - Page 199

Car care and technical information The cooling system is charged at the factory with coolant containing a 45 % concentration of a combined antifreeze and corrosion inhibitor. A weaker mixture will result in reduced anticorrosion protection. For protection against freezing in very cold weather, a stronger concentration will be needed. A 60 % concentration of antifreeze will provide protection at temperatures down to -58°F (-50°C). The coolant does not normally have to be changed during the service life of the car. The type of coolant used has a reddish color and should not be mixed with other types of coolant. Saab Original coolant should be used all year round. Only use coolant approved by Saab. Note: If incorrect coolant is used or added, the life-time properties will be affected. Even if the coolant is flushed from the system and replaced with life-time coolant, life-time properties are no longer retained and the coolant must then be drained and replaced at regular intervals. 199 Brake and clutch fluid NOTICE Always mix the antifreeze with the appropriate volume of water before adding it to the cooling system. If pure antifreeze is added, the engine could still freeze and be damaged. This is because the antifreeze will not mix properly with the coolant before the thermostat has opened to allow full circulation. WARNING Brake fluid deteriorates as it becomes old. Because it is hygroscopic, it absorbs water from the air and, in time, could allow vapor to form in the brake system, thus reducing its performance. It is therefore important that brake fluid be changed regularly, as specified in the service program. Checking the fluid level The combined brake and clutch-fluid reservoir is transparent to facilitate checking of the fluid level. The level should be between the MAX and MIN marks. Top up, as necessary, with DOT 4 fluid. Do not use DOT 5 brake fluid.