2007 Saab 9-3 Owner's Manual - Page 210

210 Car care Coolant expansion tank, 4-cyl engine 4-cyl engine: The expansion tank is transparent to facilitate checking the coolant level. When the engine is cold, the coolant shall lie on or just above the KALT/COLD mark on the expansion tank (boundary between the upper and lower sections of the tank, see illustration). Top up with a mixture of equal parts of Saab-approved concentrated coolant and clean water. We recommend that you contact an authorised Saab workshop. If the expansion tank is empty when coolant is added, run the engine until warm so that the thermostat opens. Top up the tank again, as necessary. Coolant expansion tank, V6 engine Level markings, V6 engine 1 HOT 2 COLD V6 engine: The expansion tank is not transparent. The cap must be unscrewed so that the coolant level can be checked. When the cap is screwed off there are two level markings, HOT and COLD. When the engine is cold, the coolant shall lie on or just above the COLD mark in the expansion tank.