2009 SAAB 9-3 2.0T - dropping level of coolant in reservoir

Hello, the only suggestion I have is to have the vehicle evaluated by a competent technician and shop near you. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops I have no explanation for your concern, and there are many factors and variables that can influence what's going on. I do not know that a cooling system fluid loss is related to the collapsed oil filter issue. In fact, it doesn't sound relatable.