First, you need to make sure that your Saab 9-7X has a 2 inch trailer hitch receiver. Weight distribution can only be used with a 2 inch trailer hitch.
When choosing a weight distribution system, you will need to go by the tongue weight of the trailer when loaded and ready to tow and then add the the weight of anything loaded behind the rear axle of the tow vehicle.
The Reese Steadi-Flex system, # 66557, would be good for a Coleman pop-up camper as long as the tongue weight is between... view full answer...