You're looking at the plate on the drivers side door post, right? Those numbers are the Gross Vehicle Weight Rating (GVWR), not the weight of the vehicle itself. GVWR is the maximum total weight of the vehicle and its maximum payload. In the case of your 124 wagon, it is rated to carry 1100 pounds. So take that much off the number to approximate the weight of the car - 3750lbs - about right for a 124 wagon.