1996 Mercury Sable Owner's Manual - Page 241

RWARNING Do not tow a trailer when the temporary spare tire is being used. Tire failure, loss of vehicle control, and possible injury to vehicle occupants could result. Ten to 15% of the loaded trailer's weight should be on the tongue. However, the tongue load should never exceed 10% of the maximum weight that your vehicle can safely tow. Preparing to Tow For your safety and for the good of your vehicle, use the right equipment for the type of trailer you tow. Also, make sure that all towing equipment is properly attached to your vehicle. If you are not certain that you are using the right equipment in the proper manner, see your Ford or Lincoln-Mercury dealer. Do not use hitches that clamp onto your vehicle's bumper. The bumper is not designed to bear the load. Using the hitch Your vehicle uses a load carrying hitch. Because this type of hitch places the tongue load of a trailer on the rear wheels of your vehicle, you must distribute the load in your trailer so that 10 to 15% of the total weight of the trailer is on the tongue. Tie down the load so that it does not shift and change the weight on the hitch. This will prevent damage to your vehicle and make your vehicle easier to handle. 214