1997 Mercury Cougar Owner's Manual - Page 155

RWARNING If the parking brake is fully released, but the Brake System light remains on, have the brakes checked immediately. They may not be working properly. The parking brake system is designed for static parking only and is not designed to stop a moving vehicle, but you can use the parking brake to stop your vehicle in an emergency if the normal brakes fail. However, since the parking brake applies only the rear brakes, the stopping distance will increase greatly and the handling of your vehicle will be adversely affected. Traction-Lok Axle (If equipped) This axle provides added traction on slippery surfaces, particularly when one wheel is on a poor traction surface. Under normal conditions the Traction-Lok axle functions as a standard rear axle. Extended use of other than matching size tires on a Traction-Lok rear axle could result in a permanent reduction in effectiveness. This loss of effectiveness does not affect normal driving and should not be noticeable to the driver. RWARNING To avoid injury, never run the engine with one wheel off the ground, such as when changing a tire. 154