2003 Saab 9-5 Owner's Manual - Page 182

182 Starting and driving Maximum recommended trailer weights for different gradients Recommendations for driving in hilly terrain The following time limits are based on the capacity of the cooling system in warm weather, i.e. approximately 86°F (30°C). Gradient Maximum of hill, % trailer weight, lbs. (kg) 6-7 3300 (1500) 8-9 3300 (1500) 10-15 1870 (850) Maximum duration, minutes unlimited 15 max 15 max Trailer weight Maximum recommended trailer weights for different gradients, with a view to comfort and drivability for manual and automatic cars, are shown on the drawing. Make sure you are familiar with the law regarding speed limits for towing, maximum trailer weights, trailer-braking requirements, and also any special driving-licence provisions (see also page 259). WARNING • When towing a trailer, do not attempt to negotiate a hill having a gradient in excess of 15 %. The weight distribution over the front wheels of the car will be insufficient to prevent wheelspin, making further progress impossible. • In addition, the parking brake may not always be able to hold the car and trailer securely, with the result that the wheels can start to slide downhill. • Always apply the trailer's handbrake when unhitching it. There is otherwise a risk of personal injury or damage to the bumper should the trailer start to roll. The specified trailer weights and gradients assume that the journey starts at the hill and therefore apply only to short periods. The following time limits are based on the capacity of the cooling system in hot weather, i.e. approximately 104°F (40°C). Gradient Maximum of hill, % trailer weight, lbs. (kg) 6-7 2000 (900) 8-9 2000 (900) 10-15 1000 (450) Maximum duration, minutes unlimited 15 max 15 max.