2007 Saab 9-5 Owner's Manual - Page 174

174 Starting and driving 2 Wait until the needle has dropped back to indicate normal temperature (roughly midway, in the white zone) before stopping the engine. If the coolant needs topping up, unscrew the cap on expansion tank carefully. Top up, as necessary, ideally with a 50/50 mixture of Saab-approved coolant and water. If only water is available, use that, but remember to have the coolant mixture checked as soon as possible. Towing a trailer 3 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 parkingbrake when unhitching it. There is otherwise a risk of personal injury or damage to the bumper should the trailer start to roll. If the car has a 13-pin genuine Saab electrical socket, the trailer/caravan can be equipped with rear fog lamp and reversing lamps. The caravan can also have interior and exterior lighting when the car's ignition is off. Do not put a load on the battery for so long that it becomes discharged and the car cannot be started. There is also access to power in the caravan during a journey, the caravan battery can be charged for example. WARNING • Exercise care when opening the hood if the engine is overheated. Never remove the expansion tank cap completely when the engine is hot. • The cooling system is pressurized hot coolant and vapor can escape. These can cause injury to your eyes and burns. Open the cap slowly to release the pressure before removing it. 3 As soon as possible, have the cooling system checked by a workshop. We recommend that you contact an authorized Saab dealer. NOTICE Only use a towbar that has been approved for your car. We recommend that you entrust towbar installation to an authorized Saab workshop, which can also provide important information such as trailer weight. Your authorized Saab workshop has information on how the towbar is to be installed and whether other measures must be undertaken that could affect the cooling system or other equipment. We recommend that you consult an authorized Saab dealer for guidance on how to connect the trailer hitch electrical system. Trailer hitch attachment 3 Trailer hitch attachments are available as accessories. These are designed for a maximum trailer weight of 3500 lbs. (1588 kg), see also page 259. Use only the electrical trailer hitch socket provided in the trailer hitch kit. 3 Saab recommends: • Use a Saab original hitch kit attachment which is designed and tested by Saab. • Consult your Saab dealer regarding the appropriate hitch kit for your car.