2006 Saab 9-5 Owner's Manual - Page 176

176 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 1 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. Trailer hitch attachment 1 Trailer hitch attachments are available as accessories. These are designed for a maximum trailer weight of 3500 lbs. (1588 kg), see also page 261. Use only the electrical trailer hitch socket provided in the trailer hitch kit. 1 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. 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 Use only a genuine Saab trailer hitch and wiring, since other wiring methods can cause expensive damage to the car's body and electrical system. We recommend that you consult an authorized Saab dealer for guidance on how to connect the trailer hitch electrical system.