2010 BMW M3 Owner's Manual - Page 241

Connecting jumper cables Connect the jumper cables in the correct order, so that no sparks which could cause injury occur.< Your BMW has a jump-starting connection in the engine compartment which acts as the battery's positive terminal, refer also to the Engine compartment overview on page 219. The cap is marked with +. 1. Pull the cap of the BMW jump-starting connection up to remove. nal of the battery or to the engine or body ground of the vehicle to be started. Starting the engine 1. Start the engine of the donor vehicle and allow it to run for a few minutes at slightly increased idle speed. 2. Start the engine on the other vehicle in the usual way. If the first start attempt is not successful, wait a few minutes before another attempt in order to allow the discharged battery to recharge. 3. Let the engines run for a few minutes. 4. Disconnect the jumper cables by reversing the above connecting sequence. If necessary, have the battery checked and recharged. Never use spray fluids to start the engine.< 3. Attach the second terminal clamp of the plus/+ jumper cable to the positive terminal of the battery or a starting-aid terminal of the vehicle to be started. 4. Attach one terminal clamp of the minus/- jumper cable to the negative terminal of the battery or to an engine or body ground of the assisting vehicle. Your BMW has a special nut as body ground or negative pole. Do not transport any passengers other than the driver in a vehicle that is being towed.< Using a tow fitting The screw-in tow fitting must always be carried in the car. It can be screwed in at the front or rear of the BMW. Sedan: it is stored in the onboard vehicle tool kit underneath the cover on the right-hand side of the cargo area, refer to page 229. Sports Wagon: it is stored in the onboard vehicle tool kit underneath the cover on the lefthand side of the cargo area, refer to page 229. Use only the tow fitting provided with the vehicle and screw it all the way in. Use the tow fitting for towing on paved roads only. Avoid lateral loading of the tow fitting, e.g. do not lift 239 Online Edition for Part no. 01 41 2 603 066 - © 08/09 BMW AG Reference 5. Attach the second terminal clamp of the minus/- jumper cable to the negative termi- Mobility Communications Entertainment 2. Attach one terminal clamp of the plus/+ jumper cable to the positive terminal of the battery or a starting-aid terminal of the vehicle providing assistance. Tow-starting, towing away Observe the applicable laws and regulations for tow-starting and towing vehicles.< Navigation Driving tips Controls At a glance