2008 BMW 1 Series Owner's Manual - Page 215

Coolant Do not add coolant to the cooling system when the engine is hot. Escaping coolant can cause burns.< Coolant consists of half water and half additive. Not all commercially available additives are suitable for your BMW. Ask your BMW center for suitable additives. Only use suitable additives, otherwise engine damage may result. Because additives are harmful to your health, it is important to follow the instructions on the containers.< Comply with the appropriate environmental protection regulations when disposing of coolant additives.< Checking coolant level Navigation 213 Online Edition for Part no. 01 41 0 014 691 - © 11/07 BMW AG 1. Do not open the engine hood before the engine has cooled down. 2. Turn the cap of the expansion tank a little counterclockwise to allow any accumulated pressure to escape, then continue turning to open. 3. The coolant level is correct if it is between the maximum and minimum marks in the filler neck, refer also to the diagram next to the filler neck. 5. Turn the cap until there is an audible click. 6. Have the reason for the coolant loss eliminated as soon as possible. Reference Mobility 4. If the coolant is low, slowly add coolant up to the specified level; do not overfill. Communications Entertainment Driving tips Controls At a glance