2006 BMW 6 Series Owner's Manual - Page 89

Technology for comfort, convenience and safety Dynamic Drive* The concept Dynamic Drive minimizes body roll and optimizes vehicle stability during cornering and evasive maneuvers. Dynamic Drive is based on active stabilizers on the front and rear axles. Suspension compliance adapts to suit driving conditions, varying from performance-oriented during cornering to smooth and comfort-oriented when the vehicle is proceeding in a straight line. During vehicle operation, the system continuously runs through closed-loop control cycles lasting only fractions of a second. The system assumes operational status each time you start the engine. Flat Tire Monitor FTM The concept The Flat Tire Monitor keeps track of the inflation pressures in the tires as you drive. The system provides an alert whenever the inflation pressure drops significantly in relation to the pressure in another tire. In the event of a pressure loss, the rolling radius and therefore the rotation speed of the wheels change. This change is detected and signaled as a flat tire. Functional requirement To ensure the reliable signaling of a flat tire, the system must be initialized at the correct tire inflation pressure. The initialization must be repeated after every correction of the tire inflation pressure and after every tire or wheel change.< Malfunction The warning lamp lights up yellow and a message is shown on the Control Display. There is a malfunction in the system. Have the system checked as soon as possible. If a malfunction occurs, please remember to adapt your speed accordingly, especially in curves. The suspension will be noticeably softer and the vehicle will display a greater tendency to tilt during cornering and in crosswinds. If a message stating that you should stop is shown on the Control Display, stop at a suitable location and switch off the engine as soon as possible. In this case the oil level in the reservoir may have dropped below the minimum, possibly owing to a leak in the hydraulic system. Do not continue driving, but instead contact your BMW center.< System limits The Flat Tire Monitor cannot indicate sudden severe tire damage caused by outside factors and does not detect a natural, even pressure drop in all four tires.< In the following situations, the system could be delayed or malfunction: > System has not been initialized > Driving on snow-covered or slippery roads > Sporty driving style: slip in the drive wheels, high lateral acceleration > Driving with snow chains* Initializing system The initialization finishes during driving, which can be interrupted at any time. When driving resumes, the initialization is automatically continued. Do not initialize the system when driving with snow chains*.< iDrive, for principle details, refer to page 16. 88 Online Edition for Part-No. 01 41 0 159 709 © 09/05 BMW AG