2009 BMW 328 Owner's Manual - Page 85

Deactivating HDC Press the button again; the LED goes out. HDC is automatically deactivated at speeds greater than approx. 35 mph/60 km/h. after approx. 2 seconds and the car will start to roll backwards.< Flat Tire Monitor FTM* The concept The Flat Tire Monitor detects pressure loss in a tire by comparing the rotating speeds of the individual tires while moving. In the event of pressure loss, the rolling circumference changes and, thus, the rotating speed of the affected wheel. This change is detected and is reported as a flat tire. Using HDC In cars with manual transmission: Use HDC in lower gears and in reverse gear. With automatic transmission: You can use HDC in any drive position. Displays in the instrument cluster* Functional requirement In order to assure the reliable reporting of a flat tire, the system must be initialized for the correct tire inflation pressure. The system must be reinitialized each time a tire inflation pressure has been corrected or a wheel or tire has been changed.< 1 2 Display for target speed HDC display System limitations The Flat Tire Monitor is unable to warn the driver of sudden, severe tire damage caused by external factors, nor can it identify the gradual loss of pressure that will inevitably occur in all four tires over a lengthy period of time.< In the following situations, the system could be delayed or malfunction: > System has not been initialized > Driving on snowy or slippery road surface > Performance-oriented style of driving: slip in the drive wheels, high lateral acceleration > Snow chains are attached Malfunction The HDC display disappears during HDC operation, or does not appear: HDC is temporarily unavailable due to excessive brake temperature, or DSC has failed. Drive-off assistant The drive-off assistant enables you to drive off smoothly on uphill gradients. It is not necessary to use the parking brake for this. 1. Hold the car in place by depressing the brake. 2. Release the brake and drive off without delay. The drive-off assistant holds the car in place for approx. 2 seconds after the brake is released. Drive off without delay after releasing the brake. Otherwise, the drive-off assistant will no longer hold the car in place 83 Online Edition for Part no. 01 41 2 602 099 - © 10/08 BMW AG Reference The initialization is completed during driving, which can be interrupted at any time. When driving resumes, the initialization is continued automatically. Do not initialize the system while snow chains are attached.< Mobility Initializing the system Communications Entertainment Navigation Driving tips Controls At a glance