2008 Volvo C70 Owner's Manual - Page 146

BLIS has an integrated function that alerts the driver if a fault should occur with the system. For example, if one or both of the system's cameras are obscured, a message (see the table on page 162) will appear in the information display in the instrument panel. If this occurs, clean the camera lenses. If necessary, the system can be temporarily switched off (for instructions, see page 162). 160 06 Starting and driving Blind Spot Information System (BLIS)-option When does BLIS function The system functions when your vehicle is moving at speeds above 6 mph (10 km/h). When you pass another vehicle: The system reacts when you pass another vehicle at a speed of up to 6 mph (10 km/h) faster than that vehicle. When you are passed by another vehicle: The system reacts if your vehicle is passed by another vehicle at a speed of up to 43 mph (70 km/h) faster than your vehicle. WARNING BLIS does not function in sharp curves. BLIS does not function when your vehicle is backing up. If you are towing a wide trailer, this may prevent the BLIS cameras from detecting other vehicles in adjacent lanes. How BLIS functions in daylight and darkness Daylight BLIS reacts to the shape of surrounding vehicles. The system is designed to help detect motor vehicles such as cars, trucks, buses, motorcycles, etc. Darkness BLIS reacts to the headlights of surrounding vehicles. In order to be detected by BLIS, a vehicle in the blind area must have its headlights on. This means, for example, that the system will not detect a trailer without headlights that is being towed behind a car or truck.