2013 Volvo C70 Owner's Manual - Page 175

06 Starting and driving Rear park assist* Audible signals from the park assist system The Park Assist system uses an intermittent tone that pulses faster as you come close to an object, and becomes constant when you are within approximately 1 ft (30 cm) of an object behind the vehicle. If the volume of another source from the audio system is high, this will be automatically lowered. Cleaning the sensors Faults in the system If the information symbol illuminates and PARK ASSIST SERVICE REQUIRED is shown on the information display, this indicates that the system is not functioning properly and has been disengaged. Consult a Volvo retailer or authorized Volvo service technician. Park assist sensors The sensors must be cleaned regularly to ensure that they work properly. Clean them with water and a suitable car washing detergent. Ice and snow covering the sensors may cause incorrect warning signals. 06 CAUTION In certain circumstances, the park assist system may give unexpected warning signals that can be caused by external sound sources that use the same ultrasound frequencies as the system. This may include such things as the horns of other vehicles, wet tires on asphalt, pneumatic brakes, motorcycle exhaust pipes, etc. This does not indicate a fault in the system. NOTE If the sensors are obstructed by e.g., dirt, snow, or ice, this could result in false warning signals from the park assist system. * Option/accessory, for more information, see Introduction. 173