2010 Mercury Milan Owner's Manual - Page 224

Driving CTA coverage also decreases when parking at shallow angles (refer to figure for approximate zone coverage areas [sensor obstructed to vehicle on left]). CTA detection limitations: Due to the nature of radar technology, there may be certain instances where vehicles entering and exiting the blind spot zones may not be detected. Below is a list of circumstances that may cause non detection: • Debris build up on the rear quarter panel fascias • The rear quarter panel radar beams are obstructed or partially obstructed by an adjacently parked vehicle or object. • Approaching vehicles passing at speeds greater than 15 mph (24 km/h) • Severe weather conditions • Driving in reverse faster than 3 mph (5 km/h) • Backing out of an angled parking spot CTA False Alerts Due to the nature of radar technology, there may be certain instances when the BLIS will alert with no object present when backing up. This is known as a false alert. Some level of false alerts are normal. Circumstances that may cause a false alert when backing up are backing out of a garage, backing in to a parking space, and objects very close to the sensor. False alerts are temporary and self correct. CTA and Reverse Sensing System (RSS) interaction CTA works along with the Reverse Sensing System (RSS) (if equipped). Become familiar with the warning tones of both systems. 224