Lincoln 2013 MKZ Owner's Manual page 193

Parking Aids
The system does not offer a particular space
The vehicle is farther than 6.5 ft (2.0 m) from the parking space
The vehicle is closer than 16 in. (40 cm) from neighboring parked vehicles
The transmission is in R (Reverse); the vehicle must be moving forward to
detect a parking space
The system does not position the vehicle where I want in the space
The vehicle is rolling in the opposite direction of the transmission (i.e. rolling
forward when R [Reverse] is selected)
The transmission is in R (Reverse); the vehicle must be moving forward to
detect a parking space
An irregular curb along the parking space prevents the system from aligning
the vehicle properly
Vehicles or objects bordering the space may not be positioned correctly
The vehicle was pulled too far past the parking space. The system performs
best when you drive the same distance past the parking space
The tires may not be installed or maintained correctly (i.e. not inflated correctly,
improper size, or of different sizes)
A repair or alteration has changed detection capabilities
A parked vehicle has a high attachment (i.e. salt sprayer, snowplow, moving
truck bed, etc.)
The parking space length or position of parked objects changed after your
vehicle passed
The temperature around your vehicle changes quickly (i.e. driving from a heated
garage into the cold, or after leaving a car wash)
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