Lexus LS 600h L 2012 Owner's Manual page 273

2-4. Using other driving systems
Driving precautions
When the grade behind the vehicle slopes up sharply, objects appear to
be farther away than they actually are.
When the grade behind the vehicle slopes down sharply, objects appear
to be closer than they actually are.
270
When any part of the vehicle sags
due to the number of passengers
or the distribution of the load,
there is a margin of error between
the set target parking position on
the screen, and the actual dis-
tance/course on the road.