Lexus LS460 2011 Owner's Manual page 338

2-4. Using other driving systems
 If there is a slope in the road
The assisted parking position will move left or right of the set
target parking position.
In this case, if you align the warning flag with the rear of the for-
ward parked vehicle, and the extended green line with the lower
edge of the parked vehicle's rear wheel when setting the target
parking position, the left side of your vehicle will be roughly in
line with the left side of the front parked vehicle once assisted
parking is complete. If you are parallel parking on the opposite
side of the road, left and right will be reversed.
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