Lexus RX300 Manual page 140

By repeating these two steps and pressing the remaining button, the
driving position for another driver can be recorded.
To set a new memorized position, select the desired position and
perform step 2. The previous memory will be erased and the new
position will be set.
To make only slight changes to an already memorized position, the
easiest way is to first activate the memorized position, then make the
desired changes and perform step 2 above.
Activating a memorized position
16R059a
When you push button "1" or "2", the driving position will be
automatically adjusted to the position recorded for that button.
COMFORT ADJUSTMENT
Conditions for memorized position activation
D Ignition key "ON" and shift lever in "P" position
All parts of the memorized positions can be activated.
However, if the brake pedal is being depressed, the seat position
will not change.
D Key not in ignition switch and within 30 seconds of opening
driver's door.
The memorized position can be activated.
If any driving position memory switch is pushed while one of the
memorized driving position profiles is being activated, the operation
will stop.
To activate the system, push the desired button ("1" or "2") again.
The driving position memory control system cannot be operated
while the vehicle is moving.
If the vehicle's battery is disconnected, the computer's memory will
be erased and the memorized positions will have to be set again.
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