Lexus GS300 1998 Owner's Manual page 198

CAUTION
D Do not start the vehicle while the adjustments are being
made.
D Take care not to select the wrong button, or the seat could
strike the rear passenger or hit your body against the
steering wheel. If this happens, you can stop the movement
by pressing another driving position memory switch, or
depressing the brake pedal.
COMFORT ADJUSTMENT
185