Thanks for your review, Cindy, and congrats! So even though the seat is in its uppermost position, you still feel as if it is not high enough? That's a bit odd.
I could understand if you were 4'10", but not 5'5".
Do you have a list of standard settings for all the sensors, etc?
Our Lexys came with a very long list of settings. We got to choose which setting we wanted and the dealership offered to change some to our preferences within a certain time frame. If you were not given such a list, you might want to check with the dealership about that.
My Mazda has a setting that toggles on or off the beeping noise for blindspot warnings. Lexus may be able to do the same.