Thanks guys.
I might be having a totally different problem to ChiLuu.
My star-stop hasn't been workings for 2 weeks now, since i brought my car back to Lexus for the safety recall.
it suddenly worked last Friday and after i used it, it is now back to "battery recharging" for 2 days.
Last time i spoke to the technician, he is suggesting that i should just drive it as usual while he is figuring out the problem. Any suggestion of what can i do? Thanks in advance