Lexus GS 350 Owner's Manual page 208

206
4-4. Refueling
Opening the fuel tank cap
With the doors unlocked, press
1
the center of the rear edge of the
fuel filler door.
Push until you hear a click and take
your hand away to slightly open the
fuel filler door. Then open the door
fully by hand.
Turn the fuel tank cap slowly to
2
open.
Hang the fuel tank cap on the
3
back of the fuel filler door.