The actual fuel gage itself is not supposed to illuminate when it gets into the red zone. The red bar is not an illuminating bar. When it gets into this range a YELLOW FUEL ICON light comes on in the instrument display on the left side of the instrument cluster.

No the wing cannot be reprogrammed to my knowledge

The wind noise I had I learned to deal with but the dealer should check it out and replace weather seal just in case. But pardon i don't want to be rude, but ANY object traveling at 110 mph will have wind noise of some sort. Yes including LEXUS.

The stereo rattling your exterior mirror, both mine do that its normal especially if you have your bass setting high, its in the nature of the design, maybe its loose and they can look into it however if not it'll rattle.

The dim light on the inner switches can be 2 things:

1) Check your inner dimmer switch first and make sure its in it brightest mode

2) If the switch is in the bright mode then you might have a low battery or this could be part of the recall out by Mercedes including this engine with the voltage regulators and that can be the problem but can be easily fixed talk to your dealer. However when working properly these switches are not supposed to light up LEXUS bright like so don't expect too much when they are lit

The engine rattle after driving a while when at idle i had that and the dealer replace my lifters, rocker arms, shafts, seals twice

The dimming mechanism on the rearview mirror is not supposed to be quick. It dims at the rate the light of the vehicle behind you is shining through the sensor built in, if a car comes up on your rear-end at a high rate of speed with his lights on the sensor couldn't quite pick up quickly the light through its sensors that fast so it'll take a while for it to dim

The stereo has a MEMORY setting for both MODES: Stereo and CD.
If you set the BASS at +3 and the TREBLE at +5 while playing a CD and then switch to Stereo Mode the settings will no longer be Bass 3 and Treble 5 they will be defaulted to whatever you stored in the radio mode, however when you switch back to CD it'll be Bass +3 and Treble +5 until you change it you can store different settings for stereo and cd modes and the system will remember them everytime you switch between modes.