The standard headlights are dull and yellow anyway, there are many replacement lens kits you can get from e-bay or Yahoo JP that make a huge difference.
Also make sure the levelling of them is correct by playing with the level adjusters in the frunk.
As for the dash, it is also quite dull and you can only really tell the lights are on at night time.
Make sure the brightness is up full, there should be a dial on the RHS of the dash box.
As for the volt meter, mine does that as well, has never been an issue.
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