I have tried to fully turn the wheel to one side, removed the black cover behind the front bumper, however, I just can't removed the cover of the HID light (The cover with the 25000V warnings).

The reason I want to do it is that I want to replace the stock 4300K HID bulbs to 6000K bulbs, but now I just can't remove the cover...

Anyone can give me a help on this??

 

Just turn the cover (I believe) clock-wise... It's really easy, if you notice on the cover there's a piece of plastic that sticks out of the covers circle (that is attached to the outer side of the circle)... If it isn't clock-wise then it's counter...

Also, the stock HID's I believe are somewhere from 6100-6400K. The Kelvin you are talking about are the stock non-HID bulbs (I believe)... I recently changed mine to 10000K... I've fallen in love with that blue hue