I want to buy HID bulbs, but I can't tell if I have HID headlamps (very new to this)...
 

Clearly, the bulbs that are in my car are not HID, but before I buy the right bulb (I was thinking 5000k), I want to make sure my headlamps are actaully HID in the first place. If it helps, my brights have sticker labled with "H7," but I don't see any markings on the 'regular' lights. Can anyone tell me what's actually there? Thanks in advance for the help.
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RTFM... It will answer many questions for you...

regular halogens, my friend.
 

which means if you want HIDs it's gonna be a kit like HPP's, or just a nice set of halogen bulbs like SPP's high wattage ones, or PIAA, or soemthing like that.

I'd also put some better high beams in there, I hate our cars' high beam pattern/spread.

That's what I suspected. The front end of my car was wrecked a few years ago...
 

under a previous owner, and I had a feeling that the rebuilders didn't spend the extra $ on HID's.

What country are you living in?

Re: What country are you living in?
 

Well, I'm in the U.S. and my avant is a U.S. model, but whoever rebuilt my front end decided to save some $ by not puting in new HID's.

but it's an S4? i'd bite the bullet, get ecodes, and ballasts and bulbs. may have to rewire
 

there are a few sets of ballasts and bulbs in classifieds.

I honestly have no idea what i'm doing. That said, how much do you think it would cost..
 

to do the whole thing, and how difficult of a DIY is it?

Lots for all that. Prob $1200ish

that's just wrong, i hope you got a price break factored into the car when you purchased