I replaced my HID bulbs this weekend on my 2011 Touareg using the steps above. After completing this job I would highly recommend anyone who wants to do this to invest in a very small ratchet that uses bits, as there is significant clearance issues for reaching the torx screws closest to the inner fender. I used this from Canadian Tire:
www.canadiantire.ca
I would also recommend taking a picture of the old bulb prior to taking it out as you need to put the new bulb in a specific orientation, and it saves you a lots of guess work if you already know which position to push the new bulb in and then the direction to turn. For the passenger side, definitely take the air intake box out. This allows you to swing the rear project housing hatch out to give you access to the bulb. It is fairly easy to take out, I would say putting it back in is the harder part, but all in all for an inexperienced person like myself it took about 15 mins.
I purchased my replacement bulbs from HIDconcepts.com which was a great experience, you have a bunch of options to choose from. I ended up replacing the stock xenon bulbs with the Phillips Xtreme Vision Gen 2 5000K. They are supposed to be 150% brighter then OEM. I find the colour of light to be very white (even more so then stock) if that what you are aiming for.
Mastercraft Bit Wrench Set, 29-pc | Canadian Tire
Mastercraft Bit Wrench Set features a 60-tooth ratchet that needs as little as 6° of sweep to move fastener | Canadian Tire

I would also recommend taking a picture of the old bulb prior to taking it out as you need to put the new bulb in a specific orientation, and it saves you a lots of guess work if you already know which position to push the new bulb in and then the direction to turn. For the passenger side, definitely take the air intake box out. This allows you to swing the rear project housing hatch out to give you access to the bulb. It is fairly easy to take out, I would say putting it back in is the harder part, but all in all for an inexperienced person like myself it took about 15 mins.
I purchased my replacement bulbs from HIDconcepts.com which was a great experience, you have a bunch of options to choose from. I ended up replacing the stock xenon bulbs with the Phillips Xtreme Vision Gen 2 5000K. They are supposed to be 150% brighter then OEM. I find the colour of light to be very white (even more so then stock) if that what you are aiming for.