I just installed the K&N Air Filter part #33-2865 in my 2009 VW Lux CC over this past weekend, and I've got to tell you for only spending $39.99 on Amazon.com I saw a huge improvement in my car performance when accelerating and my gas mpg.
Now when I press down on my gas pedal my tubrocharged engine has no lag whatsoever that the air flow from my engine comes through my stock air intake so much faster that my CC even sounds a lot more sportier. I now enjoy driving my CC more than ever. I totally recommend this to all VW CC owners you will not regret it, and by the way it took me only 5 mins to install this and you don't have to clean this filter until 50,000 miles.
Sounds good to me ill prolly try this soon