Went to do some errand this morning and I was on the expressway for about 5 minutes when Bam I get a check engine light. Drove it to an Autozone and tried to have them pull the code, but the CEL was off. The check engine light doesn't come on when I am not on the highway? Anything I should check? Don't have a VAG-Com scanner.

 

Did a search on the internet and some experts said that it might be a bad egr valve. Took off the top cover to look at where the egr valve was located. While snooping around, I notice a vacuum line was not attach to anything. It was a vacuum line to the fuel pressure regulator on the field rail. Put it back on, but it didn't feel snug, so I took a closer look at the vacuum line. It appeared that the line was crack on both ends, looked at the other vacuum line and they were crack also. Went to my neighborhood hardware store, not those big box store like Home Repo or Lowes, because they are a family run business and they carry stuff that Home Repo and Lowes doesn't carry. Got 2 feet of 1/8" i.d and 2 feet of 3/16" id vacuum hose. The 1/8 was too small and the 3/16 was perfect. So for $1.50 got my Audi Touring (that's what the BMUU crowd calls a station wagon) running without a CEL coming on while driving the expressway.

Hope this help some other A6 owners.