2015 DB9 ... after 3 weeks at the dealership it was back recently. I drove some 170miles today. After parking in the driveway I noticed a strange black pipe almost touching the ground. I took a closer look and noticed whatever is down there seems to have lowered. Can somebody check their DB9 and post back please.

 

Yes, I have the same tube that is approximately 1 inch long. It appears to be a vent tube. Could they have replaced the tube and not trimmed it? The tube on mine has brownish road grime on it. The tube in the photo looks new.

 

I believe that is the tube that runs from the drain hole around the gas cap, its so low as to not drip fuel on your hot exhaust probably

 

My Vantage has the same tube but not as long.
No grime on, maybe because Florida car, and end right at the frame height.

This is the drain from under the gas cap, I had to remove it to install the VAP springs.