[Jacket]

The fuel filter for the Q7 TDI V6 3.0 part number is Audi # 7L6 127 434 c (7L6127434c). This is same part number for the 3.0L CATA V6 Touareg engine. The fuel filter housing is also the same for the Touareg and Q7.

The filter housing is shown below on the Q7 - it's on the very right side and has a silver cylinder on the firewall coming out of it and 4 hoses. It's on the firewall side of the red hose.

What is that silver horizontal tube adjacent to the fuel filter canister?

 

[Jacket]

Mine looks like the attached picture in your post #2. I'm coming up on a service interval for the fuel filter, so I've been trying to do a bit of research to do it myself. My assumption is that I'd pull the lid off of the canister at the far right edge of your picture (with the 4 hoses coming out of the top), and replace a filter element on the inside. But I'm finding other threads that make me wonder if the silver bullet is part of the service.

And when I try to check the online parts suppliers for a diagram, I find nothing. If you search for a fuel filter though, you get a $250 part.
http://genuineaudiparts.com/parts/2...ERVICE&subgroup=FILTERS&component=FUEL FILTER

which doesn't seem to jibe with others that mention a $50 filter with a couple of gaskets. So I've got myself confused. Hoping to get more data points from the VW crowd that seems a bit more likely to be DIY.

 

[Jacket]

In the US only the 3.0 V6 TDI is available.

Thanks for the parts info. Does your ETKA source indicate what part the horizontal silver tube is?