Not a problem but interested. On my 2007 S6 when I open the drivers door there is a short noise which sounds very much like an electric motor actuating. My 2008 A6 didn't do it.
Yeah likely to be fuel pump as think this is pretty common for them to work this way, mine does another noise when turning ignition too but doubt it is a second pupm on a 1.9tdi compared to a v10 lol