Fuel range tends to be a bit of an issue as the tank isn't exactly massive - we don't tend to go much over 200 miles before looking for a fill up!
I've got VCDS here if yours won't talk to it to make coding changes 
Several dead easy ways to tell whether nav is HDD or DVD:
tech pack low (DVD) has a x6 disc CD changer in the dash
DVD drive for the nav disc is (I think) behind the left cover in the boot (I may be making this up!)
The main wheel for clicking through settings doesn't have a small joystick on top
Tech pack high (HDD nav) has a DVD drive (single) in the dash and x2 SD card slots behind a flap
Jukebox appears as an option under media source (you can upload music to the internal HDD)
Main wheel has the small joystick on top for moving around the map image.
There are other tell-tales, but those are the easy ones!
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===SOLD===2002 Audi S8 D2 Final Edition (yes, really) in Avus Silver with purple extended leather===SOLD===
2011 S5 Sportback in Phantom Black with black Super Sports leather, 9x20s, tech pack high, adaptive xenon plus, intelligent key, memory seats pack, sunroof, B&O, Audi Drive Select & quattro Sports Diff, DAB, parking system plus
2015 VW Golf GTI Performance Pack in Carbon Grey with black Vienna leather, tech pack (Discovery Pro nav & Dynaudio), DCC, factory towbar and retrofit RVC
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