Convenience features leave me a bit unimpressed, considering the high cost. Mostly manual seat adjustments, no steering wheel audio controls, and a really annoying radio electronic lockout feature. With diesel fuel now up to 30% higher than normal gas, the fuel economy advantage is questionable. Given a 30% price diff, if you get 45 mpg, a 35 mpg gas burner costs you pretty close the same. You need to use an expensive specialty motor oil. Clean diesel? I can sniff a tiny whiff of diesel exhaust as I am driving, so folks with respiratory issues may want to pay very careful attention to this during a test-drive. (Maybe some residue on the engine that will burn off eventually.)
Sunroof. Manual shifter. Allow wheels. Nice graphite blue color. The 2009 Jettas now have a timing chain instead of a timing belt. Fun to drive.
Add steering wheel radio controls. Do away with radio lock-out. Make iPod controls standard.