BMW’s flagship, the large and luxurious 7 Series, was extensively revised for the 2006 model year, therefore changes are few for 2007. “Comfort seats,” heated front seats, and power-folding exterior rear-view mirrors have become standard on all 7 Series sedans, and membership in BMW Assist, a roadside and vehicle maintenance program, expands to four years. Audio systems now include auxiliary input jacks for iPods or MP3 players.