There are minor cosmetic changes to the front and rear lights which now have daytime running LEDs, the taillights extend towards the center of the trunk lid and pinch off at the license plate mount, however their shape remains rectangular compared to the more sculpted light clusters found in the 2008 Audi A5, 2009 Audi A4, and 2009 Audi Q5 (the latter three being all-new generations).
The intakes below the headlamps are inspired by the Audi RS5. The A6's six (per side) front light-emitting diode (LED) daytime running lights (DRLs) are located within the main headlamp housing, similar to RS6's placement of the LEDs (ten per side), whereas on the S6 these front LEDs (five per side) are found adjacent to the fog lamps in the lower front bumper.
The RS6, which was unveiled in April 2008, already sported the new front and rear fascias that would feature on the facelifted A6 and S6 lineup.
Also updated for 2009 is the Quattro all-wheel drive setup, which is already found on the 2008 Audi A5 and 2009 Audi A4. This new system features a 40/60 front-to-rear torque split and offers a more balanced feel, reducing the understeer that comes from 50/50 AWD platforms.
http://en.wikipedia.org/wiki/Audi_A6
