This will allow the user to select various modes via a button on the dash, which is fitted in the factory position. 
The driver can determine how sporty or comfortable the car is.  
Audi drive select integrates the technical components that determine the quality of the driving experience,
the engine, transmission, steering (optional), shock absorbers (optional) and the sport differential
(optional on some models).

In combination with the optional MMI, the driver can put together their own personal profile.
Audi drive select is only available in conjunction with dynamic steering,
damper control and/or sport differential.

Modes:

• Comfort   - Ideal position for relaxed driving on long or bumpy routes
• Auto        -  A balanced position
• Dynamic  -  Gives a more sporty ride, and improves engine response.
• Individual  -  Lets the user select his/hers preferred settings.
• Efficiency - This selects the most efficient mode for driving

Depending on the Spec of the car you may gain more control,
for example if the S model has the sports suspension or
Sport differential this can be adjusted, if not fitted then it can't be adjusted.
(this may differ to model and spec type)