Multi-function steering wheel with two blocks of buttons

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2008 Audi S4, 2008 Audi RS 4, 2008 Audi A4, 2007 Audi S4, and 2007 Audi RS 4. However, it is still accessible from the selected car via links, so may be relevant.

Removing

In vehicles with Telematics, activate Telephone/Telematics Control Module J526 → Service mode, activating/deactivating service mode.
Disconnect battery ground wire → - 27 BATTERY, STARTER, GENERATOR, CRUISE CONTROL .
Follow safety precautions for airbag systems → - 69 - PASSENGER PROTECTION - AIRBAGS, SEAT BELTS .
Remove drivers airbag → - 69 - PASSENGER PROTECTION - AIRBAGS, SEAT BELTS .

Fig 1: Identifying Electrical Connection, Screws, And Switch Unit

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical connection - 2 -.
Remove screws - 1 - and - 3 - (1 Nm).
Remove switch unit - 4 - in direction of arrow from airbag unit.

Installing

Install in reverse order.
Ensure all connections have engaged and lines lie in proper guides.