
I N S TA L L A T I O N   I N S T R U C T I O N S
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ignition, disconnect the negative battery 
terminal before installing this product. 
Ensure that all installation connections, 
especially the air bag indicator lights, are 
plugged in before reconnecting the battery 
or cycling the ignition to test this product.
NOTE: Refer also to the instructions included 
with the aftermarket accessory before 
• Crimping tool and connectors, or solder gun, 
  solder, and heat shrink • Tape • Wire cutter
  LD-AX-SWCX-AU1  ...............................................2
  LD-AX-SWCX-AU2 ................................................3
Programming 4 .........................................................
Troubleshooting.....................................................5
Audi   Data Interface with SWC 2002-2013
•  Provides accessory power 
•  Provides illumination output
•  Provides wires for multimedia 
radios (park brake, reverse, 
•  Retains audio controls on the 
•  Designed to be compatible 
with all major radio brands
•  Auto detects vehicle type, radio 
connection, and preset controls
•  Ability to dual assign steering 
•  Retains memory settings even 
after battery disconnection or 
interface removal (non volatile 
A3  2006-2013(1) ...............................................
A4/RS 4/S4 (with NAV) 2005-2008 .................
A4/RS 4/S4 2007-2008 .....................................
A4/RS 4/S4 2006 ...............................................
TT 2008-2013  ......................................................
A3  2006-2007(2) ..............................................
A4/S4  2002-2006(3) ........................................
A6 2004 ..............................................................
Allroad 2004-2005 ............................................
TT 2002-2006 .....................................................
(1)  With either Symphony Plus or NAV radio.
(2)  With Concert radio (without NAV)
(3) With Symphony radio (without NAV)
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for more detailed information about the product  
and up-to-date vehicle specific applications