so i have a 2003 A4 1.8Tq, and i deff. have a symphony II and i deff. have a BOSE system, the holding of preset button 1 - 4 and turning on the car work....with some wierd setting that i dont know what it is...but then i press and hold preset 5 when the radio is off then turn it on...nothing happens?? why is this and what can i do to get this secret EQ.

TIA,

Joe

 

Dont think it works with the symphony... but read through this link..

https://www.audiforums.com/m_489230/tm.htm

 

Its only for earlier model (B5) symphony radios.