Please excuse the non technical language that I may use!! Ok, the problem I have... Audi A3 2.0 TDi 54 Reg Symphony II 8L BOSE 6CD Changer Basically, each of the 6CD units seam to be extremely tempremental. I have one data CD that works in all 6 units however no other data CD works at all. Originally I put this down to the make/model of data disc so I tried an official CD. This worked in 2 out of 6 of the units. I then tried another official CD and this worked in 1 out of 6 units but it was one of the units that the first official CD didn't work in. With each CD that is input into each of the 6 units it sounds as though the unit is failing to find the start of the CD but how can it not find the start on an official CD? I just find this pretty preculiar and wondered if anyone else has experienced similar issues or if anyone can suggest a fix to this issue. Data CD: Blank disc with music written onto Official CD: CD purchased from HMV etc.. *Thought I better clarify! Thanks in advance.