*Audi A3 8P1 + Bose Sound System* Wiring Harness/Adapter Help?

[Persian]

Hey guys,

Just need quick help on which wiring harness would work for me?
A3 8P 2004 '54' with Symphony II (Double Din Tape+CD) which comes with Bose sound system (sub+amp in boot)?

I have contacted 2 eBayers, and they have recommended me the following:

Audi A3 A4 A6 A8 Allroad Amplified Wiring Harness ISO Lead to RCA PC9-410 | eBay

AUDI A3 A4 A6 WITH BOSE CAR WIRING HARNESS LEAD PC9-408 | eBay

Really would appreciate some help,
Cheers (Happy New Year)

 

[AndyMac]

You can use either, though the PC9-410 is the best one providing the new HU has front & rear pre-outs
The 408 uses a nasty hi-low converter that runs off the speaker outputs, rather than the existing pre-outs, and will usually cause hiss and interference

 

[Persian]

You can use either, though the PC9-410 is the best one providing the new HU has front & rear pre-outs
The 408 uses a nasty hi-low converter that runs off the speaker outputs, rather than the existing pre-outs, and will usually cause hiss and interference

Thanks Andy, appreciate the help would stick to the PC9-410 then.