Got a 2005 A4, usual Concert problem with dodgy volume and worn buttons. Want to retain look so need to buy a replacement Concert - probably off ebay.

It's the std DIN-ish size radio/cd. There are quite a few about but do i have to get one that comes out of an A4?? I ask as I've just missed one that had come from an A2 (link blow), but whilst the buttons etc looked the same as mine, the unit itself appeared narrower and not as tall as mine in the A4??

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Are there different sizes for different models??

Cheers.