I've bought the below stereo and this wiring kit.
https://www.ebay.co.uk/itm/BMW-Z4-E85-E86-2002-2008-Car-Stereo-Radio-Fascia-ISO-Aerial-Fitting-Kit-CT24BM06-/251548256641?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l6249&mkrid=710-127635-2958-0

I've just fitted the stereo and no sound.
I have steering wheel controls (would like to use them) and the 10 speaker system. Please can someone tell me what I have done wrong?
https://www.ebay.co.uk/itm/BMW-Z4-E85-E86-2002-2008-Car-Stereo-Radio-Fascia-ISO-Aerial-Fitting-Kit-CT24BM06-/251548256641?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l6249&mkrid=710-127635-2958-0

I've just fitted the stereo and no sound.

I have steering wheel controls (would like to use them) and the 10 speaker system. Please can someone tell me what I have done wrong?