1.6 Ecotech business edition

[ijmj]

I have a 2013 Mondeo 1.6 Tdci Ecotech Business edition, with touch screen satnav/radio/cd, just wondering if anyone knows if I can add a 6 disc CD auto changer to the head unit as it's only a single CD, I think. If I can what would I need. by the way I know it MP3 compatible etc but I'm a little old school. any help would be appreciated,  Just one other thing, the voice control doesn't seem to work, loads etc then just keeps requesting select language, which I do (english uk ) loads then goes back to select language  any ideas ? many thanks.