TD5 Disco hands-free install

[ChrisRS]

Hi Don't really spend much time in the LR forum but i'm in need of a bit of info,

I'm fitting a Nokia hands-free kit to a collegues 52 plate Disco next week and i need to know which wire controls the mute function for the radio/cd.

As far as i'm aware the cars fitted with the standard issue LR CD headunit.

Can anyone help?

Thanks. Chris