E65 2002 Amp telephone mute help

Hello guys,

I got myself a 2002 745i late last year. I have been browsing the forums to acquire knowledge about various things on the car. All in all an excellent vehicle I must say.

I was wondering if anyone of you could guide me in the right direction plz. I wanted to have installed a new model parrot kit which has usb,sd,ipod etc support. I am stuck at one the point which is to figure out a way to mute the amp. Its the non logic7 amp.

Would you guys know if this amp has Tel mute possibility?
Any one of you has the wiring diagram plz?
Any other suggestion/advice plz?

Some manufacturers produce leads for this purpose but none are for the pre facelift e65 that I could find.

Thanks in advance.