e39 amplifier problem

Hi!

I was looking a better amp for my car but i don't know what amplifier it has now. Can't find anything similar on google or any wiring diagram. I hope that I could find all wires for front speakers and install 4 ch amp, running front and subwoofer.

i got a 6 channel amp for sell or trade hit me up if u looking to run all ur speakers clean and good look for a 5 to 6 channel amp. so u can run ur sub too