V40 HU 655 radio removal information

[enrico_emme]

Hi to all,
first of all sorry for my English!
I have a V40 1.9 115 Sport since 2004 ... I spend a lot of time in my car ... more than 40.000 Km/year .... and till now I did not hane any problem ... simply perfec car.
In the last weeks I have the wish to increase the power of the audio system with a more performance one (only front speaker + subwoofer with 1 amplifier).
If someone can help me not to demage my car I kindly ask you the followig information:
1-How to remove the Radio HU 655 (I need to see the rear cable so to make the new cable connection)
2-How to remove the plastic under the door, close to the floor (front and rear), for the signal cable - Usually in the car the right side is better -
3- How to remove the original subwoofer

My intention is not to enter in the driver compartement with the main power cable (21 mmq), but fix it properly protected out under the body.
I would like to put the amplifier cloce to the spare wheel.

Thank you in advance for any help.

Enrico

PS:If there already are this in information in this forum ... sorry I did not find it