Can anyone advise on the installation of an amp? I want to install an amplifier into the audio system on my 98 UK spec 523. It is fitted with a BMW Business package, which has the familiar head unit with cassette player and boot-mounted CD changer. It doesn't have an amplifier located in the boot, and it doesn't look like that the car is pre-wired for an amp to be retro-fitted. Is there any way that I can fit an amp without butchering the wiring loom? What is the best route to go - a multi channel amp or seperate amp for the front and rear? Any help or assistance or advice would be welcome, as I'm beginning to think that this might be too much effort to take on at the current time.

Thanks for any help with this!