benv6 said:
Power Supply ...sorry :headbang:
Dont know about e89 but in the e85 i have my amp is located behind the battery in the boot with the audio cabling routed back to head unit and speakers through a central conduit in cabin/boot wall.
Maybe take up carpet in boot to find power loom if it exists?
Photo 23-08-2016 12 33 39.jpg