In mine (156) it was held in place in a vertical position on the far left of the boot. 2 brackets anchored by 4 self tappers, if I remember correctly. I guess if they're dealer fit, other mounting methods may be used?I've been meaning to take the multichanger out of my 147 for ages. The magazine is stuck in it so I think it needs at least partially disassembling. Do you have to take the carpet out of the boot to get it out?