W219 cls boot/trunk opener fuse?

[pensseli]

Hi,
boot opener in the door doesn´t work, works great from key or opening manually.
I opened the switch,found four wires (red,black,black/white,brown), but no voltage in any situation between these wires (shouldn´t there be something somewhere all the time?),and led doesn´t work on the switch.
Anyone knows where´s the fuse/relay for this? Or maybe there´s something wrong with the wire,where´s the other end,so I could test it?
Thank you!