You say you have no power at the fuse?
With the ignition on do you have 12V at both sides of fuse M24?
When testing the power to the fuse M24 make sure the ignition is on, the rear trunk and glass are closed and the rear wiper is turned on.
I have attached the fuse diagram in the picture below.
If you have no power here then you need to check the multi-function switch.
For this the best method is using a scan tool to check input changes from the multi-function switch.
Also check whether the signal from the trunk lid/glass shows that the trunk/glass is closed.
Let us know what you find with the fuse and the inputs from the multi-function switch and rear door switches.
Images (Click to enlarge)
Wednesday, February 26th, 2020 AT 11:06 AM