ML270 CDi 2000 reg .... few electrical problems

Hello there,

Hope anyone out there could provide some guidance here.

I have 2000 reg ML270 CDi deisel.

In a span of 2 months I had 2 problems :

(1) Left (passenger) side mirror electrical not working including the folding. Could this be just fuse issue? or does it need a total mirror unit replacement? estimated cost including labour?

(2) Left (passenger) side rear door central locking doesn't work i.e. if I press the central locking button on panel all doors lock / unlock except passenger side rear one. what could be the problem? what needs to be done? door replacement? cost?

And I had problem with switch for passenger side door window. The switch in the back is broken and pressing the small "stick like light thing" doesn't move the window. However, I can control window from central panel. what needs to be done here you think?

Any advice / suggestion highly appreciated.

Thanks,