Petronis

Hey all, so i have an issue with my ml280.
When i check with diagnosis i get most of the issues from the front SAM that i tried to clean ( as i did with the rear one,which got fixed by that) but it didnt fix any issues...
- I dont have AC in thr front of the car (ventilation in the back seat is blowing)
- Wipers dont work
- Both xenons also dont work ( position and indicators work )

Does anyone cane any advice maybe if i should check some wiring or connections idk but i would appreciate any help regarding this...
i am thinking about buying a new Front SAM but idk if it will fix all the issues or its something else too...

Thanks for any help