All windows and interior light not working - father with dementia tinkered with car..

[Krmass25]

Hi folks,
So unfortunately my wonderful father passed away at 87 years old unexpectedly.
We found he had been hiding some sort of cognitive thing and he had a number of things taken apart and not put back together.

I had the A4 stored in his garage with only an A/C condenser needed.

I visit and come to find out he removed the cowl below the windshield and left it off. He also took the screws out for the ecm cover below the windshield on the drivers side.
He also has my entire luft teknik intake out and thrown in a pile..
He decided to remove my brand new tires, put them on a lincoln and trade it in leaving me with a completely worn out set of tires for no reason at all. Just dementia obviously.. Gave away a new set of tires [headbang]

No windows roll down
No lights come on in cabin when door is opened.

Any central components to focus on checking to save time for myself? This sucks!

[a4audi4fun]

Basic things but have to ask:
Is the console overhead switch in the appropriate position?
Have fuses been checked?
Do any other electrical parts work?
Does the engine crank?

Module 9, Central Electronics and Module 46 Central Convenience are key modules to scan for possible errors.

[Krmass25]

Basic things but have to ask:
Is the console overhead switch in the appropriate position?
Have fuses been checked?
Do any other electrical parts work?
Does the engine crank?

Module 9, Central Electronics and Module 46 Central Convenience are key modules to scan for possible errors.

Thanks for that. Switches are in the right positions. He left the car outside and water may have got into some components, that is my fear.
When I can get by there, these things you suggested will be the first list of things I diagnose.