Hi anybody and everybody.
I NEED HELP LIKE YESTERDAY.

Firstly, My name's Samantha and I'm in New Zealand.
In advance id like to say thanks for any advice , this is my first time asking anything /anywhere, so please excuse if I'm not correct in my formation
And I'm not too educated in the euro department, anyway....
I recently (3Months ago) purchased my
2005 AUDI A6
AVANT S LINE V8 4.2L / Station Wagon, from a social media marketplace advert, upon purchasing the previous owner *no longer contactable* advised me that the radio, navigation system, DVD etc, etc,, wasn't working and was unsure the cause of it, and he hadn't bothered to try get it going as he liked the quiet while driving.;
Apart from that he noted that when vehicle is parked up it will automatically lower itself, but that once started and let to warm up, that the car would self adjust the suspension and everything is back to 'normal.
//Remember I'm not educated with this particular vehicle, so I just took his word for it.
==== Since owning it and driving (the driving has been wonderful, no issues their, but I've learnt that the centre controls that he said didn't work..... Well, that is pretty much the brains of the car, this being the *
***"(MMI Control Unit )"***
And so that's as far as my knowledge goes for any relating specifications or functioning, I don't know what exactly it is ment to do, but when I start the car the screen turns on for about 4seconds but turns off and no response to any button pushing on the centre control unit, but it will turn on and display the reversing camera, while ofcourse having it in 'R'.

The passenger glove compartment is filled with DVD player, cd disc player and a another unit that I'm not too sure about.

I have located in the boot luggage passenger side, another 4/5 units that look maybe like the amp's etc....

I have quickly checked all 3 fuse box locations and those are even a mess, but all assigned fused that should be for the MMI CONTROL/ RADIO / NAVIGATION / TELEPHONE, ETC are what appears to be fine....