Electronic fault. Please help???

Hi all. Thank you for your time effort and advice. I’m desperately hoping that someone can help me. My car stopped running on 26th Feb. I went to start it for work and it just didn’t start. Lights came on and all was functioning but no start up. Since then I’ve had a mechanic who’s a close friend run diagnostics. He’s said he doesn’t know how to tackle it, he’s sent diagnostics to so many other garages and auto electricians and nobody wants to touch it. They’re just saying scrap it and move on but this was an expensive car for me and I really enjoy driving it too! I can plug the video of fault codes below, but I’m just so stuck with on what to do i feel like everyone has just given up on the hope of trying to get it fixed. I hope so much that someone can shed some light on this situation and point me in the right direction. It doesn’t help that the nearest DS garage is over 50miles away from me.

If I’m honest you need a dedicated DS service department to run a diagnosis test.
You’ll be surprised how one faulty electronic piece could throw up many fault codes.

This could be something major, or something that looks worse than it is.
I would rings a DS dealership for a diagnostic check price ?
Add in towing costs, then decide how much do you want to spend on the car.
If its only this that has been the problem might be worth having a figure in your head of what your willing to spend on the car.
My guess is around £100 - £150 for the diagnostic check , and maybe up to £100 for the tow ?
All of those components couldnt of gone faulty at the same time, so theres maybe one thing that controls them thats gone faulty.

Good day.
If everything works but the car does not start, sometimes it does and sometimes it does not. The wiring for the rear engine is under the rear seat. There are also plugs under the car, at the back, these can be damaged. New cable is very expensive and a lot of work because the electric motor at the back has to be dismantled. Also the coolant of this etc.
But I would first investigate whether all this wiring is still good.
Car does not start for safety reasons to prevent damage.
My car sometimes started and sometimes didn’t. It was difficult for the dealer to find, but after consulting a head electrician from Ds, the mechanic had to check this wiring. It turned out to be damaged in several places. Also, a number of plugs were no longer good. This could also have been caused by corrosion.
Hopefully this helps you.