Most "hi-tech" car of any age, for 7k.

[samsock]

Any age, what car would give me the most gadgets, driving assist, biggest touch screen etc?

For 7k

[S54Love]

For what is, putting it nicely, a very vague question, you can get two spectrum.

A barge from 10 years ago, such as a LS or S-Class
https://www.autotrader.co.uk/classified/advert/201...
https://www.autotrader.co.uk/classified/advert/201...

Or you could get a Peugeot 208
https://www.autotrader.co.uk/classified/advert/201...

Totally different league, but it has CarPlay apparently, which obviously the barges from 10 years ago didn't, so you might want to define what type of car you actually want.

[dudleybloke]

Audi a8