Volvo V70 III Year 2015 repair or sell ?

Hey dear people, I own a Volvo V70 III from 03/2015 (9101/APX). I used to buy the car 2 years ago with 85000km down. Now I had to find out after delivery of the car in a workshop that there should be a) leaks in the manifold or turbo (not quite clearly without the front axle and steering) b) The KAT / DPF has apparently dissolved (I and the car mechanic at 104.000km mileage is very funny) c) Big shell broken from the DPF d) Autob Atterie seems to be coming to an end and should be replaced (says mechanic). I was called a price of approx. 3500 – 4000 EUR (if bad luck also more). Now I ask myself whether it is worth the sum to invest in the car and to have everything done or if I should ask myself what else I could get for the car. I also wanted to ask what you think of the price.