Audi A4 Avant 3.0 TDI ambition with 200,000km (too much?)

Hey, since this is my first post, I hope to publish it in the right place in the forum. Currently I drive a BMW 320i Touring 320i built in 2007 (purchased at 183000km, currently 205000km). I bought the car 11 months ago and since then I only had problems and was in the workshop several times each month. Since my nerves have broken and my dealer could make me a very fair offer for the current car, I am looking for a new one. Now I have come across an Audi A4 B8 (2013) Facelift 3.0 TDI with 204ps and automatic. Everything fits from the equipment, but what does the equipment and the look bring if the engine is not running and you have other repairs. The car had 2 previous owners and currently has 199,920km on the clock. Now my question: Is it worth it to buy such an Audi with this mileage and what should I absolutely pay attention and have this checked out beforehand if necessary? (typical Pr obleme, other abnormalities) For every help and every tip I am really very grateful, because I want to lay down a car, with which I finally have peace and am not regular customer in the workshop with