W222 S500 M 278 EN 46 AL Motor question

Hey all together I’m about to get a W222 s500… happen to have come across the YouTube video of ‘Motorenzimmer’ (https://m.youtube.com/watch?…) where it’s about the M 278 DE 46 AL engine which is also installed in the W222 pre-mopf… there he talks about the problems of the engine and also says that you should buy the engines only from the year 03/2015 because these are excluded from the problems. My question : are all the engines built during the period 2013-2015 b met? Even if you buy one with low mileage and good maintenance ? because there are some good listings which from a price point of view very agree me as well as equipment technical…