G 400 CDI: Path of suffering or pure emotion ?

Hello together, after my two previous posts have been postponed in the forum (full understanding, because of sales offer), I launch another thread on the topic G 400 CDI – for the G-eschichtsbücher. Who has good experience with the 400 CDI? Who still drives a 400 CDI today and has no path of suffering behind him (i.e. https://www.hanshehl.de/verfahrt400cdi.htm)? Who would consider the purchase of a used G 400 CDI today? In my opinion, the 400 CDI is one of the most interesting Gs of all times. Not the best, but interesting, because of the OM 628. On the best list are probably G 500, G 320, G 300 TD, G 230GE. And on the diesel theme: there are some G-fans waiting for the W463b in the 350d version out there. Speaks probably for the MB diesel engines. Even in today’s times. becasse