The 2011 Mercedes-Benz ML350 often suffers from serious engine issues, including
camshaft adjuster solenoid failure, timing chain tensioner problems, and severe oil leaks. The 3.5L V6 (M272) is prone to worn balance shaft gears.

Here are the documents that specify engine number ranges for M272 engines that had these issues.

What am I looking at here and how do I avoid the same issue? Is this the same engine n the ML320 CDI?