Definitely get the fuel filter/pressure regulator upgrade done. The design changed quite a bit (incl. hoses), and may prevent a fuel pump failure down the road (don't ask how I know).

You may need a new Air Mass Sensor ($$$), but not until it goes out. You will know when the time comes, because performance suffers dramatically...feels like you are towing the Queen Mary!

There is an upgraded harness for the A/C aux fans that is heavier than the old one. The anemic original harness wasn't up to the task, and would blow fuses.

Other than that, there are some factory issues that may need to be addressed...I'm surprised that the ML hasn't had anything done other than routine service, as a lot of the issues cropped up during the warranty period.

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car