Also worth adding: I know the G52 transmission is not loved among rock crawler folks. That said I run stock sized tires and do mostly commuting and hauling/pulling/two-track wheeling/driving chained up through deep, packed snow, so maybe less stress than most of you guys?
That amount of metal on the magnetic plug may not be abnormal under certain driving conditions. Unless you have issues with noise or shifting, put in some Mobil 1 synthetic gear oil and drive it 20,000 miles.
Gnarls.
