I almost agree that the oil pumps are bullet proof....on my 1990 300CE I noticed that while driving I suddenly lost oil pressure. As luck would have it, the pump seized up internally and the bolt that attaches chain pulley snapped right off. The local shop I go to has never seen that happen before. Thank goodness for the oil pressure guage....now for my 99 ML320 I assume Mercedes feels that oil pressure will never be an issue since there isn't any sensor for oil pressure. They have a oil level sensor, but no oil pressure sensor. Go figure....
Have a safe and happy new year!
2003 SLK230 (Sport - 6spd)
1995 Ford Thunderbird