This is my second UOA on the E55. Total miles is 119,220. A link to my first UOA is below. I changed the oil because it's been one year and I store it in the winter and like to have fresh oil in it while it sits. During the life of this current oil, I had to replace the oil cooler/oil filter housing which is the repair mentioned in the comments. I had to replace 0.5 quart of oil that leaked out during a repair. Iron is still a little higher than normal, but it's lower than the last sample (with less miles)
Some thoughts on the higher than normal iron: While this is an M113 engine, this is the AMG variant which has more displacement due to a longer stroke than it's 4.3 liter sibling. Could this longer stroke engine produce a little more iron than the 4.3? I'm sure BS doesn't have a vast amount of E55 engines in their database and they are comparing it to the 4.3 liter engine.
Another thought...I could be just flushing out the junk from the previous owner who may have had much longer OCI's? 2000 E55 UOA 11-2018