Picked up a set of pads wile ML was in the shop. Checked with service advisor to find out when I last had pads changed and it turned out to be around 15K miles ago, not 5K as I originally thought. So maybe the wear is actually normal for my now frequent stop-and-go commuting I get to enjoy daily.
Well, new pads are going in this weekend...
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car