Certified Pre-Owned about 100k, I bought at 140k in 2015 from a meticulous owner. Only big issue to date: 722.6 went to limp mode, using the MB Diagnostic Matrix, fault was found in 13 wire harness (Ground and PWM wires) (in the cockpit, not underneath). Replaced with Pick-a-Part harness and 18ga speaker wire. Also, removed, disassembled and cleaned valve body, complete tear-down including valves and springs. Did fluid flush using old filter's connector - cut it off filter, added hose to put into new fluid for pickup. Easy to do. It shifts like new.
2001 ML320 Designo (Bourbon/Anthracite)