If the trans was mostly highway miles, zero wear occurs on the clutches. And with adaptive electronic control, wear is minimized. This trans applies and releases clutches based on RPM feedback not a blind hydraulic valve body.

I rebuilt the trans in my 97 C280 at 161,000 miles due to a worn input shaft bushing. It wore just enough for the planetary to sing only after driving on a rough road ( this got things spinning off center ) The frictions looked as new, near as I could tell the trans was never rebuilt and filter was only a few years newer then the car. ( look at date codes on plastic parts )

A factory MB rebuild will have the part / serial number ground off the rectangular pad on the left side of the trans and a plate stuck on.