I think we have got spoiled by the 123's.The 124 is not designed to give 300,000 or 500,000. I am afraid the MB has learned the rule of the 57' Chevy. If we build them this good and easy to work on no one will need another one, unless they wreck it or it rust to hell.
I would love to see a Lexus or Infity give 500,000 miles. And the parts are also high as heck.
No one can argue that MB have lowered their QC. In order to make more profit. And it is bitting them in the back side.
Just my .02
Charlie