140k miles of OM651 experience, total of zero emission related problems. My prior new unreliable new Mercedes diesel was a 2006 CDI. It’s still in my family and now has 302k miles on the clock. I’ve had it since 162k and the sum total of all engine issues have been 1 set of glow plugs and a thermostat. It’s been far, far more reliable than any OM61X engine I’ve ever owned.

I’m not saying all new MB diesels are perfect but dire predictions of apocalyptic meltdowns are not a universal reality.

I plan on keeping both of my bluetecs a long time, I’ll certainly update the board of any issues I have.