I have a 2011 ML350 Blutec Diesel and I have cleaned the DPF and then found the turbo was seized, so I just replaced it.
Now with everything back together it starts for a short time and then quits. It was also doing this when the DPF was clogged.
Please see the attached video, maybe some of the sounds are familiar.
Also no codes have changed since before the turbo replacement.

Please help......

 

Great

 

If your vehicle is not staying running, there could be several potential causes. First, check if the fuel system is functioning properly, ensuring the fuel pump is delivering adequate pressure and the fuel filter is not clogged. A dirty or malfunctioning air filter can restrict airflow, causing stalling or difficulty in staying running. Additionally, issues with the ignition system, such as faulty spark plugs, ignition coils, or wiring, could prevent the engine from firing correctly. A failing alternator or battery can also result in poor power supply, causing the engine to stall. Lastly, sensors like the mass airflow sensor (MAF) or the throttle position sensor (TPS) might be malfunctioning, leading to incorrect air-fuel mixtures taco bell logo. It's best to diagnose the issue through proper inspection or by using a diagnostic tool to identify any error codes.