🆘 2018 C350e Plug In Hybrid Starts then Turns Off | Codes Inside
Clear all the codes and see which comes back after the restart.
Take a look at all the fuses in the engine compartment box, and test continuity on the relays (especially the one labelled Circuit 30).
I have encountered past issues on mine and another friend's car where we had multiple codes relating to open or short circuits, and the fix for us was eventually replacing the relays.






