Ruska

I drive MB PHEV GLC350e. While driving in the EV mode every time after hard acceleration, when the vehicle switches to ICE, the 'check engine' light comes on (no blinking, just a steady light). We ran diagnostics two times - once they changed the thermostat, second time added coolant. Before I go there for the third time, just wanted to ask if anyyone expericed something similar and how was it resolved? Or any suggestions anyone might have?

no_mulligan

Get a scan tool that will read the codes thru the OBD-II port under the steering column.

mikapen

Check for coolant leaks around the expansion tank cap.