I have a restyling w212 e300 bluetehybrid,
 

Today i was riding on the diesel engine (the outside temperature was 19°C and the hybrid engine usually wasn't starting at this temperature) at an intersection the hybrid engine has started,but when i pressed the gas pedal on the board computer apeared "Error" notification and the diesel engine won't start until i stopped the car and tirned the ignition off,but then the radiator vent has started to work louder,but the engine was at normal operating temperature.
Now i'm home and i think what to do.Can somebody help me?