Can anyone help
2016 c350e won’t change from cable but charges fine from engine

plug it in - locks to cable but then flashed red and doesn’t charge

tried 2 different chargers (that work on another car)
help anyone know why it might be ?

thank you

 

What is flashing red? on the charger? at the plug in the bumper? in the dash?

 

On the bumper next to the connector - starts with white padlock unlocked - connect plug and it locks to it then it flashes a red battery symbol and nothing happens