The mains plug is not plugged in.
Check whether the mains plug is plugged into the power supply unit and socket.

The barbecue cannot be switched on.
Check whether the mains plug is plugged into the power supply unit and socket.
Check whether the circuit breaker has tripped. Contact a qualified electrician or Miele Customer Service (for the minimum fuse rating, see data plate).
Disconnect the barbecue from the mains power supply for approx. 1 minute:
Switch off the relevant circuit breaker.
Switch off the residual current device.
If, after switching the circuit breaker or residual current device back on, the barbecue will still not switch on, contact a qualified electrician or Miele Customer Service.