After the ignition is switched off

The roof can still be operated for approx. 1 minute, as long as no door has been opened.

    See also:

    Coolant temperature
    Should the coolant, and with it the engine, become too hot, a Check Control message is displayed. Check the coolant level. ...

    Coupe: glass roof, electric
    To prevent injuries, watch the glass roof while closing it. Take the remote control with you when you leave the car; otherwise, children could operate the roof and possibly injure themselves. ...

    Use coasting conditions
    When approaching a red light, take your foot off the accelerator and let the vehicle coast to a halt. On a downhill gradient, take your foot off the accelerator and let the vehicle roll. The flo ...