Mercedes-Benz C-Class Convertible 2021 Operator's Manual page 219

Message voice commands
Voice command
Text message to <Name>
Reply
Forward text message
Overview of vehicle voice commands
You can use the vehicle voice commands to
directly call up the corresponding menus for the
vehicle settings.
Vehicle voice commands
Voice command
Ambient light menu
Ambient light "blue"
Display and styles menu
Assistance menu
Function
To create a message. All address book names are available.
To reply to a message
To forward a message
Function
To display ambient light settings
To switch ambient light to blue
To show display settings
To display assistance settings
Voice Control System 217