Mercedes-Benz E-Class Sedan Operator's Manual page 220

218 Voice Control System
Command
Telephone commands
Command
Function
To switch the route guidance voice output on/off
To switch the traffic map on/off
To switch the POI symbols display on the map on/off
You can use the telephone commands to make
phone calls or search through the address book.
Function
To make a phone call. All address book names are available.
To search for and display a contact. All address book names are available.
To display the last call.
To select the last phone number dialed.