In a method and apparatus for wireless transmission of messages between a vehicle-internal communication system and a vehicle-external central computer, the vehicle-internal communication system has acoustic output unit for the playback of a received message. In the vehicle-external central computer, the message, which is at first present in text form and is to be sent to the vehicle-internal communication system, is transformed into a phonetic transcription; the phonetic transcription, is then transmitted to the vehicle-internal communication system. In the vehicle internal communication system, the phonetic transcription is transformed to speech and is emitted via the acoustic output unit. Spoken messages from a vehicle occupant are recorded via an acoustic input unit, processed and transmitted to the central computer by reversal of the same process.