A communication system is provided for a vehicle having multiple antennas and multiple transmitting and/or receiving interfaces. At least one first antenna is arranged in the interior of the vehicle, and at least one second antenna is arranged on the outside of the vehicle. The first antenna is designed to wirelessly establish at least one part of a data connection between a first communication unit which is located in the interior of the vehicle and at least one first network base unit which is located outside of the vehicle via a first transmitting and/or receiving interface. The second antenna is designed to wirelessly establish at least one part of a data connection between a second communication unit which is located in the interior of the vehicle and the first and/or a second network base unit which is located outside of the vehicle via a second transmitting and/or receiving interface. The communication system is designed such that a data connection can be established within the vehicle between the second communication unit and the first antenna via the second transmitting and/or receiving interface.