Mercedes-benz Group Ag

Yousif Hanna

Matthias Reinhardt

Verena Lutterbeck

Christian Rupert

Martin Lallinger

Karl-Juergen Peters

A method for operating functional unit of a motor vehicle using an identification system, in which at least a first authorization is requested for operating the functional unit and an identification signal is transmitted to an identification device by an identification element of the identification system. The functional unit is operated after receiving and the functional unit is only operated in a second authorization. The second authorization is generated by the identification device. Using the identification device, a first signal duration of the identification signal is determined for determining a first spacing of the identification element at a first point in time, and a second signal duration of the identification signal is determined for determining a second spacing of the identification element at a second point in time, and the second authorization is generated depending on a comparison.

Method for operating a functional unit of a motor vehicle by means of an identification system, in which two authorizations are necessary, and an identification system

A plurality of keys are registered to the vehicle for opening the vehicle. A respective key must answer within a predetermined timeslot after a first request transmitted by the vehicle, in order to open the vehicle. Several such successive timeslots are provided and several keys are allocated to at least one of these timeslots.

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Ostelsheim, Germany

Yousif Hanna