Operating method for a drive arrangement for a vehicle, an electric bicycle, ebike or pedelec which can be driven by muscle power and/or (in particular, additionally) by motor power, - wherein the drive arrangement is configured with: - a crankshaft which can be rotated about a rotational axis for receiving a first torque which is generated, in particular, by muscle power, and - a transmission device which is configured to transmit the first torque from the crankshaft to an output element which can be coupled to a drive wheel of the vehicle and by means of an (in particular, automatically) shiftable multiple-stage planetary transmission for a variable transmission ratio, - wherein, in the case of the operating method: - a respective transmission ratio of the planetary transmission is set via a gear selection or a gear change and by way of controlled fixing and/or releasing of respective sun gears (55, 56) and/or the sun gears (55, 56) of corresponding planetary stages (57, 58), and, - for each transmission ratio and for each gear of the drive arrangement, at least one of the sun gears (55, 56) is always fixed and/or at least one of the planetary stages (57, 58) which correspond to the sun gears (55, 56) is always fixed, - controlled fixing and releasing of a respective sun gear (55, 56) and/or a planetary stage (57, 58) which corresponds to the respective sun gear (55, 56) takes place via fixing and releasing, respectively, of a driver element which is coupled fixedly to a respective sun gear (55, 56) for conjoint rotation, characterized in that precisely one predetermined sun gear (55, 56) and/or the planetary stage (57, 58) which corresponds to this sun gear (55, 56) are/is fixed permanently. - wherein the drive arrangement is configured with: - a crankshaft which can be rotated about a rotational axis for receiving a first torque which is generated, in particular, by muscle power, and - a transmission device which is configured to transmit the first torque from the crankshaft to an output element which can be coupled to a drive wheel of the vehicle and by means of an (in particular, automatically) shiftable multiple-stage planetary transmission for a variable transmission ratio, - wherein, in the case of the operating method: - a respective transmission ratio of the planetary transmission is set via a gear selection or a gear change and by way of controlled fixing and/or releasing of respective sun gears (55, 56) and/or the sun gears (55, 56) of corresponding planetary stages (57, 58), and, - for each transmission ratio and for each gear of the drive arrangement, at least one of the sun gears (55, 56) is always fixed and/or at least one of the planetary stages (57, 58) which correspond to the sun gears (55, 56) is always fixed, - controlled fixing and releasing of a respective sun gear (55, 56) and/or a planetary stage (57, 58) which corresponds to the respective sun gear (55, 56) takes place via fixing and releasing, respectively, of a driver element which is coupled fixedly to a respective sun gear (55, 56) for conjoint rotation, characterized in that precisely one predetermined sun gear (55, 56) and/or the planetary stage (57, 58) which corresponds to this sun gear (55, 56) are/is fixed permanently. - a crankshaft which can be rotated about a rotational axis for receiving a first torque which is generated, in particular, by muscle power, and - a transmission device which is configured to transmit the first torque from the crankshaft to an output element which can be coupled to a drive wheel of the vehicle and by means of an (in particular, automatically) shiftable multiple-stage planetary transmission for a variable transmission ratio, - wherein, in the case of the operating method: - a respective transmission ratio of the planetary transmission is set via a gear selection or a gear change and by way of controlled fixing and/or releasing of respective sun gears (55, 56) and/or the sun gears (55, 56) of corresponding planetary stages (57, 58), and, - for each transmission ratio and for each gear of the drive arrangement, at least one of the sun gears (55, 56) is always fixed and/or at least one of the planetary stages (57, 58) which correspond to the sun gears (55, 56) is always fixed, - controlled fixing and releasing of a respective sun gear (55, 56) and/or a planetary stage (57, 58) which corresponds to the respective sun gear (55, 56) takes place via fixing and releasing, respectively, of a driver element which is coupled fixedly to a respective sun gear (55, 56) for conjoint rotation, characterized in that precisely one predetermined sun gear (55, 56) and/or the planetary stage (57, 58) which corresponds to this sun gear (55, 56) are/is fixed permanently. - a respective transmission ratio of the planetary transmission is set via a gear selection or a gear change and by way of controlled fixing and/or releasing of respective sun gears (55, 56) and/or the sun gears (55, 56) of corresponding planetary stages (57, 58), and, - for each transmission ratio and for each gear of the drive arrangement, at least one of the sun gears (55, 56) is always fixed and/or at least one of the planetary stages (57, 58) which correspond to the sun gears (55, 56) is always fixed, - controlled fixing and releasing of a respective sun gear (55, 56) and/or a planetary stage (57, 58) which corresponds to the respective sun gear (55, 56) takes place via fixing and releasing, respectively, of a driver element which is coupled fixedly to a respective sun gear (55, 56) for conjoint rotation,