A method for updating a set of filling parameters for a wet clutch system, the method comprising the steps of: providing the wet clutch system, the wet clutch system comprising: a piston being movably disposed in a housing, the piston being movable into an extended position by a preloaded spring and into a retracted position by applying an engagement pressure on the piston by a hydraulic fluid, wherein in the retracted position torque is transmittable through a clutch, a proportional valve disposed for regulating a pressure of the hydraulic fluid in the housing, a controller controlling the proportional valve, a sensor for measuring a response of the wet clutch system; providing the set of filling parameters for the wet clutch system, the set of filling parameters including a fill time indicating a length in time required to fill the housing with the hydraulic fluid and to position the piston against a set of friction plates (52, 54) of the wet clutch system, and the set of filling parameters including a kiss pressure indicating a hydraulic force necessary to counteract a spring force once the piston is placed against the set of friction plates (52, 54); actuating the wet clutch system by filling the housing of the wet clutch system with a hydraulic fluid based on the set of filling parameters including the fill time and the kiss pressure; sensing a response of the wet clutch system during actuation of the wet clutch system; comparing observed filling parameters to the set of filling parameters including the fill time and the kiss pressure; calculating a fill error between the observed filling parameters and the set of filling parameters including the fill time and the kiss pressure; and adjusting a plurality of the set of filling parameters including the fill time and the kiss pressure based on the fill error. providing the wet clutch system, the wet clutch system comprising: a piston being movably disposed in a housing, the piston being movable into an extended position by a preloaded spring and into a retracted position by applying an engagement pressure on the piston by a hydraulic fluid, wherein in the retracted position torque is transmittable through a clutch, a proportional valve disposed for regulating a pressure of the hydraulic fluid in the housing, a controller controlling the proportional valve, a sensor for measuring a response of the wet clutch system; a piston being movably disposed in a housing, the piston being movable into an extended position by a preloaded spring and into a retracted position by applying an engagement pressure on the piston by a hydraulic fluid, wherein in the retracted position torque is transmittable through a clutch, a proportional valve disposed for regulating a pressure of the hydraulic fluid in the housing, a controller controlling the proportional valve, a sensor for measuring a response of the wet clutch system; providing the set of filling parameters for the wet clutch system, the set of filling parameters including a fill time indicating a length in time required to fill the housing with the hydraulic fluid and to position the piston against a set of friction plates (52, 54) of the wet clutch system, and the set of filling parameters including a kiss pressure indicating a hydraulic force necessary to counteract a spring force once the piston is placed against the set of friction plates (52, 54); actuating the wet clutch system by filling the housing of the wet clutch system with a hydraulic fluid based on the set of filling parameters including the fill time and the kiss pressure; sensing a response of the wet clutch system during actuation of the wet clutch system; comparing observed filling parameters to the set of filling parameters including the fill time and the kiss pressure; calculating a fill error between the observed filling parameters and the set of filling parameters including the fill time and the kiss pressure; and adjusting a plurality of the set of filling parameters including the fill time and the kiss pressure based on the fill error.