Method for acquiring a value of a defined first reference point (SWA_CENTER) of a first variable which is measured by means of an incrementally measuring sensor of a motor vehicle, wherein - intermediate values (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) of the defined reference point (SWA_CENTER) are acquired in at least two detection modules (16, 17, 18, 19) using at least one second measured variable, wherein each detection module (16, 17, 18, 19) is adapted to the determination of the value of the defined reference point (SWA_CENTER) of the first variable in a predefined driving situation, - a quality level (QR_LEVEL1, QR_LEVEL2, QR_LEVEL3) is determined for each intermediate value (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) which is acquired, - the quality levels (QR_LEVEL1, QR_LEVEL2, QR_LEVEL3) of the intermediate values (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) which are acquired in various detection modules (16, 17, 18, 19) are compared, - the value of the defined reference point (SWA_CENTER) is determined from the acquired intermediate values (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) in accordance with the result of the comparison of the quality levels (QR_LEVEL1, QR_LEVEL2, QR_LEVEL3), - each detection module (16, 17, 18, 19) is assigned a ranking corresponding to an expected level of precision of the intermediate value (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) which is acquired in the detection module (16, 17, 18, 19), and - the intermediate value (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) which has been acquired with a relatively high ranking in the detection module (16, 17, 18, 19) is used as the value for the defined reference point (SWA_CENTER) if intermediate values (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) which are acquired in a plurality of detection modules (16, 17, 18, 19) have corresponding quality levels (QR_LEVEL1, QR_LEVEL2, QR_LEVEL3). - intermediate values (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) of the defined reference point (SWA_CENTER) are acquired in at least two detection modules (16, 17, 18, 19) using at least one second measured variable, wherein each detection module (16, 17, 18, 19) is adapted to the determination of the value of the defined reference point (SWA_CENTER) of the first variable in a predefined driving situation, - a quality level (QR_LEVEL1, QR_LEVEL2, QR_LEVEL3) is determined for each intermediate value (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) which is acquired, - the quality levels (QR_LEVEL1, QR_LEVEL2, QR_LEVEL3) of the intermediate values (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) which are acquired in various detection modules (16, 17, 18, 19) are compared, - the value of the defined reference point (SWA_CENTER) is determined from the acquired intermediate values (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) in accordance with the result of the comparison of the quality levels (QR_LEVEL1, QR_LEVEL2, QR_LEVEL3), - each detection module (16, 17, 18, 19) is assigned a ranking corresponding to an expected level of precision of the intermediate value (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) which is acquired in the detection module (16, 17, 18, 19), and - the intermediate value (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) which has been acquired with a relatively high ranking in the detection module (16, 17, 18, 19) is used as the value for the defined reference point (SWA_CENTER) if intermediate values (SWA_CENTER_LEVEL1, SWA_CENTER_LEVEL2, SWA_CENTER_LEVEL3) which are acquired in a plurality of detection modules (16, 17, 18, 19) have corresponding quality levels (QR_LEVEL1, QR_LEVEL2, QR_LEVEL3).