Method for ascertaining a location area of a mobile terminal in relation to a vehicle, the method comprising: generating a set of positions in relation to one or more reference points of the vehicle; calculating a location probability of the mobile terminal for one position from the set of positions, wherein calculating a location probability of the mobile terminal for the position from the set of positions comprises: measuring a distance of the mobile terminal in relation to the one or more reference points of the vehicle; and ascertaining the location probability of the mobile terminal for the position by way of a nonlinear probability density function depending on the measured distance of the mobile terminal; assigning one position from the set of positions to one zone from a multiplicity of zones of the vehicle; determining an aggregated location probability of the mobile terminal for one zone from the multiplicity of zones depending on the positions assigned to the zone (126, 128, 130), wherein determining an aggregated location probability of the mobile terminal for one zone comprises: ascertaining a number of assigned positions of the zone; calculating a ratio from the number of assigned positions of the predefined zone and an overall number of positions from the set of positions; and determining the calculated ratio as the aggregated location probability of the mobile terminal for the predefined zone; and if the aggregated location probability of the mobile terminal for one zone (126, 128, 130) from the multiplicity of zones (126, 128, 130) exceeds a predefined confidence value: ascertaining the zone (126, 128, 130) as the location area of the mobile terminal. generating a set of positions in relation to one or more reference points of the vehicle; calculating a location probability of the mobile terminal for one position from the set of positions, wherein calculating a location probability of the mobile terminal for the position from the set of positions comprises: measuring a distance of the mobile terminal in relation to the one or more reference points of the vehicle; and ascertaining the location probability of the mobile terminal for the position by way of a nonlinear probability density function depending on the measured distance of the mobile terminal; measuring a distance of the mobile terminal in relation to the one or more reference points of the vehicle; and ascertaining the location probability of the mobile terminal for the position by way of a nonlinear probability density function depending on the measured distance of the mobile terminal; assigning one position from the set of positions to one zone from a multiplicity of zones of the vehicle; determining an aggregated location probability of the mobile terminal for one zone from the multiplicity of zones depending on the positions assigned to the zone (126, 128, 130), wherein determining an aggregated location probability of the mobile terminal for one zone comprises: ascertaining a number of assigned positions of the zone; calculating a ratio from the number of assigned positions of the predefined zone and an overall number of positions from the set of positions; and determining the calculated ratio as the aggregated location probability of the mobile terminal for the predefined zone; and ascertaining a number of assigned positions of the zone; calculating a ratio from the number of assigned positions of the predefined zone and an overall number of positions from the set of positions; and determining the calculated ratio as the aggregated location probability of the mobile terminal for the predefined zone; and if the aggregated location probability of the mobile terminal for one zone (126, 128, 130) from the multiplicity of zones (126, 128, 130) exceeds a predefined confidence value: ascertaining the zone (126, 128, 130) as the location area of the mobile terminal.