Method for treatment of an exhaust stream in an exhaust treatment system of a vehicle, which results from a combustion in a combustion engine of the vehicle, comprising: - determining a soot threshold value S th based on at least one or more operating conditions for said combustion engine, which operating conditions affect a level of flow for said exhaust stream , wherein said one or more operating conditions comprise one or more measured, modelled and/or predicted operating conditions; - a first oxidation of compounds comprising one or more of nitrogen, carbon and hydrogen in said exhaust stream with the use of a first oxidation catalyst ; - a control of a first supply of a first additive into said exhaust stream with the use of a first dosage device , arranged downstream of said first oxidation catalyst , wherein said control of said first supply is carried, out with the objective of preventing an accumulation of soot exceeding said soot threshold value S th in a catalytic filter , arranged downstream of said first dosage device ; - a first reduction of nitrogen oxides NO x in said exhaust stream with the use of reduction characteristics in an at least partly catalytic coating comprised in said catalytic filter , and with the use of said first additive; - a catching and oxidising of soot particles in said exhaust stream with the use of said catalytic filter ; and - a control of a second supply of a second additive into said exhaust stream with the use of a second dosage device , arranged downstream of said catalytic filter ; - a second reduction of nitrogen oxides NO x in said exhaust stream , with the use of at least one of said first and said second additive in a reduction catalyst device , arranged downstream of said second dosage device ; wherein said control of said first supply of said first additive based on said soot threshold value S th results in nitrogen dioxide NO 2 , for facilitating oxidation of soot particles in said catalytic filter , being available in said catalytic filter. - determining a soot threshold value S th based on at least one or more operating conditions for said combustion engine, which operating conditions affect a level of flow for said exhaust stream , wherein said one or more operating conditions comprise one or more measured, modelled and/or predicted operating conditions; - a first oxidation of compounds comprising one or more of nitrogen, carbon and hydrogen in said exhaust stream with the use of a first oxidation catalyst ; - a control of a first supply of a first additive into said exhaust stream with the use of a first dosage device , arranged downstream of said first oxidation catalyst , wherein said control of said first supply is carried, out with the objective of preventing an accumulation of soot exceeding said soot threshold value S th in a catalytic filter , arranged downstream of said first dosage device ; - a first reduction of nitrogen oxides NO x in said exhaust stream with the use of reduction characteristics in an at least partly catalytic coating comprised in said catalytic filter , and with the use of said first additive; - a catching and oxidising of soot particles in said exhaust stream with the use of said catalytic filter ; and - a control of a second supply of a second additive into said exhaust stream with the use of a second dosage device , arranged downstream of said catalytic filter ; - a second reduction of nitrogen oxides NO x in said exhaust stream , with the use of at least one of said first and said second additive in a reduction catalyst device , arranged downstream of said second dosage device ; <EOS>