the invention relates to a method for the operation of an exhaust gas aftertreatment system in an exhaust tract of an internal combustion engine . the exhaust gas aftertreatment system includes an scr particle filter , a first reducing agent feed device for introducing the reducing agent into the exhaust tract upstream of the scr particle filter , continuous regeneration of the scr particle filter being possible using nitrogen dioxide as oxidizing agent , an scr catalytic converter element arranged downstream of the scr particle filter , and a second reducing agent feed device for introducing the reducing agent into the exhaust tract downstream of the scr particle filter and upstream of the scr catalytic converter element . a control unit regulates a quantity of reducing agent introduced into the exhaust tract by the first reducing agent feed device and / or by the second reducing agent feed device as a function of the temperature of the scr particle filter .