Method for coating a wall-flow filter

A method for producing a wall-flow filter, having inlet and outlet channels, for reducing the harmful substances in the exhaust gas of an internal combustion engine, wherein a dry wall-flow filter is selectively impinged on its inlet surface with a dry powder/gas aerosol which has at least one high-melting compound, such that the powder precipitates in porous filter walls positioned between the inlet and outlet channels of the wall-flow filter, wherein

• the powder is dispersed in a dispersion gas, then guided into a gas stream, and drawn into an inlet side of the wall-flow filter without further supply of a gas, wherein 5% to 35% of the total pore volume of the porous filter walls, between the inlet and outlet channels, is filled with deposited powder and wherein the powder is supplied in a sufficient amount as to at least fill in the pores of the inlet surface of the filter walls up to an input surface level of the pores.