Marx’s Dialectical Method is to write dialectal critiques .

MARX EXTRACTS RATIINAL KERNEL'S , PRESERVES RATIONAL KERNELS AND OVERCOMES USELESS HUSKS

https://www.marxists.org/archive/marx/works/1886/ludwig-feuerbach/index.htm

Engels's _Ludwig Feuerbach and the End of Classical German Philosophy_ is a Critique of Classical Philosophy, like Capital is Critique of Political Economy or all the other works by Marx and Engels which are Critiques. Marx's Dialectical method is to write dialectical critiques. Critiques of Political Economy prior to Capital; and of political economy _and _ philosophy in The Philosophical and Economic Manuscripts of 1844; there's a detailed one of Hegel there. There's the Critique of Hegel's Philosophy of Right ( Law) with the famous critique of religion in the introduction.

The German Ideology is a critique of the Young Hegelians and Feuerbach. Marx and Engels ( and Feuerbach) found the truly Critical Philosophy or rather overcome and preserve Classical German Idealist Philosophy

https://www.marxists.org/archive/marx/works/1886/ludwig-feuerbach/index.htm