Azimuthal-correlation functions of $\Dzero$ mesons with associated particles, after the subtraction of the baseline, in pp collisions at $\sqrt{s}$ = 13 TeV, for 3 $< \ptD <$ 5 \GeVc, 5 $< \ptD <$ 8 \GeVc, 8 $< \ptD <$ 16 \GeVc, and 16 $<\ptD<$ 24 \GeVc (from left to right) and $\ptass>$ 0.3 \GeVc, 0.3 $<\ptass<$ 1 \GeVc, 1 $<\ptass<$ 2 \GeVc, 2 $<\ptass<$ 3 \GeVc (from top to bottom) for different multiplicity classes estimated with V0M. The four multiplicity classes are shown with different marker styles. Statistical and $\Delta\varphi$-dependent systematic uncertainties are shown as vertical error bars and boxes, respectively, and $\Delta\varphi$-independent uncertainties are written as text. The uncertainties from the subtraction of the baseline are displayed as boxes at $\Delta\varphi>\pi$.