\documentclass[tikz]{standalone}
\usepackage{circuitikz}
\usepackage{siunitx}

\begin{document}
    \begin{tikzpicture}
        %car
        \draw[color=lightgray]
            % left wheel housing
            (1,1) -- ++(0,2)
            .. controls +(0,0.5) and +(0,0.5) .. ++(1.5,-0.75)
            -- ++(0,-0.25)
            % left light
            (1.25,1) -- ++(0,1.25)
            .. controls +(0,0.25) .. ++(0.5,0)
            .. controls +(0.5,-0.25) .. ++(0.5,-0.5)
            -- ++(0,-0.75)
            .. controls +(0,-0.25) .. ++(-0.25,-0.25)
            -- ++(-0.5,0)
            .. controls +(-0.25,0) .. ++(-0.25,0.25)
            ++(0.5,0.15) circle[radius=0.25]
            ++(-0.1,0.45) circle[radius=0.15]
            ++(-0.05,0.35) circle[radius=0.1]
            % floor
            (1,1) .. controls +(0,-0.5) .. ++(0.5,-0.5)
            -- ++(6.5,0)
            .. controls +(0.5,0) .. ++(0.5,0.5)
            % right wheel housing
            -- ++(0,2)
            .. controls +(0,0.5) and +(0,0.5) .. ++(-1.5,-0.75)
            -- ++(0,-0.25)
            % right light
            (8.25,1) -- ++(0,1.25)
            .. controls +(0,0.25) .. ++(-0.5,0)
            .. controls +(-0.5,-0.25) .. ++(-0.5,-0.5)
            -- ++(0,-0.75)
            .. controls +(0,-0.25) .. ++(0.25,-0.25)
            -- ++(0.5,0)
            .. controls +(0.25,0) .. ++(0.25,0.25)
            ++(-0.5,0.15) circle[radius=0.25]
            ++(0.1,0.45) circle[radius=0.15]
            ++(0.05,0.35) circle[radius=0.1]
            % ventilation
            (3.5,2) -- ++(0.25,-0.25)
            .. controls +(0.1,-0.1) .. ++(0.2,-0.1)
            -- ++(1.6,0)
            .. controls +(0.1,0) .. ++(0.2,0.1)
            -- ++(0.25,0.25)
            (2.7,0.5) -- ++(0.1,0.1)
            .. controls +(0.1,0.1) .. ++(0.2,0.1)
            -- ++(3.5,0)
            .. controls +(0.1,0) .. ++(0.2,-0.1)
            -- ++(0.1,-0.1)
            %cockpit
            (2.4,2.5) .. controls +(1,-0.2) and +(-1,-0.2) .. ++(4.7,0)
            (2.15,2.75) -- ++(0.3,0.5)
            .. controls +(0.6,1) and +(-0.6,1) .. ++(4.6,0)
            -- ++(0.3,-0.5)
            ++(-0.3,0.5) .. controls +(-0.3,0.6) and +(0.3,0.6) .. ++(-4.6,0)
            %spoiler
            (1.75,3) -- ++(0,0.75)
            -- ++(0.05,0)
            -- ++ (0,-0.78)
            ++(0,0.7) -- ++(1.165,0)
            ++(-1.165,-0.4) -- ++(0.66,0)
            (7.75,3) -- ++(0,0.75)
            -- ++(-0.05,0)
            -- ++ (0,-0.78)
            ++(0,0.7) -- ++(-1.165,0)
            ++(1.165,-0.4) -- ++(-0.66,0)
            %wheels
            (1.25,0.5) -- ++(0,-0.2)
            -- ++(1,0)
            -- ++(0,0.2)
            (8.25,0.5) -- ++(0,-0.2)
            -- ++(-1,0)
            -- ++(0,0.2);
        %controller
        \draw[color=lightgray]
            (-3.25,4.25) [rounded corners=7.5] -- ++(1.5,0.375)
            [rounded corners=1.5] .. controls +(-0.75,-0.75) .. ++(-0.375,-1.125)
            .. controls +(-0.3,-0.45) .. ++(0,-0.75)
            .. controls +(-0.3,-0.45) .. ++(0,-0.75)
            [rounded corners=7.5] .. controls +(-0.3,-0.45) .. ++(0.375,-1.5)
            -- ++(-1.5,0)
            .. controls +(-0.525,1.8) .. ++(-0.3,3.225)
            -- cycle
            [sharp corners] ++(0.5,0.125) -- ++(0,0.6)
            -- ++(-0.3,-0.075)
            -- ++(0,0.05)
            -- ++(0.7,0.175)
            -- ++(0,-0.05)
            -- ++(-0.3,-0.075)
            -- ++(0,-0.6);
        
        %circuit
        \draw (-4, -1) node[anchor=east] {$+$}
            to[open, v=${14.8V}$, voltage=straight, o-o] ++(0,-1)
            node[anchor=east] {$-$}
            (-3.5,-1) node[jump crossing](tmpX){}
            (-3,3.6) to[pR, name=poti, resistors/width=1.5, resistors/zigs=9, l=$\SI{30}{\ohm}$ ] ++(0,-2.1)
            -- ++(0,-2.5)
            -- (tmpX.east)
            (-4,-1) -- (tmpX.west)
            (-4,-2) to[short, -*] ++(0.5,0)
            -- (tmpX.south)
            (tmpX.north) -- (-3.5,3.8)
            to[short, -*] ++(0.5,0)
            (poti.wiper) -- (poti.wiper |- 42,-1)
            -- (3.5,-1)
            -- ++(0,1.75)
            to[R=$\SI{6,8}{\ohm}$] ++(0,1.5)
            to[C=$22nF$, name=cap] ++(2.5,0)
            to[R=$\SI{6,8}{\ohm}$] ++(0,-1.5)
            -- ++(0,-2.75)
            -- ++(-9.5,0)
            (cap.center) ++(-0.75,0) to[short, *-] ++(0,-1)
            to[Telmech=M] ++(1.5,0)
            to[short, -*] ++(0,1);
    \end{tikzpicture}
\end{document}