\documentclass[12pt,a4paper,oneside,ngerman]{article}
\usepackage[left=3cm,right=3cm,top=2.5cm]{geometry}

\usepackage[utf8]{inputenc}
\usepackage{hyperref}
\usepackage{ngerman}
\usepackage{enumerate}
\usepackage{amsmath,amssymb}
\usepackage{listings}
\usepackage{xcolor}
\usepackage{colortbl}
\usepackage{wrapfig}
\usepackage{multicol}
\usepackage{caption}
\usepackage{graphicx}
\usepackage{amsmath}
\usepackage{float}
\usepackage{tikz}
\usepackage{fancyhdr}

\usetikzlibrary{arrows,automata,backgrounds,calc,decorations,decorations.text,intersections,matrix,mindmap,patterns,shadings,shapes,shapes.gates.logic.US}

\pagestyle{fancy}
\setlength{\headheight}{20pt}
\setlength{\parindent}{0em}
\setlength{\parskip}{0.25em}

%Variables
\def \module                {}
\def \moduleShort	    {}
\def \documentTitle         {}

\def \tutor 		    {}
\def \tutorium              {}
\def \DayTime		    {}

\def \group                 {}

\def \memberOne             {}
\def \memberOneMatricle     {}

\def \memberTwo             {}
\def \memberTwoMatricle     {}

\def \memberThree           {}
\def \memberThreeMatricle   {}

\fancyhead[R]{\moduleShort, \documentTitle, \tutor}
\fancyhead[L]{\memberOne, \memberTwo, \memberThree}

\newcommand{\linia}{\rule{\linewidth}{0.5pt}}
\renewcommand{\maketitle}{
	\begin{multicols}{2}
		\hspace{-1cm}
		\begin{tabular}{ll}
			Gruppe:  & \group                              \\
			Autoren: & \memberOneMatricle \ \memberOne     \\
			         & \memberTwoMatricle \ \memberTwo     \\
			         & \memberThreeMatricle \ \memberThree
		\end{tabular}
		\columnbreak

		\hspace{-1cm}
		\raggedleft
		\begin{tabular}{ll}
			Tutorium: & \ \tutorium \\
			Tutor:    & \ \tutor    \\
			Zeit:     & \ \DayTime  \\
		\end{tabular}
	\end{multicols}

	\begin{center}
		\Large{\module}
		\LARGE{\documentTitle}
		\small
		\begin{tabular}{|p{0.9cm}|p{0.9cm}|p{0.9cm}|p{0.9cm}|p{0.9cm}|}
			\hline &  &  &  & $\sum\limits^{ }$ \\ \hline
			       &  &  &  &                   \\  \hline
		\end{tabular}
	\end{center}
	\linia
}

\begin{document}
\thispagestyle{plain}
\maketitle

\end{document}