Finding the apartment 1+ room / Share if condition is nice.

Dear friends,
I need to find an apartment in dusseldorf.For time being I am living in one of the company place which is provided by my company in dusseldorf.I am looking for a decent One room + apartment in dusseldorf which could be in central of city or nearby the Vodafone office in Amsteern or which could connect the line of the HBF whereas I can talk the S ban to office .
I prefer the apartment which has kitchen /internet and not too much noise from the tram running track which is alone the road.
I would be great help if you could reply me .
Stand alone apartment :40 M Sq. or share depends on the locataion and size or room and rent conditions.