Zidan grabbed the equaliser with a close-range shot nine minutes from time after combining well at the edge of the box with Tamas Hajnal and Nelson Valdez.
The striker's first effort was saved by keeper Faryd Mondragon and he fell on the follow-up, clearly knocking the ball into the net with his hand and the effort was disallowed.
Cologne had a monopoly on chances after the break but were denied by a combination of poor finishing and fine keeping from Neuer.They were also eliminated from the Champions League competition as well as the UEFA Cup and last week were knocked out of the German Cup quarter-finals by visiting second-division Mainz.Kuranyi.
