BERLIN (Reuters) - Germany's main opposition leader Peer Steinbrueck accused Chancellor Angela Merkel of covering up the likelihood that German taxpayers will have to fund further euro zone bailouts due to a looming election. Steinbrueck, who is lagging Merkel in the run-up to the September 22 vote, was quoted by a German magazine on Saturday as saying a fresh writedown on Greek debt would mean losses for public creditors, in other words taxpayers. ...