hamburg return birthplace chancellor angela merkel urge supporters mobilize undecided voters sunday election tell take conservatives solid lead opinion poll grant survey show many voters still undecided election likely return fracture parliament want maximize support bolster position coalition negotiations hear last days unbelievable ... everything already decide 63-year-old tell crowd several hundred pack fish auction hall hamburg every vote count note center-left social democrats spd close rival rule left-wing coalition leave party environmentalist green tie-up untested national level merkel add live turbulent time afford experiment time need stability security clear path home abroad say merkel speak hamburg band pump crowd belt celebration kool gang bryan adams summer 69 one two grey supporters stand dance spd leader martin schulz tell broadcaster rtl believe could still last-minute swing party favor experience elections national international show number undecided people grow schulz say everything still possible win would run opinion poll tuesday weekly survey conduct forsa show support merkel cdu/csu bloc know union 36 percent low since april still far ahead spd 23 percent attention germany largely turn merkel govern election rather whether stay power late survey suggest another grand coalition merkel conservatives spd nationwide untested three-way jamaica alliance conservatives fdp green would stable majority coalition involve fdp could limit room maneuver press ahead euro zone reform without detail want develop eu merkel deliver impassioned defense european project say regret britons vote leave bloc could stand talk hours arduous europe often say add always worth stand europe even give us peace freedom 'it 's yet merkel warn supporters vote