BERLIN (Reuters) - German Chancellor Angela Merkel on Monday said she saw no reason to resign after the collapse of talks about a three-way coalition government, adding her conservative bloc would enter any new elections more unified than before. Merkel told German broadcaster ZDF she was ready to serve four more years as chancellor, and felt it was important to send a signal of stability for the country and Europe and the world. Asked about the possibility of another  grand coalition  with the Social Democrats, Merkel said she would wait to see the party s response after their talks with President Frank-Walter Steinmeier on Wednesday. But she said any demand for her to step down would not be a good way to start a new coalition. She said she was disappointed by the decision of the pro-business Free Democrats to pull out of the coalition talks, but did not expect the party to reverse course. 