German Chancellor Angela Merkel has said, she plans to serve another full four-year term, despite growing criticism within her conservative ranks of the sweeping concessions she made to hold onto power. <br/><br/>The veteran leader said that despite the sniping over a poor election result and the loss of key ministries in a fresh coalition deal, she felt no loss of authority and wanted to stay at the helm of Europe's biggest economy until 2021.<br/>'<br/>Merkel told public broadcaster ZDF that she naturally planned to stick with her pledge to stay on for another four years, rather than make way for a successor before the end of the term. <br/><br/>Merkel won September elections but fell short of a clear majority. After a grueling marathon of negotiations, she managed on Wednesday to forge another grand coalition deal with the centre-left Social Democrats, who however, extracted a high price. <br/><br/>The SPD snatched the powerful finance, foreign and labour ministries, as well as justice and environment from her party.<br/>