His call, in a newspaper article as he arrived for a three-day state visit, highlighted the gulf Erdogan must bridge if he is to fix strained political and commercial ties.
In May, 2016, the 14th High Criminal Court in Istanbul had convicted Dundar and Erdem Gul, another journalist of the daily, following the publication of images purporting to show arms being transported to Syria in trucks belonging to Turkey's National Intelligence Organization, also known as the MIT.
Turkish President Recep Tayyip Erdogan says Turkey expects closer cooperation from Germany against "terror" groups, including Kurdish rebels and people with alleged links to a failed 2016 coup in Turkey.
Regardless of "whether it is a legitimate concern or not", the government does not tolerate any demonstrations of a political nature at press conferences held in the Chancellery or the German parliament, he said on Twitter.
Russian Federation and Turkey agreed last week in Sochi to set up the buffer zone around Idlib, the last major rebel stronghold in Syria's seven-year war.
Erdogan said he has no right to criticize the German judiciary and Germany has no right to criticize the Turkish judicial system.
As Erdogan was whisked through a locked-down city to his hotel by the Brandenburg Gate, allegations that a Berlin police officer had been spying on exiled dissidents for Turkish security services highlighted the two sides' mutual mistrust.
"There is, on the one hand, a common strategic interest in good relations, and on Germany's part too an interest in developing these relations", she said.
Ian Wright names the man to blame for likely Aaron Ramsey exit
Ramsey, 27, has been at Arsenal for more than a decade and holds the distinction of scoring the winning goal in two FA Cup finals. That means Ramsey, who has been at the club since 2008, is likely to leave on a free transfer at the end of the season.
Merkel said at a news conference alongside Erdogan Friday that she "pushed, and will continue to do so, for these cases to be resolved as quickly as possible". The most prominent have been released, but five remain in Turkish custody.
Dozens of German citizens were among those imprisoned after the alleged coup attempt against the President two years ago.
She said authorities were looking for suspected coup plotters that Turkey wanted extradited, but said she and Erdogan had differing views on topics including press freedom. That sent Turkish-German relations into a tailspin.
But several opposition leaders are refusing to attend.
Asked about Dundar's absence, Erdogan described the former editor as a "spy" who should be extradited to Turkey.
Erdogan is eager to use his three-day visit to rebuild trade ties.
"This visit isn't a sign of normalization", Erdogan's host, President Frank-Walter Steinmeier, told the RND newspaper group.
But they've clashed over numerous issues to the point where Erdogan accused German officials of acting like Nazis, prompting Chancellor Angela Merkel to condemn the Turkish president's words.