In 1999, he accompanied the indie-rock band Tocotronic on their K.O.O.K-tour and he wrote a tour diary called Wir könnten Freunde werden ("We could become friends").

In 2005 he shot the film Keine Lieder über Liebe (No Songs of Love [de]) with the German actors Jürgen Vogel and Heike Makatsch.

In the summer of 2011, striking out as a solo act for the first time since the incarnation of his rock band Tomte, Uhlmann featured on rapper Casper's 2011 album XOXO.

In an interview with Rolling Stone, Uhlmann stated that after a major performance with his band, each member went their own way to work on different projects: "It [the album] would certainly sell better if I could say that there were terrible fights, and then in six years there will be some a reunion special, but it wasn't like that.

März (On the 7th of March), parodies pop culture and major milestones in history including the fall of the Berlin Wall, the films of Spike Lee, and the recording of "We Are the World".

Simon Langemann of Laut wrote of the album that Uhlmann & Band had matured and refocused their direction, stating that the end-result is, at times, more successful than the first record.