I googled for the story of D-Mark notes being printed, and found many entries indeed: dating back to as early as 2009, saying that the German will reintroduce the new old currency and leave the Euro by surprise on 1st January 2011.

No serious source, though. No mjapor nerws portal. No newspaper. Just some "insider blogs", conspiratory websites, lobbying finance agncies presernting their desires as actual facts. There is even an apparently faked TV news message that by the looks copies the looks of the popular "Tagesschau", but is not, indeed I never have heared of a broadcaster called "KOPP news".
You have fallen for a fake news there, Jim. British media traditionally are hot in sentiment when it comes to Germany. Do not believe every nonsense they print. If the German giovenrment indeed would dare such a coup, they would start shooting at each other in parliament. Especially "Die Linke", the Greens, and parts of the SPD indeed hate Germany existing as a nation - and that is no exaggreation.
But I admit I would welcome such a move of Germany leaving the Euro. It just will not happen. Not Germany. Others, yes. But not Germany. We have far to much a bad conscience for that.
They even want to change the constitution to make it a German self-obligation that it should push for European integration at all cost, no matter what, and the opposition wants to go even further and have the constitution ruling that Germany must pay for once and forever in money
whatever Europe would cost - unlimited guarantees for the debts of all others, that is! The government meanwhile wants to disarm the Constitutional HJiogh Court, so that it can no longer decide on any issues regarding the giovernment'S decisions regarding Europe. The govenrment wants to exlcude both the parliament, and the Constitutional High Court. The court some time ago has ruled that on any further bail outs for others, the whole parliamant needs to be consulted first. This is what brought Merkel up into arms.