Although a surprise can not be ruled out in the wake of any Russian interference, pollsters say they are confident about their surveys, which show Ms. Merkel's conservatives winning the most seats in the Bundestag lower house.
Citizenship applications from Britons leapt by 361% in 2016 as a record number of nearly 3,000 United Kingdom citizens became German, a figure that is is expected to be considerably higher this year, according to Germany's federal statistics office. The two are traditional rivals but have governed together in a "grand coalition" of the biggest parties for the past four years. "Having been on the sidelines politically for quite a while now, I'm glad I'm finally able to exercise my right again".
Confused? That's OK, many Germans don't really understand exactly how it works either. The Madrid government is seeking to arrest the elected political leaders in Catalonia and to ban the referendum they have planned for 1 October on Catalan independence. In fact, for months, it has felt like a long set-up for a foregone conclusion in Sunday's (24 September) vote: A fourth term for Angela Merkel. Such a coalition would promote a strong Europe and focus on fighting climate change.
Mr Schulz, 61, a former European Parliament president and leader of the centre-left Social Democrats (SPD), will take to the stage in a central Berlin square in a last-ditch attempt to turn the race in his favour.
But with unemployment hovering at an all-time low - it reached 4 percent in May - the issue is playing a far smaller role in this year's vote than in previous elections.
Despite that prospect, Merkel has steadfastly declined to back away from her resistance to setting an upper limit on asylum seekers, a key demand of conservatives in her own camp.
Each voter will have two votes, one for district representative and one for a party to enter the Bundestag.
"I'm concerned children will say: 'What?"
Germany's federal election campaign has been refreshingly boring.
"My request to everyone is that they vote, and vote for those parties that adhere 100 percent to our constitution", Merkel told MDR radio this week in a clear reference to the far-right party.
Issues close to her heart that will sway her decision include refugees and education.
In particular, the party has set out a decidedly eurosceptic stall.
"On the one side, Ms Merkel provided a safe cushion for Germany for 16 years, but on the other, it created huge boredom and political apathy with politicians losing the sense of how challenging and competing politics can be". There is no precedent for this on the federal level, but the three parties now work together in Schleswig-Holstein, and have done since earlier this year.
Merkel, by contrast, has stuck to her position that Germany - and for that matter the rest of the European Union - has a moral obligation to welcome refugees from the terror-torn Middle East and northern Africa, and scoffs at the notion that some of the influx of newcomers have terrorist ties. "No one has talked about that enough". Indeed, given the situation in the rest of Europe and the chaos in many parts of the world, the Germans are thankful for Merkel's steady policy approach and ability to weather challenges. On Thursday - four days before the crucial vote - some of the top German national papers did not even mention it in their lead stories. The first one is for a candidate in their regional constituency. "It requires a lot of thought as to how you place yours", she says. The latter party has pledged to ballot its membership on any coalition deal, which could be tricky if it performs very badly.
Younger generations are also underrepresented in the political apparatus.
At EuVisions, we have recently followed two weeks of the German electoral campaign on Twitter, collecting more than 200,000 tweets. "I'm of the opinion that things should be different". She seems easily influenced.
Due to their views on immigration and integration, as well as the European Union, all the other parties have ruled out dealing with them.
Following the torrid reception performance in an AfD stronghold, Merkel also received a hostile reception at her evening engagement in Brandenburg an der Havel, a German town west of Berlin, where AfD held a rally just ahead of her arrival.
"Altmaier's declaration is tantamount to admitting political bankruptcy and reveals his disturbed relationship to democracy", she said.