REUTERS/Thomas Peter
The first results print at noon eastern.
Incumbent Chancellor Angela Merkel's largely liberal (the Europe version) coalition, is expected to remain in control for a third term.
But there are two spoilers to look out for, as our Matt Boesler has highlighted.
One is the leftist Social Democratic Party. Polls show there is a good chance they could wedge their way into Merkel's coalition.
If they do, SocGen has said, they are likely to ask for more taxes to fund social programs, putting a drag on German (and potentially Eurozone) GDP.
The other wildcard is the Alternative für Deutschland (AfD) party.
They are anti-Eurozone, and if they do well, it will likely come at the price of Free Democrat votes, the main coalition partner for Merkel's Christian Democrat party.
If AfD gets more than 5% of the vote, according to the Guardian, the coalition could fall apart.