Initially wanted to book motel one @ Sendlinger Tor in December. But it got all booked up. Any other recommendations? Near station, Christmas market?
If not, I shall book the Duetsches Museum Motel one.
I recommended the Hotel Blauer Bock near the Viktualienmarkt.
Here is a google photo of the Marienplatz from November 2016. You can see they are setting up the booths for the Christmas Market.
https://www.google.com/maps/@48.1370414,11.5757522,3a,37.5y,185.86h,81.92t/data=!3m8!1e1!3m6!1sAF1QipOYBzeZd2O1SFN_eJPm5vtxOrisNFrjCAjQJ1Vb!2e10!3e11!6shttps:%2F%2Flh5.googleusercontent.com%2Fp%2FAF1QipOYBzeZd2O1SFN_eJPm5vtxOrisNFrjCAjQJ1Vb%3Dw203-h100-k-no-pi17.68751-ya164.99974-ro17.079437-fo100!7i7200!8i3600
There are a lot of hotels south of the Hauptbahnhof, but I am not thrilled by the neighborhood, nor do I think will you. Nothing unsafe about it, but the area near the Viktualiennarkt is much nicer.
I would also recommend the Blauer Bock. If you have the time, Asamkirche (sp?) is just around the corner and worth a look.
According to the Motel One Sendlinger Tor website there's only 1 day in all of December that is fully booked. The other 30 days are available. Are you sure you are attempting to book through the Motel One website? Or you are using some 3rd party hotel booking website?
https://www.motel-one.com/en/hotels/munich/hotel-munich-sendlinger-tor/
Just north of Sendlinger Tor, 2 blocks south of Kaufingerstr. on Damenstiftstr. is Münchnerkindl. I stayed there a few years ago. Other than the fact that it lacks an elevator, it is otherwise fine. It's closer to Marienplatz and the Stachus S-Bahn station and certainly has better prices than some of the others.
Another place I haven't stay at yet, but gets good reviews here from those who have is Pension Lindner. It's real close to Marienplatz, has an elevator, and also has reasonable prices for Munich.