Germany-Switzerland pass?

Hello floppyhazel, and welcome to our forum! My advice would be not to purchase a Eurail Germany-Switzerland Pass. I suspect that your journeys in Germany won't be long and therefore expensive enough to make this a cost effective solution. Moreover, the Eurail Germany-Switzerland Pass would still require quite some extra payments. Urban transportation (for example in München and nearby cities) isn't included. Buses aren't either, so you'd have to pay extra for the bus trip between Chur and Laax. The Jungfrau railways are not for free, but discounted. In all, I think this plan is more economical:

- purchase a local card for your public transportation in and around München. An overview can be found at this page;
- purchase a regular train ticket for the trip from München to Zürich;
- use a 4 day Swiss Saver Pass for you stay in Switzerland from December 9 until December 12;
- purchase a regular train ticket from the Swiss border (as the Swiss part of this trip will still be for free with your Swiss Saver Pass) to München.

Regular train tickets between München and Zürich/the Swiss border can be arranged for through the Swiss timetable. Fill out your destination, your arrival station and the correct date. Next, pick your preferred connection and click 'Fare/Buy'. You'll then enter an order process. In most cases, regular train tickets can be ordered along with your Swiss Saver Passes as well.

Only exact calculations, which would require you to know exactly which trips you want to make, can provide a definitive answer to your question. Instructions for this can be found in our rail FAQ. I hope this helps a bit, though. Good luck on your further decisions and feel free to come up with other questions!