I'm staying at the Munich Marriott as I read this. I'll agree with the comment from DENROC.....typical Marriott. The California Grill does a great breakfast buffet and offers a relatively upscale evening dining experience. The Champion's Sports Bar draws a lot of locals watching the incessant soccer on the various screens.
There are not a lot of dining choices in the immediate area unless you jump a cab....they always have a dozen or so lined up outside...or take the U6 subway downtown. The subway is just a couple blocks away.
Enjoy your visit!!