Information from Abfallwirtschaft München (German link):
Due to the heavy snows the garbage trucks are not able to access most streets in Munich, or the bins cannot be transported to the streets for pick-up.
If the bins are full you are allowed to stack garbage in proper (= heavy duty, not shopping bags), closed garbage sacks next to the bins. The same goes for organic garbage if your organic bin is full. If your paper bin is full you are asked to bring the paper to the Wertstoffhöfe.
The junk yards (Wertstoffhöfe) will make an exception to the rule and accept household garbage, also in proper sacks.
If you do not want to attract scavengers to your neighborhood (stray dogs, cats, racoons, rats) by putting your garbage next to the bins, store it in your apartment. Word to the wise.
