Winter Tires sign

[grzes]

Hello,
What sign must be on tyre in Germany right now ?
I have heard that winter tires ale obligatory so M+S is enough or also the Snowflake ?

[Spüli]

M+S must be, the snowflake is a option

You only must have M+S if the street is slippery.

[grzes]

so Cooper STT is ok