Yes my E89 froze out this morning and it was just -1 celcius ...we have another week of this in southern England! I have to say my very old E36 does this too and eventually it stopped my drivers door mini-dropping! I used to get Gummi- Pflege and it didn't help with the E36 but have tried it with my Z4 this evening - I suspect it'll have to be warm water in the morning again?!