MUSA circuit in winter

Hello MUSA friends! Today it was time again, the temperature DEUTCHLY below zero degrees (precisely: -11°!) and my MUSA resists switching. Gears go in very hard, after a few minutes drive everything is ok again. What exactly freezes there? And can you (or wife or workshop) get that somehow “easy”? My MUSA is from 2007 (1.3er 16V Multitjet). Thanks in advance for answers – despite the pre-Christmas shopping stress for the guys – says the Bee