Bought my w205 c200 cdi 7g-tronic (year 2015 model) at summer, and now when the weather has got a bit colder, seems that my car has developed a new noise that bothers me a lot. It is only hearable when engine is cold and even then at low rpms, around 1000 or so. I recorded the sound and EQ'd it a bit so it can be heard clearer.

Has anyone any idea what could be causing this:
https://drive.google.com/file/d/1PcZ...tpiHAT14u/view