I'm confused with this, are there any combustion gasses in the carter and why do they need to be filtered?
What is the Carter gas filter, where is it located and what is its use? Is there a way to estimate if it is for change?
Here is a diagram showing where it is located on BMW engine:
and here is what it looks like:
I really can't understand what it is for?
Gas like combustion gasses, not like benzine(gas).