I have a slight coolant leak, about 1 liter per month and i am struggeling to find the reason for the leak. I took off the wheel on passanger car and opened up from there and found the following (Check image).

Is this hose part of the coolant system or is this not where the error is? i really struggle to find the leak. i suspect its just a hose.

dripping from the underside of red hose with the clamp. but also wet on top of the hose. clearly coolant dripping.

the oil "dirt" you see from here is from an old oil leak i think. Can you tell me what it is connected to?

 

That looks like it.

Pressure test it?