I have a Citroen C5 HDI165 (X7 from 2011) and just replaced the air filter.
In a few days I want to replace oil + oil filter. How ever, I just tried to fit some of my wrenches / nuts on the on the oil-filter-cap and it feels like nothing fits perfect ?!
Is it a middle-size or any "special size" ? Or did I simply not put the nut/wrench on it correctly?
Can anyone tell me what tool / size I need to open that damn thing?
Thanks !
