Hello, I wanted to change the cooling fluid, since it is already as old as the car, so 10 years… Can’t find anywhere which coolant/freeze protection I need. Manual says nothing, only the quantity, online I found nothing concrete, I’m shown everything possible for my car, i.e. G11, G12, G13.. What makes all this even more difficult, I have a yellow in it right now, which is very rare. Can someone please help me?