VladCor

Thank you very much for the info, I'll pass that to my mechanic.

Does this contribute to the coolant loss or to the heating system? I also found some impurities in the coolant (fine particles), does it matter if you use G12 or G13 in the 2.0 diesel 150bhp - 2016? Because the manufacturer recommends using the G13 but my mechanic said that it's nearly the same as G12.

Still have the same problem here, I loose coolant while driving, it doesn't really matter if I drive with high speeds or not. It seems that the pressure is too high and I'm having leaks just under the coolant tank, sometimes I loose about 200-300 ml, sometimes nothing at all, it's quite strange as it doesn't leak under the same conditions. Another thing I realized since I have this problem is that my heating system doesn't work anymore, even if I put it on 30 degrees, it's still cold in the car.

Would a new EGR valve stop the coolant loss? I'm having the same problem on the 2.0 TDI 2016, replaced the water pump but still loosing a lot of coolant, especially when I go at high speeds. My mechanic also said it may be from the cylinders, any thoughts?