Good morning your car expert, Slowly I get impatient as the damage has still not been found and the used car warranty is over in July. We bought the Leon in July 2019 at Seat in Hanover, since that already attracts… Our Leon 2.0TDI, 150hp, EZ 2013, km stood 143500 has coolant loss. 3 workshops have already tried to find out without having to find out (seat and 2 free) in response I get to continue driving and watching. Seat h at on guarantee the coolant container lid replaced from blue to black. This pushes the coolant out of the container (overpressure valve) only if you have longer distances on the AB or in summer when the engine is relatively hot. In winter we only have to refill once and that is after a 3 hour highway ride. In summer I have to fill about every 2 weeks after. I never filled up the coolant over max and always with cold engine. I hope that I do it so halfway Thank you for your help LG Florian