Hi to all, I am in urgent need of help to solve a coolant loss problem on my 2013 Seat Leon diesel 184!! Ever since I bought the car 6 months ago i keep getting a low coolant warning message every now and then. When i check the expansion tank it is completely empty and it looks like all the coolant is around the tank. This coolant loss could happen once a month or even twice a week!! I replaced the expansion tank and the cap but to no avail. My mechanic did a pressure test and that came back fine. There is no contamination in either the coolant or the oil. There is no smoke out of the exhaust. I have no wet carpets or damp in the cabin and i have no visible leaks as the car is parked in a garage most of the time. The one thing i noticed is that the car takes quite a long time (in my eyes) to warm up (a good 15 mins to get to 90 degrees under normal driving). I always check the coolant temperature and it never goes over 90. This is driving me crazy, my mechanic has been no help, and I could really use some help. I don't want to go down the path of replacing perfectly good parts if it won't solve my problem. Any ideas or if the same this has happened to you would be GREATLY appreciated!! BTW my car is a 2013 Seat Leon FR 2.0 TDI 184PS.