The gas tank leaked (it burst). We did not look for the cause of this condition, we just changed the tank, but there were problems with the engine (the car was twitching while driving, with a full tank). Again, without understanding the causes of the problem, they changed the gas pump, which did not fix the problem. Fearing unjustified replacement of other spare parts, they did not contact this service. Thanks to the specialists at other service stations for being able to find and solve the problem.