The invention relates to a fuel tank (1) for an internal combustion engine (6) and a method for displaying the fill level or fill volume of the fuel tank (1), wherein the fill level or fill volume is determined, a signal correlated with the fill level or fill volume is generated and supplied to a tank gauge (14), and wherein the signal is modified upon a deformation of the fuel tank (1). It is provided that the modification of the signal is triggered during the regeneration of an activated charcoal filter (21) communicating with the fuel tank (1) or in dependence on the opening state of a valve (24) between the activated charcoal filter (21) and an intake tract (25) of the internal combustion engine (6).
