Abstract: A vehicle is described, the body of which comprises at least one cross-member delimiting a vehicle engine or luggage compartment and defined by a box structure which is made fluid-tight to retain a liquid in its interior, and is provided upperly with a filler closed in a fluid-tight manner by a removable stopper, and lowerly with means for withdrawing from the interior of said box structure a liquid contained in it, so that the box structure acts as a storage reservoir for a wash liquid for the vehicle windows.