A vehicle having - an internal combustion engine, - an automatic transmission which has an electrohydraulic transmission control, - a transmission oil pump which is driven mechanically directly or indirectly by the internal combustion engine and which, in running operation of the internal combustion engine, pumps oil to the electrohydraulic transmission control via a main line, and - an oil storage device (9.1), - an engine stop/start electronic system which, in operating phases in which the vehicle is temporarily stopped, disconnects the internal combustion engine when predetermined operating parameters are present and starts it when a restart signal is present, wherein - the oil storage device (9.1) is emptied during a period of time after the start of the internal combustion engine, in which period the transmission oil pump is only just building up pressure, wherein the oil from the oil storage device is provided to supply the electrohydraulic transmission control, characterised in that • the oil storage device (9.1) is emptied by the building-up pressure of the transmission oil pump during the period of time after the start of the internal combustion engine, in which period the transmission oil pump is only just building up pressure, • the oil storage device has a cylinder with a stepped piston (10, 10.1) which is arranged displaceably therein and which divides the cylinder into a first piston chamber (9.1) which is fluidically connected to the transmission control, and into a second piston chamber (9.2) which is fluidically connected to an outlet of the transmission oil pump, • arranged in the main line is a check valve which allows a volume flow from the pressure outlet of the transmission oil pump to the electrohydraulic transmission control, and which blocks it in the opposite direction, and • arranged in ∘ a fluid line, by which the pressure outlet of the transmission oil pump is connected to the second piston chamber (9.2), or ∘ a fluid line, by which the first piston chamber (9.1) is connected to a pressure inlet of the automatic transmission, is a device which allows a greater volume flow than in the opposite direction, when there is a predetermined pressure difference in terms of amount at the device in the direction of flow from the pressure outlet of the transmission oil pump to the second piston chamber (9.2) or from the first piston chamber (9.1) to the pressure inlet of the automatic transmission, - an internal combustion engine, - an automatic transmission which has an electrohydraulic transmission control, - a transmission oil pump which is driven mechanically directly or indirectly by the internal combustion engine and which, in running operation of the internal combustion engine, pumps oil to the electrohydraulic transmission control via a main line, and - an oil storage device (9.1), - an engine stop/start electronic system which, in operating phases in which the vehicle is temporarily stopped, disconnects the internal combustion engine when predetermined operating parameters are present and starts it when a restart signal is present, wherein - the oil storage device (9.1) is emptied during a period of time after the start of the internal combustion engine, in which period the transmission oil pump is only just building up pressure, wherein the oil from the oil storage device is provided to supply the electrohydraulic transmission control, • the oil storage device (9.1) is emptied by the building-up pressure of the transmission oil pump during the period of time after the start of the internal combustion engine, in which period the transmission oil pump is only just building up pressure, • the oil storage device has a cylinder with a stepped piston (10, 10.1) which is arranged displaceably therein and which divides the cylinder into a first piston chamber (9.1) which is fluidically connected to the transmission control, and into a second piston chamber (9.2) which is fluidically connected to an outlet of the transmission oil pump, • arranged in the main line is a check valve which allows a volume flow from the pressure outlet of the transmission oil pump to the electrohydraulic transmission control, and which blocks it in the opposite direction, and • arranged in ∘ a fluid line, by which the pressure outlet of the transmission oil pump is connected to the second piston chamber (9.2), or ∘ a fluid line, by which the first piston chamber (9.1) is connected to a pressure inlet of the automatic transmission, ∘ a fluid line, by which the pressure outlet of the transmission oil pump is connected to the second piston chamber (9.2), or ∘ a fluid line, by which the first piston chamber (9.1) is connected to a pressure inlet of the automatic transmission,