Massive amounts of multimedia data are stored in databases supporting web pages and servers, including text, graphics, video and audio. In this braking system, there is provision for the pressure store to be able to be coupled in fluidic terms to an intake side of the pressure source by means of an interposed actively controllable multi-way valve, in particular a two-way solenoid valve, and for the pressure store to be able to be decoupled therefrom. % of a mercapto-carboxylic acid or one of its salts; and 1 to 10 wt.