A method of checking status of a mobile station in sleep mode is provided. A tarpaulin may be mounted thereon so that the frame members, flexible member and tarpaulin are pivotable between a covered position atop the open top container and an uncovered position. According to the invention the vegetation element is characterized in that the support is a net, a woven or knitted fabric, a randomly bonded nonwoven or a fibre mixture which can be deposited on natural or artificially produced mineral soil. A second end of the rotating member is detachably latched to the cover.