A method for mounting a cover with a plurality of slidable lids onto a storage compartment of a refrigerated merchandising storage unit for display and sale of foodstuff or the like, which storage compartment has a substantially rectangular top opening, wherein the method comprises the steps of: - providing two or more cover cassettes , each comprising one or more slidable lids , two cross profiles arranged along two opposite sides of the cover cassette , respectively, and two base profiles arranged along two opposite ends of the cover cassette, respectively, perpendicularly to the cross profiles , each cross profile or each base profile comprising one or more elongated and generally U-shaped tracks , each of which is arranged for receiving an edge of a slidable lid in such a way that the slidable lid can be slid along a longitudinal direction of the track - mounting the two or more cover cassettes on top of the storage compartment in such a way that two opposite ends of each cover cassette rest upon two upwards-facing edges of the storage compartment , respectively, and in such a way that the two or more cover cassettes together form a cover of the refrigerated merchandising storage unit wherein the method further comprises the subsequent step of: - mounting along each of the two upwards-facing edges of the storage compartment , onto which the two or more cover cassettes rest, a cover profile , which is arranged to be able to engage releasably with the base profiles of the two or more cover cassettes . wherein the method comprises the steps of: - providing two or more cover cassettes , each comprising one or more slidable lids , two cross profiles arranged along two opposite sides of the cover cassette , respectively, and two base profiles arranged along two opposite ends of the cover cassette, respectively, perpendicularly to the cross profiles , each cross profile or each base profile comprising one or more elongated and generally U-shaped tracks , each of which is arranged for receiving an edge of a slidable lid in such a way that the slidable lid can be slid along a longitudinal direction of the track - mounting the two or more cover cassettes on top of the storage compartment in such a way that two opposite ends of each cover cassette rest upon two upwards-facing edges of the storage compartment , respectively, and in such a way that the two or more cover cassettes together form a cover of the refrigerated merchandising storage unit - providing two or more cover cassettes , each comprising one or more slidable lids , two cross profiles arranged along two opposite sides of the cover cassette , respectively, and two base profiles arranged along two opposite ends of the cover cassette, respectively, perpendicularly to the cross profiles , each cross profile or each base profile comprising one or more elongated and generally U-shaped tracks , each of which is arranged for receiving an edge of a slidable lid in such a way that the slidable lid can be slid along a longitudinal direction of the track - mounting the two or more cover cassettes on top of the storage compartment in such a way that two opposite ends of each cover cassette rest upon two upwards-facing edges of the storage compartment , respectively, and in such a way that the two or more cover cassettes together form a cover of the refrigerated merchandising storage unit wherein the method further comprises the subsequent step of: - mounting along each of the two upwards-facing edges of the storage compartment , onto which the two or more cover cassettes rest, a cover profile , which is arranged to be able to engage releasably with the base profiles of the two or more cover cassettes . - mounting along each of the two upwards-facing edges of the storage compartment , onto which the two or more cover cassettes rest, a cover profile , which is arranged to be able to engage releasably with the base profiles of the two or more cover cassettes . <EOS>