[. . . ] assembly instructions Instructions for safe use and maintenance · · · The bottom position of the base is the safest. [. . . ] If any parts have become worn or damaged then do not use the cot/bed, seek advice from your retailer or call our Customer Care Helpline on: +44 (0)845 268 2000. Do not use replacement parts that are not recommended or supplied by Mamas & Papas. Do not place your cot/bed in the close proximity of an open fire and other sources of heat, such as radiators, electric or gas fires. For reasons of safety we only recommend the use of the Mamas & Papas size 400 mattress for this cot/bed. The mattress should be no more than 40mm shorter or narrower than the internal length or width of the cot/bed. The thickness of the mattress chosen should be such that the internal height (the distance between the surface of the mattress to the upper edge of the cot side) is a minimum of 500mm when the base is set in the lowest position and a minimum of 200mm when the cot base is set in the highest position. [. . . ] Check that all of the fittings are fully tightened before using the junior bed. [. . . ]