Our 2011 Eagle 351RLTS has the same L couch.
On it, the sofa part opens up like a fold out sofa, there is a air mattress under it and a built in pump. All you do is operate the switch and it inflates or deflates, depending on which way your operate the switch.
In 7 years we have used it for grands a few times and it was satisfactory for children.
2011 351RLTS Eagle, Mor/Ryde suspension & pin box, PT50C EMS
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS
2017 GMC Terrain (future TOAD)
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