2011, 329FBH, 5er. The front bunk house room has a fold out bed which has a built in pump that simply plugs in.
The LR area has a sofa bed that is different. It is the Aero bed mentioned. The ISSUE with my Aero bed is the pump works from a fully charged battery and needs to be charged BEFORE using. A royal PITA.
The good news; both beds are comfortable and EZ to inflate and deflate. The pumps on both are in the folded bed. The Aero bed pump was in a separate bag folded into the bed. Once used; I now stow the pump in a more readily available place so I can anticipate the need to charge it for several hours before needing it.
Next time you get to your RV, determine type of pump and go from there.
My Aero bed pump will NOT work directly from plugging it in. It has to be charged.
Not a big deal here, but, check it out and not be "surprised" at 11pm like I was with 7 people sleeping in our 5er.