Two of my bigger upcoming projects on my '99 420 will be to replace the a/c and the water heater units, both of which are under the setee.At first I thought they'd come out after unbolting and detaching wires and hoses, but the settee frame is preventing them from simply being lifed out. In fact I can't even get to some of the hold-down screws because the units are so tightly situated.If I tear apart the entire seating area, I would have to not only remove screws but I'd also wind up cutting away some of the frame, which I'm hesitant to do. Am I missing something? Is there a secret to removing the settee?