I removed the heater panel in about 5 minutes, or less.

Took an air cut off tool, and cut the little plastic piece, under the
vent of the heater,  that  serves no real purpose except to make the
removal of the box all that much more difficult----

Taking out the back seat is way too much work, just to get to the
heater----

Later,

            ______________
           |[  ] [  ] [ ]\
           |    |    |    |
     ~~~ ~||-(())----(())-|

Terry--

       "Zoom, Zoom, Zoom"
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~