Will A LHD Passengers Seat Fit Into A RHD Car?

[Inspector]

I need to replace the drivers seat in my RHD 1996, W124, E320 Cabriolet. Thought I could use a passengers seat from a LHD car if it would fit in term of the electrics. I have heated, electric, memory, mushroom leather.

Questions are,
Will it fit and have all the options work
I assume it will except for the memory as I am not aware of memory for a passengers seat unless the memory function is in the car and not in the seat, does anybody know for sure.
I would like to have an orthopaedic seat which requires a vacuum operated pump. Does the pump sit under the rear seats as in the sedans or is it in the seat already. If it is in the seat is it just a matter of teeing off the vacuum line for the seat lock.

Very much appreciate informed advice, regards to all, Inspector.