It's the blower motor resistor you're looking for.
It should be located in the main air duct of the air distribution housing just downstream from the blower motor.
Admittedly my information is for a Megane (not a Scenic) but I think they are pretty similar in this area.
Is the blower motor not located on the passenger's side? or am I missing something here.
It's raining here too, and I do feel for you mate! Tomorrow will always be a better day (so my wife always tells me). Trouble is, she's often wrong.