I have an R reg scenic which is having the same problems..the footwell on drivers side is puddled and the floor compartment at the back is also wet...passenger side floor is starting to get damp. Going to try the remedies suggested but i have twin sunroofs...just wondering if there is only one drainage pipe on each side which can be accessed via front wheel arch or is there extra ones for the extra sunroof x

Trace, April 2012