Its a RHD p38 2.5 diesel. Got a damp footwell on the passenger side. I understand if its the heater o-rings its the drivers side so its more likely to be from the A/C. i had a leak last week but cleared the drain and it leaks a nice pool of water under the car if i leave it standing from the a/c so im at a loss, if the drain is clear where is the water in the footwell coming from?