Hi Phil, Just read your fault and had exactly the same problem, We checked the drainage tubes in the wings, the rear washer hose under the carpet, added a little bit of plastic to the pollen filter to stop any splashback...!!! even got a new windscreen thinking it was the seal.!! Turned out to be the heater matrix..!!! Look up behind the center consoul... see any water..??? can you smell antifreeze in the cabin..?? If so then its dash out time, matrix was