Has anyone ever experienced and solved a trickle of water coming down onto the floor on the left side of the centre console, from the area above/behind the heating vent (below knee level)? I am fairly sure it is rainwater as it has no taste and it only appears after heavy spells of rain! Are there any known weak spots? Windscreen has not been replaced during my 4 years of ownership but was replaced by previous owner. Thanks in advance for any suggestions.