My recently purchased 156 is leaking into o/s/f footwell. Following advice on the forum, I've done the following :
1) Checked the plenum chamber (unable to fully remove scuttle panel trim, 'cos the corner screws were rounded). There was some debris under there which I scraped out, but not as much as has been reported on this forum. I ran water along the panel and water seemed to drian quite quickly underneath the car, so the drain tube appears ok
2) Removed door panel to check membrane and that is water tight, and no signs of water staining on on door card. Put duct tape along membrane just in case
The water in the footwell doesn't smell of anti freeze, so that should dismiss the heater matrix. Also, the aircon isn't used much so don't think it could be the aircon drain tube
Any help would be much appreciated
BTW, what's the purpose of the foam blocks in either corner of the bonnet shuts? The one on the n/s seems mashed up. Should it be changed?