So i had a Mercedes CLA220 2016 and that after driving in rain started to have the same issues. I now have a W213 2017 E220 coupe. Been absolutly fine then the last weeks heavy rain smells back. Its smells damp. Checked carpets, checked matts, checked everywhere for a possible leak, but nothing. I have just checked the filters engine side and cockpit and they seem fine. Anyone else having issues. Popped online and seems the US have had a few law suits going on. 2 airfreshens and half a fabreze bottle later slightly better but still significant to warrent this. Anyone????