Not sure if a mk2 focus will have the same issue but my mk2 is doing it. The problem is the tray under the plastic scuttle panel. The seam sealer must be porous and water weeps through it. Took me ages to find. I had a bore scope right up under the dash. I put compressed air through it and you could see it bubbling. Absolutely crap build quality lol I’d be well pissed if I had a 20 odd grand RS