The engine on my 2010 diesel Octavia is very slow to warm up so it takes quite some time for heater to warm up so last year I bought and fitted a winter grille cover from superskoda .com which has done a lot to help engine get up to temperature quicker. Before fitting it could take up to 10 mile in cold weather to get any heat from heater, since fitting down to about half that distance.I have spoken to dealer and was told that this was a problem with diesel engines and also been in contact with