After a really hard frost this week I lost DAB reception but still had AM/FM. I drove about 10 mins and parked the car up in full sun. Went back to the car an hour later and DAB was back. I must admit to using a defrosting technique passed on by an old neighbour many years ago - if the car is on a drive, simply run an extension lead to a fan heater in the car on minimum setting (1KW) and leave for 10-15 mins. Not only are the windows cleared, the interior is nice and warm when you get in! I suspect that the loss of DAB was due to condensation in an aerial connection, which was cleared by letting the car warm up in full sunlight. My question is - where is the DAB aerial? Is it in the shark fin or is that just for GPS? Or is it in the rear or side windows (the car is an Avant)? Has anyone else experienced loss of DAB?