Hi TFian's. I recently got the head unit of my Linea MJD 2013 model replaced under warranty. The volume button had somehow become too sensitive. When trying to increase the volume using the control knob on the head unit, the volume used to turn down to zero. I just realised that I may have had this problem right from day one, however I kinda ignored it because I only used the steering controls for all my audio control needs. Even though I managed to ignore it all this while, my wife just wouldn't let me get away with it. Finally she made me go to the service center and have it checked. At first I was fooled by the service center advisor stating that it is a feature, so that you do not accidentally increase the volume so high and manage to blow somebody's ear off. It did not sound very convincing though. May be I wanted to be fooled, so I accepted it, but yet again my wife was not convinced. Her concern was that how can it be a feature when it doesn't look like one. She used to be very annoyed when she had to ask me to increase and decrease the volume everytime as she couldn't do it herself. So this time I took it seriously and went back to the service center and asked them to check again and compare it with other cars. Surprisingly it turned out to be a genuine issue. I insisted on a replacement and got it within a weeks time. I would really thank my wife for this. She was right . Why should we live with a faulty part when we have spent so much to own this beautiful car. It proves that wives can be right sometimes . By the way, please be informed that, once removed, the new HU didn't fit as snuggly as it did earlier. Some of the edge is left out and doesn't fit completely inside the cage. We tried everything but it simply didn't work. I will go back and ask them to try again next time. Also, while changing the HU, I noticed that the HU was made in Portugal. Now why in the world would FIAT wanna do that. Well, sometimes you really can't understand FIAT. After all this, my wife says to me, why can't I change songs from the HU when USB is playing and I am like . Now what do I tell her? We all know that it just doesn't work. FIAT didn't want the co-driver to change the songs . Then she goes, oh really, is that so? then would you mind explaining why it is the case only when USB is inserted and it works just fine when a CD is playing ??? I simply had no answer.. .