Recently i noticed that the outer corner (1/3rd portion of the lens) of the headlamp lens has darkened. Today my car is with the TASS and i referred this to the SA. He claims that it is because of the ageing factor. I checked (along with the SA) all Linea's which came for Service today morning and found that all Linea's had this issue. SA refused to change the lens under warranty/manufacturing defect. It looks like the lens darkens because of the heat generated by the bulbs. Strange that 6+ month Linea headlamp lens discolours so fast. Please check your Linea's and report in this forum. Let us collectively report this issue to FIAT for a replacement, if possible.