In the HID thread rick.kristin mentioned that a dealer did not want to look at a clunking noise on his neighbour's car because he replaced the OEM H7 Halogens with H7 HIDs (i.e. he "modified" the car). Anyone else had similar experiences or know of similar experiences? Does this mean that one is not allowed to add mud guards, or carpets in the car. How about tinting the windows? Replacing the OEM H7 bulbs with blue tinted H7 bulbs? Where is the line drawn? Is there some official print that we can take to a dealer if they want to use similar arguments?