SL55/63/65/R230 AMG: 2009-2011 SL63...do they have HID fog lights or are they halogen?
hids usually produce too high wavelenght light (4800k or more) which will bounce off the water droplets in the air in fog conditions. the resulting light dispersion is unfavorable as it produces too much reflection glare and shallow distance penetration.
thus hid foglights are actually a step back optically speaking compared to lower wavelenght "regular" beams.











