Hi Mercnut, I agree with you. paying so much money for a high end car and does not expect the LED light to fog up. and is totally embarrassing in the car park when a same GLC park next to mine and his light are clear. so the fogged up has been gone for couple of days now (thank god) but sometime on a wet day or after we wash the car it appear again. Contact mercedes and they've ask us to bring it in for them to see.