Thank you to everyone who replied. I tried testing the low switch (by the dryer) and the fans didn't work. Just when I was about to give the fans a 12 volt, I realized that I haven't checked the relays yet. Being a newbie to benz cars, I had to research where the relays are and eventually found it. Luckily I saw that 2 fuses on top of the relays where blown and therefore just simply replaced them. Now everything is fine. The question that bugs me though is what caused it.

Again thanks guys.