Did it a LOOONG time ago, so i'm going from memory.

1. Pull headlight switch carefully...should pull all the way out.

2. remove nut from exposed shaft.

3. Gently pry plastic surround from dash...this will completely expose the headlight switch for removal.

4. Disconnect wiring from old switch and replace. Note that there is a bulb on the tip of the shaft that illuminates the switch when the rear fog light is on. The new headlight switch may not have one, so swap that out too. The bulb is tiny, so you need surgical precision to pull it out without destroying it.

5. Install is reverse of steps 1 thru 3.

__________________
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car