Lots of info on these issues in the archives. Just a few of the threads that may help:
Help! Fresh Air Vents, ilumination lamps? 87 300e
Headlight Switch night lighting
It may or may not be different on the 96, but this should give you a starting point.
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E