The illustration on pg 78 of my Owners manual shows a screw driver blade being inserted between the black frame of the assembly and the headliner. The instructions say: "...Push the lamp assembly to the right (passenger side), lift off the cover (which includes the sunroof switch, seatbelt lights, and light switch) on the left side with a screwdriver and pull the lamp assembly out." I tried it, and it takes a fair degree of pressure to the right, and an equal amount of downward pull on the left hand edge, but it came out succesfully. Re-installation was the reverse of removal, also requiring a fair degree of pressure.
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