Those clips need to be squeezed rogether while pulled towards the center of the duct. This link should work - there is a tech discussion on removing the bulbs, and the bulb part #. Fresh air vent lite bulbs

Regards

__________________
John

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