Congratulations, you've 'seen the light'! I used to use the Hella yellow stars H# bulbs before they stopped making them. Now I am told only the PIAA Ion Crystal gives of the yellow light and comes in stock wattage.
BTW, did you see this link about a clean 280SEL 4.5 around the corner from me?
280 Sel 4.5
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