The bulbs are actually Silver Vision by Philips, and are 'half silvered' so that they appear silver when off, but the amber shows through when on. Many members have done this themselves with some chrome paint on stock amber bulbs - try a search to find the threads from a few weeks ago, or look for at the site http://www.fosmo.com/
for more bulb info.
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