The only place I found that had the vacuum servos on the Euro lights was http://www.europarts-sd.com/
, and they were used from a gray market car. I don't know if he can get new ones with vac servos or not. Also, the July/August Star article on headlight conversions to Euros describes the Hella part #s and MB #s for Euro lights with vacuum servos, and describes the installation for 86-89 models. The article also refers to the Star Tech editor having installed 500E euros on his 400E with the vac servos. If you want, I can give you info from the article, or the name and address of the Tech Editor. I was never able to find 500E euro lights when I did my install.
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