W140 sedan yellow fog lights

[sixto]

I saw this ad in eBay -

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=2479487626&category=6336&sspagename=WDVW

and noticed that this 94 S420 has yellow fog lights. My 95 has white fog lights. Are these Euro headlights? Were yellow fog lights an option?

Thanks,
Sixto
95 S420
87 300SDL