This getting way too technical! Check out http://www.DanielSternLighting.com
for a scholarly series of treatises on this subject.
I can tell you that there is NO similarity between the lenses on my old NA headlights and the new E500 E-codes: glass vs. plastic. For sure.
1986 190E 2.3-16 (Decomm rear self-leveling suspension; Euro-code headlamps) sold
2004 Audi S4 6-spd - sold
1969 (2) and 1980 Porsche 911T, S, and SC - alas gone
1987 300SDL - Graf Spee; Euro-code headlamps; 16-inch 8-hole wheels - sold
1994 E420+(E500 suspension/E-code headlamps/PAD chip) sold
1968 250SE 4-speed (NICE car) - long gone
1962 220S 4-speed/column mount - long gone