I have them on my 560 SEL. Got them on Ebay. Even the Japanese bulbs are not bright enough to resemble the headlights. Raybrig 8/35watt and I forgot the other one's name. One is clear filled with Xenon gas and the other one is supposedly the same but, tinted somewhat. I suggest the 15/50watt bulbs. They are better. Have to get those.
As for installation, just look in the engine bay. There is a white turn wheel and you can just unscrew it by hand. Push the corner light forward and out it comes. It is very ez.