Na, I think that they do look good on some Mercedes cars.
http://www.lexuslights.net/index.php?cPath=57
Opinions vary.....as they should
Check out my lights on my C230K I too thought that Lexus style lights would look good on my W202, when I ordered them I asked for "white rear lights" instead of "clear" and when they arrived you can see what I got, not sure what other Mercedes owners think but probably not a lot different to my colleagues at work thought.
But as I paid nearly £200 for them they were gonna be fitted and I would have to like them!
Yes I agree OEM things are the best, for instance if you have a Merc putting AMG or Brabus mods on and for BMWs Alpina and AC Schnitzer are good examples.
Sticking bits on from Halfords/Ripspeed and the like just ruin cars imho.
Unless of course you have a Saxo and spend most time in the McDonalds car park doing burnouts!