I have an 87' 300 sdl. I would like to get better headlights for it. I keep seeing people talk about euro headlights? I see that importvision sells a pair for about 250$. How do they work on the w126,are they better than stock?

Hi! Welcome to the group!
I've got euro's on my SD, but can't really compare as they were on the car when I bought it. But we've had several threads about them here. Use the "seach" button above and enter "euro headlights". Don't just check in the Diesel forum either. We talked about them over in "open discussion" several time too.
Other then that, they just plain look cool!

__________________
past MB rides:
'68 220D
'68 220D(another one)
'67 230
'84 SD
Current rides:
'06 Lexus RX330
'93 Ford F-250
'96 Corvette
'99 Polaris 700 RMK sled
2011 Polaris Assault
'86 Yamaha TT350(good 'ol thumper)

Euro Headlights are way better than stock, and well worth the money. Just make sure that you are buying Hella, Bosch or Cibie.