There's a lot to consider here, most of it personal opinion and whether or not to keep things original.
If you have a US-spec car, with US sealed beam headlights, keep them. If you like "the look" of euro lights, take a photo of them and make a poster for your office and you can look at them all the time.
There's nothing more peculiar looking to purists, than Euro lights with US side markers or bumper overriders or other US-spec giveaways (or, vice-versa of course). MB may have designed the Euro look but they also designed the sealed beam enclosure too. It wasn't designed by the Feds; it was designed by the mfg to comply with sealed beam requirements existent for all manufacturers at the time.
Euro lights are ungodly expensive today. Crack a US headlight sealed beam, and for $10 at any auto parts store you have a new one. Crack a Euro lens, and go get a loan to replace it. Oh, nobody is lending any money at the moment, so you might have to wait! At today's prices you probably need a loan for any headlight door. I think I paid about $600 each--that was back in 1999. Mine were all cracked and broken.
If you have a Euro spec car, for goodness sake don't change to US. Keep it as it was delivered! If you import one, I don't believe you have to change it any longer as you might have some years ago.
If looks are secondary, and performance is first, I would offer that the US lights "pale" in comparison to the Euro. However you can purchase any number of aftermarket kits to replace the 7" sealed beam with a halogen setup. Cibie, Hella and others make these kits, I think they run around $100 and up. They generally are a bit flatter than a sealed beam, presenting a somewhat different look; offer bulb replacement (H4??) and significantly brighter in operation than traditional sealed beams. Lots of online retailers, and they even sell them at my local foreign auto parts store.
For a few $$ more than the $10 for a sealed beam, you can get what amounts to sealed H4 units. I have these (Sylvania I think) on my car, but I don't really drive much at night.