The best thing you can do with your USA lights is throw them in the garbage.

Get OEM with vacuum height adjust if you feel like spending $700, or get the depo lights on ebay for less than $300.

Standard H4 bulbs will give you great light.
I had a 560SEL with 100/130 bulbs, relayed with no voltage drop and the difference over std euro bulbs was less than just swapping in euros vice USA.

Stick with the std euro style, it's a crapshoot whether the non stock looking lights are any better.

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles