Nothing, I repeat, nothing you can do to the stock 86-93 USA headlights will make them worth a damn.

I've installed a number of sets of Bosch/Hella and Depo lights in the many W124s I've owned over the last 20+ years.

The best bargain is the Depo knock off light set with standard H4 bulbs.

The OEM stuff was nicer, but not worth the 2 to 3 times the price increase. Higher wattage bulbs are nicer, but you have to do a lot of rewiring and add relays to make it work well.

Headlight adjust feature is nice, but really is more of a toy after a while, not really necessary.

If you are looking at used lights, pay close attention to the reflectors. A set of euros with dull reflectors doesn't get you any further down the road than the abysmal stock issue lights.

The 94-95 USA lights are so close to the euro lights in function, it doesn't pay to try to upgrade. The 94-95 lights will bolt into the 86-93 models, but will have an odd swage line across top inside corner which is there to clear the 94-95 hood. Works, but looks a bit funky.

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