You might have wired the lights wrong. The stock headlight uses a 5 pin configuration and the euros require a different wire set up.
Search for the Euro headlight installation directions. I bet that is what is wrong.
1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
Monochromatic Paint (Custom Blue)
Flat Badged (front)
custom "carbon fiber" console
18 inch HP EVO rims
Sold! Now I drive a Monte Carlo SS