I think the newer MB models are easier than the older ones. The removal was similar to the one you described, however, there was no removal of a pin.

I just replaced my 2000 E hood ornament with the flat one. With my model, the ornament was one unit that requires a simple twist of the base from the bottom of the ornament.

Open the hood and look at the bottom of the ornament. You need to apply a needle nose plier to the outside grooves of the bottom base and rotate it a quarter turn. There is only one way to rotate it so don't force it. However, some pressure is required. After the quarter turn, the ornament can be removed from the top. I hope this helps.

Eric

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'00 E430 w/ Solaris H-7's
Brabus 19'' Monoblock V, 2 piece
H&R Sport Springs

'99 SLK230 Sport