Yup ur right its 3 little plastic holders that are inserted in the metal in order not to damage it. You just pry where the points are and each should slide off with the right amount of pressure applied. There are no nuts or clips holding it from the inside. Its made to break when pryed at the wrong place.

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1987 190E 2.3 (special lady)

Currently working on a 2.3 16v look conversion... It takes time