Very simple, there is a philips screw up through the center. Just unscrew and replace.

The new ones are MB # 126 810 00 12 9051 for black. The last 4 numbers are the color code and are needed to buy the part.

5076 = Blue, 8316 = Brazil, 8326 = Date, 8412 = Cream, 3112 = Red, and 7101 = grey.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician