Just did mine exact same circumstances with the top cracked same with my feet missing , once again chowpit to the rescue sent me the benz manual diagram , shows a 9mm box end wrench under the feet with a flat blade screwdriver under it , the plastic feet i am hoping disolved cause the plastic part that came out i was able to crush into dust with my 2 fingers

93 300e rebadged as a e320 w/68k

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1985 190 2.3
1993 300e 2.8