First I think you pull the ash tray to get the radio out. Next take out the two screws that are on the top of where the radio was. The wood should pull down and out.
Good luck.
We sell these in the partsshop new or remanufactured.

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Benzmac:
1981 280GE SWB
1987 16V
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM