You have to use a small punch and give it a steady hit untill you see the plate move. Nothing will be hurt, even if you go too far. It just means that you have to take it all of the way apart.
------------------
Benzmac:
Donnie Drummonds
1992 500E (very soon I hope

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