Hire is how to fix having to slam your doors shut on older Benz cars.
You will need a 3/32" drill bit and a aluminum or stainless rivet about 1/4-3/8" long, white or black zip tie about 5mm wide and around 5/8" long. Place the rivit hole at around 4mm from one end of the zip tie piese. Use a plier to bend the other end up about 1/2" from end with hole. Drill out the hole in the striker mounted to the B or C pillar. Put rivit through zip tie end and install in that very same hole in striker so the 90 degree bent up zip tie end points upward. Good luck!