Congratulations, you've earned the DIY Persistence Pays Off award.
I got lucky on my SDL OM603, plug #4 and #6 came right out, no teasing. I ran the reamer and found almost no carbon build up. A little anti-sieze and the new plug is in.
It's great to read about DIY success here, I'm hoping that's what M-B wants for their autombiles.
Make me want to keep wrenching on my SDL a bit longer. Now, where did I put that list...
Best Regards,
Jim