Thanks for all the great suggestions. I decided to punch the two sleeve centering pins through the rotor before giving it a whack. Unable to find my hand sledge I used my splitting mall [the fat side] with short swings to the rotor as it spun around. The rotor finally broke free and I felt so good about that I did the other side. More heat and penetrating oil and a lot of stress filled swings with the maul finished the other side. I spent the rest of the day installing new rotors and brake pads. Hopefully I didn't break anything in the suspension and I will check the wheel bearings. I'm not looking forward to doing the back brakes.

I found the back brakes to actually be easier than the fronts (on my W140 at least). Hopefully, it will be the same for you.

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"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles

I just went through this yesterday while replacing the discs on my w203. Took a lot of pounding and liberal use of penetrating degreaser. My buddy and I had to take turns wacking away at the thing. We used a standard hammer, so it probably would've been easier with a heavier hammer. Glad to hear I'm not the only one dealing with fused discs/hubs. The wheels themselves can also fuse to the discs.

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1982 240 D, 308,000 - 321,127 miles (sold)
1982 300 TD,166,500 - 226,000 miles
1998 E 320, 120,000 - 144,000 miles
2005 C 230 K, 26,000 - 77,000 miles (sold)