Try using a propane torch for a couple minutes to loosen the broken bolt, then try another easy out. If you can see the back end of the bolt (take the splash shield off), give it a coule good smacks with a 5 lb hammer and a blunt punch, too.

The propane torch will get it hot enough to melt the locktite without damaging the knuckle -- acetylene torch is way too hot.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!