Rebuilding that engine is not an option. Waay too much damage has been done to it. All that overheating may have cracked the head as well. The engine is junk as far as I'm concerned.

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver