$3,000 oil leak?

The harmonic balance piece on my E320 came apart and ground metal on meatal. There is now a gap in my upper oil pan and timing front cover. The parts are only $380, but the repair center is estimating 30 hours of labor to replace the two parts, bring total close to $3,000. Has anyone ever had these parts replaced, and if so did it cost that much in labor?
http://www.mercedesshop.com/shopforu...threadid=63512
If it didn't get it that bad, then some times they don't leak, if you got it early.
Brian


