HELP! My sister just called me. Her 03' CLK 320 is having issues. The mechanic just informed her that she needs a valve job. The car has about 135,000 miles. Is this too soon? Just had the cats replaced, plugs, and mass airflow sensor. WTH! Any suggestions? How much is a reasonable price for a valve job?

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1972 220d gone lived a good life
1972 280se gone but not forgotten
1978 300D the best i ever had
1977 350se speed racer gone
1995 honda accord lx coupe victim of the growing family
1988 300e gone but not forgotten