Agree with most all of the replies...front flex disk first and then timing cover.

Even at the dealership, I'm not aware of the timing cover gasket repair being anywhere near $1200!?? And I don't believe the head has to be breached in order to do the job.

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car