I believe the harness is priced around $600 and labor is about 4.5 hrs. Factor a dealer labor rate at $90-120/hr. and that would be your cost.

This fix was goodwill'ed for cars with less than 100K miles, but I don't know if the dealers still honor that.

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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