Hi, has anybody expereice ECU update keeps failing? I took my 2K10 MKZ to a Ford dealer for service. Per dealership, the ECU/PCm needed to be repalced. $1100 later, the vehicle was returned fixed. A few days, later I went to use my cruise control. Ther cruise control failed to turn on, so I took the vehicle back to the dealer. Now the dealer tells me there is an issue with latest Ford ECU/PCm software. Mind you, this issue is about a month old.The vehicle currently has a DTC code of P1639, which relates to the ECU/PCm. Keep getting, "we are trying this and that". What gives, has anybody expereiced this type of issue in the past. Any/all suggestions are welcomed. I have complained to the dealership and Ford.