I heartily agree with John. I think it's a bit of a haul from Ft Lauderdale to Gainesville, 1/2 a day drive almost. I have a sister in Gainesville area.
SPIKES you'll notice the timing of the posts is off, I think you have the time zone set incorrectly in your preferences area with MercedesShop, although some times it screws up here just for the "Halibut".
It's hard to ignore a code for the ETC control unit when it's coming directly from the control unit. They MAY need to change the valve body also, sometimes the control unit may need to be updated with a corresponding change to the valve body.