if you have a new ptu, like r and r, it may be a good idea to do it at 3k for break in period. 

Just bought a quart of Redline 75W85 GL-5 for the PTU and a quart of MT-LV 70W/75W GL-4 for the RDU. Planning on doing the first fluid changes on the 2024 ST somewhere between 10-15K. I know this is a bit early, but after all the horror stories, seems like a good idea. Peace of mind too. 

Are there any 2019 Ford Edge rear defogger wiring diagrams?

Replacing the IMPA did not help. Tell me, what if I connect this heating to the rear window or mirror heating?

Yep. Search:   site:fordedgeforum.com whatever you want to search here

"Sometimes..."?  I think most times.  The search functionality on these forums is just not very good.  Not just this forum, but almost all forums I visit.  I have never had much luck finding anything on any of the forums I am on.  But your advice about using Google is spot on.  It even sometimes brings you to the very thread in a forum you were trying to find!  Very frustrating.

@EdgeAWD please add your year & model to your profile signature - https://www.fordedgeforum.com/settings/signature/

That is usefully info.  I commented on engine oil but that is different.  The fluid that came out of the ptu at 158k was absolutely burnt.  It is amazing the thing drove in a parking lot up till 168k.  It may have been the longest lasting ptu ever.  It was very noisy but no metal fragments in the case.  When they say it is a regular drain and fill, that is no joke, 30k, in my estimate.  

am happy to provide feedback on other peoples suspension or PTU questions.  surprised one one has any feedback on a basic vacuum spec?  the engine seems like it is almost stalling when pulling into a parking lot off the road, the goes back to horrible idle at 685.  the idle is horrible doubt it is an engine mount. seems like mileage is also bad.   has anyone had a bad torque converter issue? no pronounced noise i can detect, no shifting issues, rev bang, whirling.   for those worried about the 6f50, mine had really clean fluid, no debris, no noises, no shifting issues at 170.  maybe I got lucky but seems like a good trans so far.   

testing some simple things on this engine is a pain as the upper intake goes right over the right side.  I could even compression test the left side.  I would have to buy an adapter to test fuel pressure but it does not behave like the pump is failing on the hwy.