I found by my pattern of driving in the city, a REGEN would occur at about 90 km and on highways over 200 km. When Soot level is less than 65 or so, no REGEN will occur. (I'm at 11000 KM on the truck)
If I try to open it up, flooring it, heat up the engine, no REGEN will occur. One will not get the Temperatures needed (EGT 3 & EGT4) to REGEN. Even if one did, no REGEN will occur if Soot levels are low. Maybe it slows the climb of soot levels?
The only time, I can have that happen, when towing on the highway, going up long hills (Rocky Mountains, Banff, Yoho National parks area and my RPM are hitting 3000 to 3500, then my EGT 1 & EGT 2 will climb towards 1500 degrees F. very fast.
I notice that EGT 3 & EGT 4 temperature climbs to 1000-1250 F, even though Soot level are less than 60. I don't think, any DEF is being used, but the Soot level seems to stay the same and doesn't climb in value, until I'm back to normal RPM.
My pending conclusion, that I shouldn't worry about REGEN, as the vehicle software seems to be taking care of it without our intervention. By idling a minute or so before shutting down the truck, will give it time to cool down in case a REGEN was occurring at that time.
My current concern is EGT 1 & EGT 2, when temperatures climb towards 1500 degrees F, which I don't expect or seen it happen when not towing. I suspect if those temperatures where maintained to long (long not determined yet), it will lead to engine failure.
Still looking for info about it and what the maximum normal safe temperatures are.
FYI:?
I watched a video, comparing towing capacity and tested on a long road climbing. An interesting comment was made that the RAM never went over 3K RPM. Something a miss about that, I think? They probably were given a customized RAM, as I can't duplicate those results. If VW can cheat, why not others?