thanks for your input
First of all.
Even short Turbo "boost" runs as you describe will not be enough to reach high enough EGT to burn soot in the DPF.
As i told you the car will run at about 120°C DPF temps during 120kp/h - if you accelerate shortly to say 150kp/h egt won't crack 400°C.... 500°C would be needed to burn soot.
A short in town run (like a sprint from one stoplight to another) will not nearly generate the heat required.
But i alsow noticed something.
1: if on motorway use cruisecontrol to accelerate - while it takes longer i do have the imagination that the engine will run leaner with it - generate less soot during acceleration - i observed that this alone can increase range between regen from 650 to nearly 800km (Motorway, not going faster than 150kp/h).
2: clean the intake - getting rid of the EGR soot - helps the engine breath more "clean" air // closing the EGR of after that does help too - i know people are a little uncertain about that but i used it on my car as i bouth it (had 120k km) and while it was a dirty mess (used the Liqui Moly stuff) the car run way way better after that was done. If idle revs have the most negative effect i think it's your EGR-Valve open at that situation recirculating exhaust gases to the intake.... combustion will suffer from that quite a lot. (don't have the EGR-"Problem" anymore).
3: Since about 3000km i'm testing liqui moly 5123 "Diesel Particle Filter Protection", the product claims to reduce ignition temperture of the soot, alowing for faster regeneration.
Observations (number 3):
I don't know if the claim is correct or not but, I noticed the distance between regenerations went up from ~650-700km to ~1000km, however; the regeneration time remains the same (i guess it's ECU controlled somewhere to take at least xx minutes).
Maybe (just gessing) the DPF will burn more of the soot during regeneration as, it's easyer to ignite, so it takes longer for it to get full again. I'll monitor what happens after my bottle is empty... advertised mix is 200ml to 60l of diesel, i used it every second fill up.
It's not realy cheap but, the worst thing you can have is a DPF regeneration starting 2 minutes befor you reach your destination.... while that still can happen, it will only happen once every two or even three weeks now, befor if i was "lucky" it could happen every week....
best regards to all DPF hampered.
oh and btw:
consumption is ok sometwhing around 6 - 7l per 100 including verry verry short city driving (3km) and fast to verry fast Autboahn driving (150-170, 240...). I can't complain - aerodynamics are way better on the delta compared with the 159 (sadly, i realy realy wanted one... but .... they used Diesel like others gasolline...)