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When users say "random", gives me a strong clue it is linked to the adaptations, (both driving environment and driver), as we drive. Can be set of circumstances and inputs which are causing the delay.
There may be some programming issues, possibly varying between builds.
I'll give an example of my own family experience with identical engine/DSG transmission setups, in two VW vehicles we were running together. One was pretty much flawless, the other erratic, to say the least.
The erratic one, could be caught out in some situations. Software was updated a couple of times, but made virtually no difference. A new gearbox control unit, didn't change the behaviour. Even a new gearbox made little difference. VW just couldn't sort it. All the while, the other vehicle accumulated mileage, in a faultless way.
The other key factor was the drivers. It had three drivers, all who drove in a different way. My sister was the one who had the delays in pull off. My nephew who drives much harder, said it wasn't that bad, but couldn't be driven lightly. My son viewed the gearbox as having no idea what gear it ought to be in on occasion. Was totally 'confused' if you wanted instant performance from a more steady pace. BTW, my son was also driving his X3 35d at the same period, used to a gearbox which did what he wanted, without any issues.
It couldn't have simply been programming, or the other vehicle would have thrown up at least the occasional issue. I put it down to a combination of software limitations, the particular build stack, (possibly engine parameters also feeding back to the gearbox control were different in each vehicle), also the fact different driver inputs also influenced the erratic gearbox function.
It was the fact we ran the two vehicles in parallel, showed how not all vehicles of a particular build are necessarily equal.
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