What was the idea of my V50 1.6D MY 2007 (i.e. VFL) with approx. 180tkm is a little bit of a bit of a refuelling since the summer of last year? It was a strange thing to say, that there was always – not reproducible and apparently arbitrarily. At first it was only a small “slip-off” – the car went almost full into the engine brake and after a millisecond back to the previous gas level again (also Tempomat just stay on). There was no error in this case (have been read out in a contract workshop). So nothing changed and went on, was also not a bad thing, only a little bit surprising. Since I had it several times in a short time now, I took care to know whether any regularity starts up and the following thing occurred to me: – It only occurs on a warm engine – It occurs all 400 – 600km, sometimes a small Ruckler in between, but longer rucking again only in this interval. – Refresh it can be put off, wait, again, again, again it runs perfectly last week on the highway half the resounding was absolutely no part of the time.