Gustav has a problem…

our Gustav has a problem, but I don’t know which. Short history: in the last 4 weeks 2x MKL alarm with alleged misignition 2nd cylinder. Suspected fell on ignition coil, therefore as measures delete memory, Ignition coil move for tracking “defect migration”, last week new spark plugs Bosch 4-pole were used in my free Volvo workshop, which according to the statement are the appropriate (according to the specifications of Volvo)(Order number: 0 242 235 748, product: Supe r plus Manufacturer: BOSCH, original part numbers: VOLVO 272207, VOLVO 272371, VOLVO 272372, VOLVO 8642660, VOLVO 8642661, VOLVO 9146775, VW 101 000 035 HJ, user numbers: Blister N20 – FGR 7 DQE, FGR 7 DQ+, FGR 7 DQE+, +23. Source: http://www.100pro-ersatzteile.de/shop/) They have now run about 600km. Yesterday and also yesterday, when the engine was really cold (so running on petrol), the following occurred: Start: no problem gearing up: no problem….but then! Parking in the H interhof(I have to sort of rank in the standing gas): the car ran very unevenly and I had the feeling that he “shaked” and “bocked” almost and did not run on all cylinders. Then after parking to the road with light gas giving: no problem, even the gas acceptance was willing. On the road again as just described… that stopped about a minute, then nothing more. The MKL did not report, even otherwise no error messages, BC also says nothing. Is it possible that the last time you drove on gas would be because of this?